TABLE OF CONTENTS - autocats.ws · table of contents - continued 6.0 acronyms .....27 6.2 definitions ... p0463-fuel level sending unit voltage too high

TABLE OF CONTENTS

1.0 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

1.1 SYSTEM COVERAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11.2 SIX-STEP TROUBLE SHOOTING PROCEDURE. . . . . . . . . . . . . . . . . . . . . . . . . .1

2.0 IDENTIFICATION OF SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

3.0 SYSTEM DESCRIPTION AND FUNCTIONAL OPERATION . . . . . . . . . . . . . . . . . . . . . .2

3.1 GENERAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23.2 FUNCTION OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

3.2.1 FUEL CONTROL (GAS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33.2.2 ON-BOARD DIAGNOSTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33.2.3 TRANSMISSION CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83.2.3.1 TRANSMISSION OPERATION AND SHIFT SCHEDULING AT

VARIOUS OIL TEMPERATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83.2.3.2 LINE PRESSURE CONTROL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .93.2.3.3 DRIVE LEARN PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .93.2.4 TRANSMISSION CONTROL (RE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .113.2.5 O2 SENSOR (NGC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .133.2.6 OTHER CONTROLS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .133.2.7 NON-MONITORED CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

3.3 DIAGNOSTIC TROUBLE CODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .203.3.1 HARD CODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .213.3.2 ONE TRIP FAILURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .213.3.3 INTERMITTENT CODE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .213.3.4 STARTS SINCE SET COUNTER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .213.3.5 TROUBLE CODE ERASURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .223.3.6 QUICK LEARN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .223.3.7 CLUTCH VOLUMES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .233.3.8 NO START INFORMATION (POWERTRAIN) . . . . . . . . . . . . . . . . . . . .23

3.4 USING THE DRBIIIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .233.5 DRBIIIT ERROR MESSAGES AND BLANK SCREEN . . . . . . . . . . . . . . . . . . . . .23

3.5.1 DRBIIIT DOES NOT POWER UP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .243.5.2 DISPLAY IS NOT VISIBLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .243.5.3 SOME DISPLAY ITEMS READ ___. . . . . . . . . . . . . . . . . . . . . . . . . . .24

3.6 TRANSMISSION SIMULATOR (MILLER TOOL #8333) . . . . . . . . . . . . . . . . . . . .24

4.0 DISCLAIMERS, SAFETY, WARNINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

4.1 DISCLAIMERS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .244.2 SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

4.2.1 TECHNICIAN SAFETY INFORMATION. . . . . . . . . . . . . . . . . . . . . . . . .254.2.2 VEHICLE PREPARATION FOR TESTING. . . . . . . . . . . . . . . . . . . . . . .254.2.3 SERVICING SUB-ASSEMBLIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .254.2.4 DRBIIIT SAFETY INFORMATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

4.3 WARNINGS AND CAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .264.3.1 ROAD TEST WARNINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .264.3.2 VEHICLE DAMAGE WARNINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .264.3.2 ROAD TESTING A COMPLAINT VEHICLE (TRANSMISSION) . . . . . .264.3.3 ELECTRONIC PINION FACTOR WARNINGS (IF APPLICABLE) . . . .274.4.4 BULLETINS AND RECALLS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

5.0 REQUIRED TOOLS AND EQUIPMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

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TABLE OF CONTENTS - Continued

6.0 ACRONYMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

6.2 DEFINITIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

7.0 DIAGNOSTIC INFORMATION AND PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . .31

COMMUNICATION*NO RESPONSE FROM PCM (PCI BUS) - JTEC . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32*NO RESPONSE FROM PCM (PCI BUS) - NGC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34*NO RESPONSE FROM PCM (PCM SCI ONLY) - NGC . . . . . . . . . . . . . . . . . . . . . . . .35*NO RESPONSE FROM PCM (SCI ONLY) - JTEC . . . . . . . . . . . . . . . . . . . . . . . . . . . .38*NO RESPONSE FROM SENTRY KEY IMMOBILIZER MODULE . . . . . . . . . . . . . . . .41*NO RESPONSE FROM TRANSFER CASE CONTROL MODULE. . . . . . . . . . . . . . . .43*NO RESPONSE FROM TRANSMISSION CONTROL MODULE - NGC . . . . . . . . . . .45*PCI BUS COMMUNICATION FAILURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48

DRIVEABILITY - GASINTERMITTENT CONDITION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51P0031-O2 SENSOR 1/1 HEATER CIRCUIT LOW . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52P0032-O2 SENSOR 1/1 HEATER CIRCUIT HIGH . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52P0037-O2 SENSOR 1/2 HEATER CIRCUIT LOW . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52P0038-O2 SENSOR 1/2 HEATER CIRCUIT HIGH . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52P0051-O2 SENSOR 2/1 HEATER CIRCUIT LOW . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52P0052-O2 SENSOR 2/1 HEATER CIRCUIT HIGH . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52P0071-AMBIENT/BATTERY TEMP SENSOR PERFORMANCE . . . . . . . . . . . . . . . . . .55P0107-MAP SENSOR VOLTAGE TOO LOW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58P0108-MAP SENSOR VOLTAGE TOO HIGH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60P0111-INTAKE AIR TEMP PERFORMANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62P0112-INTAKE AIR TEMP SENSOR VOLTAGE TOO LOW . . . . . . . . . . . . . . . . . . . . . .64P0113-INTAKE AIR TEMP SENSOR VOLTAGE TOO HIGH . . . . . . . . . . . . . . . . . . . . .66P0117-ENGINE COOLANT TEMP SENSOR VOLTAGE TOO LOW . . . . . . . . . . . . . . .68P0118-ENGINE COOLANT TEMP SENSOR VOLTAGE TOO HIGH . . . . . . . . . . . . . . .70P0121-TP SENSOR VOLTAGE DOES NOT AGREE WITH MAP . . . . . . . . . . . . . . . . .72P0122-THROTTLE POSITION SENSOR #1 VOLTAGE TOO LOW. . . . . . . . . . . . . . . .77P0123-THROTTLE POSITION SENSOR #1 VOLTAGE TOO HIGH . . . . . . . . . . . . . . .80P0125-CLOSED LOOP TEMP NOT REACHED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83P0131-O2 SENSOR 1/1 VOLTAGE TOO LOW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85P0137-O2 SENSOR 1/2 VOLTAGE TOO LOW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85P0151-O2 SENSOR 2/1 VOLTAGE TOO LOW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85P0157-O2 SENSOR 2/2 VOLTAGE TOO LOW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85P0132-O2 SENSOR 1/1 VOLTAGE TOO HIGH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88P0138-O2 SENSOR 1/2 VOLTAGE TOO HIGH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88P0152-O2 SENSOR 2/1 VOLTAGE TOO HIGH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88P0158-O2 SENSOR 2/2 VOLTAGE TOO HIGH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88P0133-O2 SENSOR 1/1 SLOW RESPONSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92P0139-O2 SENSOR 1/2 SLOW RESPONSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92P0153-O2 SENSOR 2/1 SLOW RESPONSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92P0159-O2 SENSOR 2/2 SLOW RESPONSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92P0135-O2 SENSOR 1/1 HEATER FAILURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .95P0141-O2 SENSOR 1/2 HEATER FAILURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .95P0155-O2 SENSOR 2/1 HEATER FAILURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .95P0161-O2 SENSOR 2/2 HEATER FAILURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .95P0136-O2 SENSOR 1/2 HEATER CIRCUIT MALFUNCTION . . . . . . . . . . . . . . . . . . . .98

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P0171-1/1 FUEL SYSTEM LEAN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .100P0174-2/1 FUEL SYSTEM LEAN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .100P0172-1/1 FUEL SYSTEM RICH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .105P0175-2/1 FUEL SYSTEM RICH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .105P0201-INJECTOR #1 CONTROL CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .110P0202-INJECTOR #2 CONTROL CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .110P0203-INJECTOR #3 CONTROL CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .110P0204-INJECTOR #4 CONTROL CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .110P0205-INJECTOR #5 CONTROL CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .110P0206-INJECTOR #6 CONTROL CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .110P0207-INJECTOR #7 CONTROL CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .110P0208-INJECTOR #8 CONTROL CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .110P0300-MULTIPLE CYLINDER MIS-FIRE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .114P0301-CYLINDER #1 MISFIRE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .114P0302-CYLINDER #2 MISFIRE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .114P0303-CYLINDER #3 MISFIRE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .114P0304-CYLINDER #4 MISFIRE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .114P0305-CYLINDER #5 MISFIRE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .114P0306-CYLINDER #6 MISFIRE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .114P0307-CYLINDER #7 MISFIRE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .114P0308-CYLINDER #8 MISFIRE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .114P0320-NO CRANK REFERENCE SIGNAL AT PCM. . . . . . . . . . . . . . . . . . . . . . . . . . .122P0340-NO CAM REFERENCE SIGNAL AT PCM . . . . . . . . . . . . . . . . . . . . . . . . . . . . .126P0351-IGNITION COIL #1 PRIMARY CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .130P0420-1/1 CATALYTIC CONVERTER EFFICIENCY. . . . . . . . . . . . . . . . . . . . . . . . . . .133P0432-2/1 CATALYTIC CONVERTER EFFICIENCY. . . . . . . . . . . . . . . . . . . . . . . . . . .133P0441-EVAP PURGE FLOW MONITOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .135P0442-EVAP LEAK MONITOR MEDIUM (0.040) LEAK DETECTED. . . . . . . . . . . . . .137P0455-EVAP LEAK MONITOR LARGE LEAK DETECTED . . . . . . . . . . . . . . . . . . . . .137P0456-EVAP LEAK MONITOR SMALL (.020) LEAK DETECTED . . . . . . . . . . . . . . . .137P0443-EVAP PURGE SOLENOID CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .140P0460-FUEL LEVEL UNIT NO CHANGE OVER MILES. . . . . . . . . . . . . . . . . . . . . . . .142P0461-FUEL LEVEL UNIT NO CHANGE OVER TIME. . . . . . . . . . . . . . . . . . . . . . . . .142P0462-FUEL LEVEL SENDING UNIT VOLTAGE TOO LOW . . . . . . . . . . . . . . . . . . . .143P0463-FUEL LEVEL SENDING UNIT VOLTAGE TOO HIGH. . . . . . . . . . . . . . . . . . . .145P0500-NO VEHICLE SPEED SIGNAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .147P0505-IDLE AIR CONTROL MOTOR CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . .149P0523-OIL PRESSURE VOLTAGE TOO HIGH. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .151P0601-PCM INTERNAL CONTROLLER FAILURE . . . . . . . . . . . . . . . . . . . . . . . . . . . .153P0622-GENERATOR FIELD NOT SWITCHING PROPERLY . . . . . . . . . . . . . . . . . . . .154P0645-A/C CLUTCH RELAY CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .156P1195-O2 SENSOR 1/1 SLOW DURING CATALYST MONITOR . . . . . . . . . . . . . . . .158P1196-O2 SENSOR 2/1 SLOW DURING CATALYST MONITOR . . . . . . . . . . . . . . . .158P1281-ENGINE IS COLD TOO LONG. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .160P1282-FUEL PUMP/SYSTEM RELAY CONTROL CIRCUIT . . . . . . . . . . . . . . . . . . . .161P1294-TARGET IDLE NOT REACHED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .163P1296-NO 5-VOLTS TO MAP SENSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .165P1297-NO CHANGE IN MAP FROM START TO RUN. . . . . . . . . . . . . . . . . . . . . . . . .167P1388-AUTO SHUTDOWN RELAY CONTROL CIRCUIT. . . . . . . . . . . . . . . . . . . . . . .170P1389-NO ASD RELAY OUTPUT VOLTAGE AT PCM . . . . . . . . . . . . . . . . . . . . . . . . .172P1391-INTERMITTENT LOSS OF CMP OR CKP. . . . . . . . . . . . . . . . . . . . . . . . . . . . .174P1398-MIS-FIRE ADAPTIVE NUMERATOR AT LIMIT . . . . . . . . . . . . . . . . . . . . . . . . .178P1486-EVAP LEAK MONITOR PINCHED HOSE FOUND . . . . . . . . . . . . . . . . . . . . . .181

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P1491-COOLING FAN CONTROL RELAY CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . .183P1492-AMBIENT/BATTERY TEMPERATURE SENSOR VOLTAGE TOO HIGH . . . . .185P1493-AMBIENT/BATTERY TEMPERATURE SENSOR VOLTAGE TOO LOW . . . . .187P1494-LEAK DETECTION PUMP SWITCH OR MECHANICAL FAULT . . . . . . . . . . .189P1495-LEAK DETECTION PUMP SOLENOID CIRCUIT . . . . . . . . . . . . . . . . . . . . . . .191P1594-CHARGING SYSTEM VOLTAGE TOO HIGH . . . . . . . . . . . . . . . . . . . . . . . . . .193P1595-SPEED CONTROL SOLENOID CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . .195P1683-SPD CTRL PWR RELAY; OR S/C 12V DRIVER CKT . . . . . . . . . . . . . . . . . . .195P1596-SPEED CONTROL SWITCH ALWAYS HIGH . . . . . . . . . . . . . . . . . . . . . . . . . .199P1597-SPEED CONTROL SWITCH ALWAYS LOW . . . . . . . . . . . . . . . . . . . . . . . . . . .202P1598-A/C PRESSURE SENSOR VOLTAGE TOO HIGH . . . . . . . . . . . . . . . . . . . . . .204P1599-A/C PRESSURE SENSOR VOLTAGE TOO LOW. . . . . . . . . . . . . . . . . . . . . . .206P1682-CHARGING SYSTEM VOLTAGE TOO LOW. . . . . . . . . . . . . . . . . . . . . . . . . . .208P1685-WRONG OR INVALID KEY MSG RECEIVED FROM SKIM . . . . . . . . . . . . . . .211P1686-NO SKIM BUS MESSAGE RECEIVED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .213P1687-NO CLUSTER BUS MESSAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .215P1696-PCM FAILURE EEPROM WRITE DENIED . . . . . . . . . . . . . . . . . . . . . . . . . . . .216P1899-TRS PERFORMANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .217*BRAKE SWITCH SENSE STATUS DOES NOT CHANGE ON DRBIIIT . . . . . . . . . . .219*CHECKING A/C SYSTEM OPERATION WITH NO DTCS . . . . . . . . . . . . . . . . . . . . .222*CHECKING CHARGING SYSTEM OPERATION WITH NO DTCS . . . . . . . . . . . . . .225*CHECKING RADIATOR FAN OPERATION WITH NO DTCS . . . . . . . . . . . . . . . . . . .228*CHECKING THE PCM POWER AND GROUNDS. . . . . . . . . . . . . . . . . . . . . . . . . . . .230

DRIVEABILITY - NGCINTERMITTENT CONDITION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .231P0016-CRANKSHAFT/CAMSHAFT TIMING MISALIGNMENT . . . . . . . . . . . . . . . . . .232P0031-O2 SENSOR 1/1 HEATER CIRCUIT LOW . . . . . . . . . . . . . . . . . . . . . . . . . . . .236P0037-O2 SENSOR 1/2 HEATER CIRCUIT LOW . . . . . . . . . . . . . . . . . . . . . . . . . . . .236P0051-O2 SENSOR 2/1 HEATER CIRCUIT LOW . . . . . . . . . . . . . . . . . . . . . . . . . . . .236P0057-O2 SENSOR 2/2 HEATER CIRCUIT LOW . . . . . . . . . . . . . . . . . . . . . . . . . . . .236P0032-O2 SENSOR 1/1 HEATER CIRCUIT HIGH . . . . . . . . . . . . . . . . . . . . . . . . . . . .238P0038-O2 SENSOR 1/2 HEATER CIRCUIT HIGH . . . . . . . . . . . . . . . . . . . . . . . . . . . .238P0052-O2 SENSOR 2/1 HEATER CIRCUIT HIGH . . . . . . . . . . . . . . . . . . . . . . . . . . . .238P0058-O2 SENSOR 2/2 HEATER CIRCUIT HIGH . . . . . . . . . . . . . . . . . . . . . . . . . . . .238P0068-MANIFOLD PRESSURE/THROTTLE POSITION CORRELATION- VACUUM LEAK DETECTED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .241P0070-AMBIENT TEMP SENSOR STUCK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .247P0071-AMBIENT TEMP SENSOR PERFORMANCE . . . . . . . . . . . . . . . . . . . . . . . . . .247P0072-AMBIENT TEMP SENSOR CIRCUIT LOW . . . . . . . . . . . . . . . . . . . . . . . . . . . .250P0073-AMBIENT TEMP SENSOR CIRCUIT HIGH. . . . . . . . . . . . . . . . . . . . . . . . . . . .252P0106-MAP SENSOR PERFORMANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .254P0107-MAP SENSOR CIRCUIT LOW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .257P0108-MAP SENSOR CIRCUIT HIGH. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .259P0110-INTAKE AIR TEMPERATURE SENSOR PERFORMANCE. . . . . . . . . . . . . . . .261P0111-INTAKE AIR TEMPERATURE SENSOR PERFORMANCE. . . . . . . . . . . . . . . .261P0112-INTAKE AIR TEMPERATURE SENSOR CIRCUIT LOW. . . . . . . . . . . . . . . . . .264P0113-INTAKE AIR TEMPERATURE SENSOR CIRCUIT HIGH . . . . . . . . . . . . . . . . .266P0116-ENGINE COOLANT TEMPERATURE CIRCUIT PERFORMANCE. . . . . . . . . .268P0117-ENGINE COOLANT TEMPERATURE SENSOR CIRCUIT LOW . . . . . . . . . . .271P0118-ENGINE COOLANT TEMPERATURE SENSOR CIRCUIT HIGH . . . . . . . . . . .273P0121-THROTTLE POSITION SENSOR #1 PERFORMANCE . . . . . . . . . . . . . . . . . .275P0122-THROTTLE POSITION SENSOR #1 LOW . . . . . . . . . . . . . . . . . . . . . . . . . . . .279

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P0123-THROTTLE POSITION SENSOR #1 HIGH . . . . . . . . . . . . . . . . . . . . . . . . . . . .282P0125-INSUFFICIENT COOLANT TEMP FOR CLOSED-LOOP FUELCONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .285P0128-THERMOSTAT RATIONALITY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .287P0129-BAROMETRIC PRESSURE OUT-OF-RANGE . . . . . . . . . . . . . . . . . . . . . . . . .292P0131-O2 SENSOR 1/1 CIRCUIT LOW VOLTAGE . . . . . . . . . . . . . . . . . . . . . . . . . . .295P0137-O2 SENSOR 1/2 CIRCUIT LOW VOLTAGE . . . . . . . . . . . . . . . . . . . . . . . . . . .295P0151-O2 SENSOR 2/1 CIRCUIT LOW VOLTAGE . . . . . . . . . . . . . . . . . . . . . . . . . . .295P0157-O2 SENSOR 2/2 CIRCUIT LOW VOLTAGE . . . . . . . . . . . . . . . . . . . . . . . . . . .295P0132-O2 SENSOR 1/1 CIRCUIT HIGH VOLTAGE . . . . . . . . . . . . . . . . . . . . . . . . . . .298P0138-O2 SENSOR 1/2 CIRCUIT HIGH VOLTAGE . . . . . . . . . . . . . . . . . . . . . . . . . . .298P0152-O2 SENSOR 2/1 CIRCUIT HIGH VOLTAGE . . . . . . . . . . . . . . . . . . . . . . . . . . .298P0158-O2 SENSOR 2/2 CIRCUIT HIGH VOLTAGE . . . . . . . . . . . . . . . . . . . . . . . . . . .298P0133-O2 SENSOR 1/1 SLOW RESPONSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .301P0139-O2 SENSOR 1/2 SLOW RESPONSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .301P0153-O2 SENSOR 2/1 SLOW RESPONSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .301P0159-O2 SENSOR 2/2 SLOW RESPONSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .301P0135-O2 SENSOR 1/1 HEATER PERFORMANCE . . . . . . . . . . . . . . . . . . . . . . . . . .303P0141-O2 SENSOR 1/2 HEATER PERFROMANCE . . . . . . . . . . . . . . . . . . . . . . . . . .303P0155-O2 SENSOR 2/1 HEATER PERFORMANCE . . . . . . . . . . . . . . . . . . . . . . . . . .303P0161-O2 SENSOR 2/2 HEATER PERFORMANCE . . . . . . . . . . . . . . . . . . . . . . . . . .303P0171-FUEL SYSTEM 1/1 LEAN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .306P0174-FUEL SYSTEM 2/1 LEAN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .306P0172-FUEL SYSTEM 1/1 RICH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .312P0175-FUEL SYSTEM 2/1 RICH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .312P0201-FUEL INJECTOR #1 CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .317P0202-FUEL INJECTOR #2 CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .317P0203-FUEL INJECTOR #3 CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .317P0204-FUEL INJECTOR #4 CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .317P0205-FUEL INJECTOR #5 CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .317P0206-FUEL INJECTOR #6 CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .317P0207-FUEL INJECTOR #7 CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .317P0208-FUEL INJECTOR #8 CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .317P0300-MULTIPLE CYLINDER MISFIRE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .320P0301-CYLINDER #1 MISFIRE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .320P0302-CYLINDER #2 MISFIRE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .320P0303-CYLINDER #3 MISFIRE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .320P0304-CYLINDER #4 MISFIRE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .320P0305-CYLINDER #5 MISFIRE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .320P0306-CYLINDER #6 MISFIRE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .320P0307-CYLINDER #7 MISFIRE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .320P0308-CYLINDER #8 MISFIRE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .320P0315-NO CRANK SENSOR LEARNED. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .328P0335-CRANKSHAFT POSITION SENSOR CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . .330P0339-CRANKSHAFT POSITION SENSOR INTERMITTENT . . . . . . . . . . . . . . . . . . .334P0340-CAMSHAFT POSITION SENSOR CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . .338P0344-CAMSHAFT POSITION SENSOR INTERMITTENT . . . . . . . . . . . . . . . . . . . . .342P0351-IGNITION COIL #1 PRIMARY CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .346P0352-IGNITION COIL #2 PRIMARY CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .346P0353-IGNITION COIL #3 PRIMARY CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .346P0354-IGNITION COIL #4 PRIMARY CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .346P0355-IGNITION COIL #5 PRIMARY CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .346P0356-IGNITION COIL #6 PRIMARY CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .346

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P0357-IGNITION COIL #7 PRIMARY CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .346P0358-IGNITION COIL #8 PRIMARY CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .346P0420-CATALYTIC 1/1 EFFICIENCY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .351P0421-WARM UP CATALYST 1/1 EFFECIENCY BELOW THRESHOLD . . . . . . . . . .351P0431-WARM UP CATALYST 2/1 EFFECIENCY BELOW THRESHOLD . . . . . . . . . .351P0440-GENERAL EVAP SYSTEM FAILURE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .353P0441-EVAP PURGE SYSTEM PERFORMANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . .358P0442-EVAP SYSTEM MEDIUM LEAK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .360P0455-EVAP SYSTEM LARGE LEAK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .360P0443-EVAP PURGE SOLENOID CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .364P0452-NVLD PRESSURE SWITCH STUCK CLOSED. . . . . . . . . . . . . . . . . . . . . . . . .366P0453-NVLD PRESSURE SWITCH STUCK OPEN . . . . . . . . . . . . . . . . . . . . . . . . . . .369P0456-EVAP SYSTEM SMALL LEAK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .371P0461-FUEL LEVEL SENSOR #1 PERFORMANCE . . . . . . . . . . . . . . . . . . . . . . . . . .373P0462-FUEL LEVEL SENSOR #1 LOW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .375P0463-FUEL LEVEL SENSOR #1 HIGH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .377P0480-LOW SPEED FAN CONTROL RELAY CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . .379P0498-NVLD CANISTER VENT VALVE SOLENOID CIRCUIT LOW. . . . . . . . . . . . . .381P0499-NVLD CANISTER VENT VALVE SOLENOID CIRCUIT HIGH . . . . . . . . . . . . .383P0501-VEHICLE SPEED SIGNAL PERFORMANCE . . . . . . . . . . . . . . . . . . . . . . . . . .385P0506-IDLE SPEED PERFORMANCE LOWER THAN EXCEPTED . . . . . . . . . . . . . .387P0507-IDLE SPEED PERFORMANCE HIGHER THAN EXCEPTED . . . . . . . . . . . . .389P0508-IAC VALVE SIGNAL CIRCUIT LOW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .391P0509-IAC VALVE SIGNAL CIRCUIT HIGH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .393P0513-INVALID SKIM KEY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .395P0516-BATTERY TEMPERATURE SENSOR LOW . . . . . . . . . . . . . . . . . . . . . . . . . . .397P0517-BATTERY TEMPERATURE SENSOR HIGH . . . . . . . . . . . . . . . . . . . . . . . . . . .399P0519-IDLE SPEED PERFORMANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .401P0523-OIL PRESSURE VOLTAGE HIGH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .403P0532-A/C PRESSURE SENSOR LOW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .405P0533-A/C PRESSURE SENSOR HIGH. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .407P0551-POWER STEERING SWITCH PERFORMANCE . . . . . . . . . . . . . . . . . . . . . . .409P0562-BATTERY VOLTAGE LOW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .411P0563-BATTERY VOLTAGE HIGH. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .414P0579-SPEED CONTROL SWITCH #1 PERFORMANCE . . . . . . . . . . . . . . . . . . . . . .416P0580-SPEED CONTROL SWITCH #1 LOW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .419P0581-SPEED CONTROL SWITCH #1 HIGH. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .421P0582-SPEED CONTROL VACUUM SOLENOID CIRCUIT . . . . . . . . . . . . . . . . . . . . .424P0586-SPEED CONTROL VENT SOLENOID CIRCUIT. . . . . . . . . . . . . . . . . . . . . . . .426P0594-SPEED CONTROL SERVO POWER CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . .428P0600-SERIAL COMMUNICATION LINK. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .431P0601-INTERNAL MEMORY CHECKSUM INVALID. . . . . . . . . . . . . . . . . . . . . . . . . . .431P0622-GENERATOR FIELD CONTROL CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . .432P0627-FUEL PUMP RELAY CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .434P0630-VIN NOT PROGRAMMED IN PCM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .436P0632-ODOMETER NOT PROGRAMMED IN PCM. . . . . . . . . . . . . . . . . . . . . . . . . . .437P0633-SKIM KEY NOT PROGRAMMED IN PCM. . . . . . . . . . . . . . . . . . . . . . . . . . . . .438P0645-A/C CLUTCH RELAY CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .439P0685-ASD RELAY CONTROL CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .441P0688-ASD RELAY SENSE CIRCUIT LOW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .443P0700-TRANSMISSION CONTROL SYSTEM (MIL REQUEST) . . . . . . . . . . . . . . . . .446P0850-PARK/NEUTRAL SWITCH PERFORMANCE . . . . . . . . . . . . . . . . . . . . . . . . . .447P1115-GENERAL TEMPERATURE SENSOR PERFORMANCE . . . . . . . . . . . . . . . . .449

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P1602-PCM NOT PROGRAMMED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .451P1603-PCM INTERNAL DAUL-PORT RAM COMMUNICATION . . . . . . . . . . . . . . . . .452P1604-PCM INTERNAL DAUL-PORT RAM READ/WRITE INTEGRITYFAILURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .452P1607-PCM INTERNAL SHUTDOWN TIMER RATIONALITY . . . . . . . . . . . . . . . . . . .452P1686-NO SKIM BUS MESSAGES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .454P1687-NO CLUSTER BUS MESSAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .456P1696-PCM FAILURE EEPROM WRITE DENIED . . . . . . . . . . . . . . . . . . . . . . . . . . . .457P1697-PCM FAILURE SRI MILES NOT STORED . . . . . . . . . . . . . . . . . . . . . . . . . . . .457P1698-NO BUS MESSAGE FROM TRANS CONTROL MODULE . . . . . . . . . . . . . . .459P2503-CHARGING SYSTEM OUTPUT LOW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .461*BRAKE SWITCH SENSE STATUS DOES NOT CHANGE ON DRB . . . . . . . . . . . . .464*CHECKING A/C OPERATION WITH NO DTCS . . . . . . . . . . . . . . . . . . . . . . . . . . . . .466*CHECKING PCM POWERS AND GROUNDS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .469

SENTRY KEY IMMOBILIZERANTENNA FAILURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .470COP FAILURE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .470EEPROM FAILURE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .470INTERNAL FAULT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .470RAM FAILURE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .470SERIAL LINK INTERNAL FAULT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .470STACK OVERFLOW FAILURE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .470PCM STATUS FAILURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .472SERIAL LINK EXTERNAL FAULT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .472ROLLING CODE FAILURE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .474VIN MISMATCH. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .474TRANSPONDER COMMUNICATION FAILURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .476TRANSPONDER CYCLIC REDUNDANCY CHECK (CRC) FAILURE . . . . . . . . . . . . .476TRANSPONDER ID MISMATCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .476TRANSPONDER RESPONSE MISMATCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .476

STARTING*CHECKING FUEL DELIVERY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .479*CHECKING HARD START (FUEL DELIVERY SYSTEM) . . . . . . . . . . . . . . . . . . . . . .482*CHECKING HARD TO FILL WITH FUEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .484*ENGINE CRANKS DOES NOT START . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .485*FUEL PRESSURE LEAK DOWN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .488*NO CRANK CONDITION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .489*NO RESPONSE FROM PCM WITH A NO START CONDITION . . . . . . . . . . . . . . . .492*START AND STALL CONDITION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .495

TRANSFER CASE - ELECTRONIC12 VOLT OVER VOLTAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49712 VOLT UNDER VOLTAGE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4982WD/AWD INDICATOR OPEN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5002WD/AWD INDICATOR SHORT TO GROUND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5034WD HI INDICATOR OPEN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5054WD HI INDICATOR SHORT TO GROUND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5074WD LO INDICATOR OPEN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5094WD LO INDICATOR SHORT TO GROUND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5115 VOLT OVER VOLTAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5135 VOLT UNDER VOLTAGE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .515

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INTERNAL ERROR. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .517MISSING BRAKE INPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .518MISSING ENGINE RPM INPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .519MISSING IGNITION MESSAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .520MISSING LAMP DIMMING MESSAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .521MISSING TRANSMISSION POSITION INPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .522MISSING VEHICLE SPEED INPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .524NEUTRAL INDICATOR OPEN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .526NEUTRAL INDICATOR SHORT TO GROUND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .529TRANSFER CASE MODE SENSOR ERROR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .531TRANSFER CASE SELECTOR SWITCH ERROR . . . . . . . . . . . . . . . . . . . . . . . . . . . .534

TRANSMISSION - NGCP0122-THROTTLE POSITION SENSOR LOW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .537P0123-THROTTLE POSITION SENSOR HIGH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .539P0124-THROTTLE POSITION SENSOR INTERMITTENT. . . . . . . . . . . . . . . . . . . . . .541P0218-HIGH TEMPERATURE OPERATION ACTIVATED . . . . . . . . . . . . . . . . . . . . . .544P0562-LOW BATTERY VOLTAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .546P0604-INTERNAL TCM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .551P0605-INTERNAL TCM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .552P0613-INTERNAL TCM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .553P0706-CHECK SHIFTER SIGNAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .554P0711-TRANSMISSION TEMPERATURE SENSOR PERFORMANCE. . . . . . . . . . . .563P0712-TRANSMISSION TEMPERATURE SENSOR LOW. . . . . . . . . . . . . . . . . . . . . .566P0713-TRANSMISSION TEMPERATURE SENSOR HIGH . . . . . . . . . . . . . . . . . . . . .569P0714-TRANSMISSION TEMPERATURE SENSOR INTERMITTENT . . . . . . . . . . . .573P0715-INPUT SPEED SENSOR ERROR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .576P0720-OUTPUT SPEED SENSOR ERROR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .581P0725-ENGINE SPEED SENSOR CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .586P0731-GEAR RATIO ERROR IN 1ST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .588P0732-GEAR RATIO ERROR IN 2ND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .590P0733-GEAR RATIO ERROR IN 3RD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .593P0734-GEAR RATIO ERROR IN 4TH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .596P0735-GEAR RATIO ERROR 4TH PRIME . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .598P0736-GEAR RATIO ERROR IN REVERSE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .600P0740-TORQUE CONVERTER CLUTCH CONTROL CIRCUIT. . . . . . . . . . . . . . . . . .602P0750-LR SOLENOID CIRCUIT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .604P0755-2C SOLENOID CIRCUIT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .609P0760-OD SOLENOID CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .614P0765-UD SOLENOID CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .619P0770-4C SOLENOID CIRCUIT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .624P0841-LR PRESSURE SWITCH SENSE CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . .629P0845-2C HYDRAULIC PRESSURE TEST FAILURE . . . . . . . . . . . . . . . . . . . . . . . . .634P0846-2C PRESSURE SWITCH SENSE CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . .641P0868-LINE PRESSURE LOW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .645P0869-LINE PRESSURE HIGH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .650P0870-OD HYDRAULIC PRESSURE TEST FAILURE . . . . . . . . . . . . . . . . . . . . . . . . .655P0871-OD PRESSURE SWITCH SENSE CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . .662P0875-UD HYDRAULIC PRESSURE TEST FAILURE . . . . . . . . . . . . . . . . . . . . . . . . .666P0876-UD PRESSURE SWITCH SENSE CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . .673P0884-POWER UP AT SPEED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .678P0888-RELAY OUTPUT ALWAYS OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .680P0890-SWITCHED BATTERY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .685

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P0891-TRANSMISSION RELAY ALWAYS ON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .687P0932-LINE PRESSURE SENSOR CIRCUIT FAULT. . . . . . . . . . . . . . . . . . . . . . . . . .690P0934-LINE PRESSURE SENSOR LOW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .693P0935-LINE PRESSURE SENSOR HIGH. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .696P0944-LOSS OF PRIME. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .700P0987-4C HYDRAULIC PRESSURE TEST FAILURE . . . . . . . . . . . . . . . . . . . . . . . . .703P0988-4C PRESSURE SWITCH SENSE CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . .710P1684-BATTERY WAS DISCONNECTED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .715P1694-BUS COMMUNICATION WITH ENGINE MODULE. . . . . . . . . . . . . . . . . . . . . .717P1715-RESTRICTED PORT IN T3 RANGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .719P1736-GEAR RATIO ERROR IN 2ND PRIME . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .721P1775-SOLENOID SWITCH VALVE LATCHED IN TCC POSITION . . . . . . . . . . . . . .723P1776-SOLENOID SWITCH VALVE LATCHED IN LR POSITION. . . . . . . . . . . . . . . .728P1790-FAULT IMMEDIATELY AFTER SHIFT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .733P1793-TRD LINK COMMUNICATION ERROR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .735P1794-SPEED SENSOR GROUND ERROR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .737P2700-INADEQUATE ELEMENT VOLUME LR. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .740P2701-INADEQUATE ELEMENT VOLUME 2C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .742P2702-INADEQUATE ELEMENT VOLUME OD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .744P2703- INADEQUATE ELEMENT VOLUME UD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .746P2704-INADEQUATE ELEMENT VOLUME 4C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .748P2706-MS SOLENOID CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .750*BACKUP LAMPS COME ON WHILE SHIFTER IS NOT IN REVERSE POSITION. .755*BACKUP LAMPS INOPERATIVE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .756*BUMP FELT SHORTLY AFTER STOP WITH NO DTCS PRESENT . . . . . . . . . . . . .758*BUMP FELT WHILE COASTING IN NEUTRAL WITH NO DTCS PRESENT . . . . . .759*POOR SHIFT QUALITY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .760*TRANSMISSION NOISY WITH NO DTCS PRESENT . . . . . . . . . . . . . . . . . . . . . . . .761*TRANSMISSION SHIFTS EARLY WITH NO DTCS . . . . . . . . . . . . . . . . . . . . . . . . . .763*TRANSMISSION SHIFTS ROUGH AFTER PCM REPLACEMENT OR REFLASH. .764*TRANSMISSION SIMULATOR WILL NOT POWER UP . . . . . . . . . . . . . . . . . . . . . . .765*VEHICLE IS SLUGGISH WITH NO DTCS PRESENT . . . . . . . . . . . . . . . . . . . . . . . .766

TRANSMISSION - REP0711-TRANS TEMP SENSOR, NO TEMP RISE AFTER START. . . . . . . . . . . . . . . .768P0712-TRANS TEMP SENSOR VOLTAGE TOO LOW. . . . . . . . . . . . . . . . . . . . . . . . .771P0713-TRANS TEMP SENSOR VOLTAGE TOO HIGH . . . . . . . . . . . . . . . . . . . . . . . .776P0720-LOW OUTPUT SPEED SENSOR - RPM ABOVE 15 MPH . . . . . . . . . . . . . . .781P0743-TORQUE CONVERTER CLUTCH SOLENOID/TRANS RELAY CIRCUITS. . .785P0748-PRESSURE SOL CONTROL/TRANS RELAY CIRCUITS. . . . . . . . . . . . . . . . .790P0751-O/D SWITCH PRESSED (LO) MORE THAN 5 MINUTES . . . . . . . . . . . . . . . .794P0753-TRANS 3-4 SHIFT SOL/TRANS RELAY CIRCUITS . . . . . . . . . . . . . . . . . . . . .796P1740-TCC O/D SOL PERFORMANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .800P1756-GOV PRESS NOT EQUAL TO TARGET @ 15-20 PSI. . . . . . . . . . . . . . . . . . .805P1756-GOV PRESS NOT EQUAL TO TARGET @ 35 - 40 PSI (DIESEL) . . . . . . . . .805P1757-GOV PRESS ABOVE 3 PSI IN GEAR WITH 0 MPH . . . . . . . . . . . . . . . . . . . .812P1762-GOV PRESS SEN OFFSET VOLTS TOO LO OR HIGH . . . . . . . . . . . . . . . . .817P1763-GOVERNOR PRESSURE SENSOR VOLTS TOO HI . . . . . . . . . . . . . . . . . . . .821P1764-GOVERNOR PRESSURE SENSOR VOLTS TOO LOW . . . . . . . . . . . . . . . . .826P1765-TRANS 12 VOLT SUPPLY RELAY CTRL CIRCUIT . . . . . . . . . . . . . . . . . . . . .829

VERIFICATION TESTSVERIFICATION TESTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .832

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8.0 COMPONENT LOCATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .845

8.1 CONTROL MODULES & PDC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8458.2 DATA LINK CONNECTOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8458.3 SENSORS AND SOLENOIDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8468.4 FUEL SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8528.5 SWITCHES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .853

9.0 CONNECTOR PINOUTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .855

A/C COMPRESSOR CLUTCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .855A/C PRESSURE TRANSDUCER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .855AMBIENT TEMPERATURE SENSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .855BATTERY TEMPERATURE SENSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .855BRAKE LAMP SWITCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .856BRAKE TRANSMISSION SHIFT INTERLOCK SOLENOID . . . . . . . . . . . . . . . . . . . . .856CAMSHAFT POSITION SENSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .856CAPACITOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .856CLOCKSPRING C1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .856CLOCKSPRING C3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .857COIL ON PLUG NO. 1 (4.7L) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .857COIL ON PLUG NO. 2 (4.7L) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .857COIL ON PLUG NO. 3 (4.7L) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .857COIL ON PLUG NO. 4 (4.7L) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .858COIL ON PLUG NO. 5 (4.7L) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .858COIL ON PLUG NO. 6 (4.7L) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .858COIL ON PLUG NO. 7 (4.7L) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .858COIL ON PLUG NO. 8 (4.7L) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .859CONTROLLER ANTILOCK BRAKE C1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .859CRANKSHAFT POSITION SENSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .859DATA LINK CONNECTOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .860ENGINE COOLANT TEMPERATURE SENSOR (4.7L) . . . . . . . . . . . . . . . . . . . . . . . .860ENGINE COOLANT TEMPERATURE SENSOR (5.9L) . . . . . . . . . . . . . . . . . . . . . . . .860ENGINE OIL PRESSURE SWITCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .860FUEL INJECTOR NO. 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .861FUEL INJECTOR NO. 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .861FUEL INJECTOR NO. 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .861FUEL INJECTOR NO. 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .861FUEL INJECTOR NO. 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .862FUEL INJECTOR NO. 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .862FUEL INJECTOR NO. 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .862FUEL INJECTOR NO. 8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .862FUEL PUMP MODULE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .863GENERATOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .863GENERATOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .863IDLE AIR CONTROL MOTOR (4.7L) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .863IDLE AIR CONTROL MOTOR (5.9L) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .864IGNITION COIL (5.9L). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .864IGNITION SWITCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .864INPUT SPEED SENSOR (4.7L) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .864INTAKE AIR TEMPERATURE SENSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .865FUSES (JB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .867LEAK DETECTION PUMP (5.9L) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .867

x


LEFT SPEED CONTROL SWITCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .867LEFT TAIL LAMP ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .868LINE PRESSURE SENSOR (4.7L) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .868MANIFOLD ABSOLUTE PRESSURE SENSOR (4.7L) . . . . . . . . . . . . . . . . . . . . . . . . .868MANIFOLD ABSOLUTE PRESSURE SENSOR (5.9L) . . . . . . . . . . . . . . . . . . . . . . . . .868NATURAL VACUUM LEAK DETECTION ASSEMBLY (4.7L) . . . . . . . . . . . . . . . . . . . .869OUTPUT SPEED SENSOR (4.7L) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .869OUTPUT SPEED SENSOR (5.9L) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .869OVERDRIVE SWITCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .869OXYGEN SENSOR 1/1 UPSTREAM (4.7L CALIFORNIA) . . . . . . . . . . . . . . . . . . . . . .870OXYGEN SENSOR 1/1 UPSTREAM (4.7L EXCEPT CALIFORNIA) . . . . . . . . . . . . . .870OXYGEN SENSOR 1/1 UPSTREAM (5.9L CALIFORNIA) . . . . . . . . . . . . . . . . . . . . . .870OXYGEN SENSOR 1/1 UPSTREAM (5.9L EXCEPT CLAIFORNIA) . . . . . . . . . . . . . .871OXYGEN SENSOR 1/2 DOWNSTREAM (4.7L CALIFORNIA). . . . . . . . . . . . . . . . . . .871OXYGEN SENSOR 1/2 DOWNSTREAM (4.7L EXCEPT CALIFORNIA). . . . . . . . . . .871OXYGEN SENSOR 1/2 DOWNSTREAM (5.9L CALIFORNIA). . . . . . . . . . . . . . . . . . .871OXYGEN SENSOR 1/2 DOWNSTREAM (5.9L EXCEPT CALIFORNIA). . . . . . . . . . .872OXYGEN SENSOR 2/1 UPSTREAM (4.7L CALIFORNIA) . . . . . . . . . . . . . . . . . . . . . .872OXYGEN SENSOR 2/1 UPSTREAM (5.9L CALIFORNIA) . . . . . . . . . . . . . . . . . . . . . .872OXYGEN SENSOR 2/2 DOWNSTREAM (4.7L CALIFORNIA). . . . . . . . . . . . . . . . . . .873OXYGEN SENSOR 2/2 DOWNSTREAM (5.9L CALIFORNIA). . . . . . . . . . . . . . . . . . .873FUSES (PDC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .875A/C COMPRESSOR CLUTCH RELAY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .875AUTOMATIC SHUT DOWN RELAY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .876FUEL PUMP RELAY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .876OXYGEN SENSOR DOWNSTREAM HEATER RELAY (CALIFORNIA) . . . . . . . . . . .876RADIATOR FAN RELAY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .876STARTER MOTOR RELAY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .876TRANSMISSION CONTROL RELAY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .876POWER STEERING PRESSURE SWITCH (4.7L) . . . . . . . . . . . . . . . . . . . . . . . . . . . .877POWERTRAIN CONTROL MODULE C1 (4.7L NGC). . . . . . . . . . . . . . . . . . . . . . . . . .877POWERTRAIN CONTROL MODULE C1 (5.9L JTEC) . . . . . . . . . . . . . . . . . . . . . . . . .878POWERTRAIN CONTROL MODULE C2 (4.7L NGC). . . . . . . . . . . . . . . . . . . . . . . . . .879POWERTRAIN CONTROL MODULE C2 (5.9L JTEC) . . . . . . . . . . . . . . . . . . . . . . . . .880POWERTRAIN CONTROL MODULE C3 (4.7L NGC). . . . . . . . . . . . . . . . . . . . . . . . . .881POWERTRAIN CONTROL MODULE C3 (5.9L JTEC) . . . . . . . . . . . . . . . . . . . . . . . . .882POWERTRAIN CONTROL MODULE C4 (4.7L NGC). . . . . . . . . . . . . . . . . . . . . . . . . .883PROPORTIONAL PURGE SOLENOID (5.9L) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .883RADIATOR FAN MOTOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .884RIGHT SPEED CONTROL SWITCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .884RIGHT TAIL LAMP ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .884SENTRY KEY IMMOBILIZER MODULE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .884SPEED CONTROL SERVO (4.7L) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .884SPEED CONTROL SERVO (5.9L) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .885THROTTLE POSITION SENSOR (4.7L) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .885THROTTLE POSITION SENSOR (5.9L) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .885TRAILER TOW CONNECTOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .885TRANSFER CASE CONTROL MODULE C1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .886TRANSFER CASE CONTROL MODULE C2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .886TRANSFER CASE CONTROL MODULE C3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .886TRANSFER CASE MODE SENSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .887TRANSFER CASE SELECTOR SWITCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .887TRANSFER CASE SHIFT MOTOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .887

xi


TRANSMISSION RANGE SENSOR (5.9L) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .887TRANSMISSION SOLENOID ASSEMBLY (5.9L) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .888TRANSMISSION SOLENOID/TRS ASSEMBLY (4.7L) . . . . . . . . . . . . . . . . . . . . . . . . .888

10.0 SCHEMATIC DIAGRAMS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .889

10.1 5.9L DN/AN84 FEDERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88910.2 5.9L AN AND DN/AN84 CALIFORNIA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .89010.3 TRUCK 4.7L AN/DN FEDERAL & CALIFORNIA NGC 1 SYSTEM. . . . . . . . . . .89110.4 TRANSMISSION SYSTEM - NGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .89210.5 TRANSFER CASE SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .893

11.0 CHARTS AND GRAPHS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .895

xii

IMPORTANTNew for the 2003 DN, the Powertrain Con-

trol Module and Transmission Control Modulehave been combined into single control mod-ule on vehicles equipped with a 4.7L. This newmodule is the Next Generation Controller(NGC1). On 5.9L gas engines the PowertrainControl Module utilizes the JTEC modulewhich includes RE transmission control infor-mation.

New Diagnostics procedures and New DTCnumbers are two of the changes you will seewhich reflect the new combined module tech-nology. The NGC modules will have four colorcoded connectors C1 (A) through C4 (C), (C1-BLK, C2-GRAY, C3-WHITE, C4-GREEN). EachPCM connector has 38 pins. Two new toolswere introduced to help diagnose and repairthe new PCM (NGC) terminals and harnessconnectors. The Miller #3638 terminal re-moval pick must be used to release the con-nector terminals, or harness and connectordamage will occur. Also, the Miller #8815 Pin-out Box was introduced. You must use theMiller #8815 tool instead of probing the PCMterminals, or harness and connector damagewill occur. There is also a new Verification testand module replacement procedure for thenew PCM.

1.0 INTRODUCTION

The procedures contained in this manual includespecifications, instructions, and graphics needed todiagnose the PCM Powertrain System. The diag-nostics in this manual are based on the failurecondition or symptom being present at thetime of diagnosis. Please follow the recommenda-tions below when choosing your diagnostic path.1. First make sure the DRBIIIt is communicating

with the appropriate modules; i.e., if theDRBIIIt displays a No Response condition, youmust diagnose this first before proceeding.

2. Read DTCs (diagnostic trouble codes) with theDRBIIIt.

3. If no DTCs are present, identify the customercomplaint.

4. Once the DTC or customer complaint is identi-fied, locate the matching test in the Table ofContents and begin to diagnose the symptom.

All component location views are in Section 8.0.All connector pinouts are in Section 9.0. All systemschematic diagrams are in Section 10.0. All chartsand graphs are in Section 11.0.

An * placed before the symptom description indi-cates a customer complaint.

When repairs are required, refer to the appropri-ate service manual for the proper removal andrepair procedure.

Diagnostic procedures change every year. Newdiagnostic systems may be added; current systemsmay be enhanced. READ THIS MANUAL BEFORETRYING TO DIAGNOSE A VEHICLE DTC. It isrecommended that you review the entire manual tobecome familiar with all new and enhanced diag-nostic procedures.

After using this book, if you have any commentsor recommendations, please fill out the form at theback of the book and mail it back to us.

1.1 SYSTEM COVERAGE

This diagnostic procedure manual covers Power-train, Transmission, and Electronic Transfer Casediagnostics for the 2003 Dodge Truck (DN) vehiclesequipped with the JTEC, Next Generation ControlModule 1(NGC1).

1.2 SIX-STEP TROUBLE SHOOTINGPROCEDURE

Diagnosis of the Powertrain/Engine Control Mod-ule (PCM) is done in six basic steps: verification of complaint verification of any related symptoms symptom analysis problem isolation repair of isolated problem verification of proper operation

2.0 IDENTIFICATION OFSYSTEM

The Powertrain/Engine Control Module (PCM)monitors and controls: fuel system ignition system charging system speed control system The NGC1 module is only used on trucks with a

4.7L engine and an automatic transmission. The JTEC module is used on trucks with a 5.9L

engine. The 45RFE/545RFE Transmission family can be

identified by confirming the presence of a 23 pinelectrical connector on the left hand side of thetransmission oriented vertically near the manuallever.

1

GENERAL INFORMATION

The Electronic Transfer Case can be identifiedby the Transfer Case Identification Tag, confirm-ing the presence of a Shift Motor or the SelectorSwitch on the dash panel.

3.0 SYSTEM DESCRIPTION ANDFUNCTIONAL OPERATION

3.1 GENERAL DESCRIPTION

POWERTRAINThe on-board OBDII diagnostics incorporated

with the PCM are intended to assist the fieldtechnician in repairing vehicle problems by thequickest means.

TRANSMISSIONThe 45RFE/545RFE electronic transmission is a

conventional transmission in that it uses hydrauli-cally applied clutches to shift a planetary geartrain. However, the electronic control system re-places many of the mechanical and hydraulic com-ponents used in conventional transmission valvebodies.

The 45RFE/545RFE electronic transmission is afully electronically controlled transmission. ThePowertrian Control Module (PCM) is similar to (butnot the same as) the one used in the 41TE and 42LEtransmissions, therefore many similarities exist infunction and diagnosis.

The 45RFE/545RFE has an overrunning clutch(used in 1st gear), an electronically controlledtorque converter clutch, 3 planetary gearsets, andsix clutch packs. The clutches are called 2nd Clutch(2C), 4th Clutch (4C), Low/Reverse Clutch (LR),Reverse Clutch (RC), Underdrive Clutch (UD), andOverdrive Clutch (OD).

Although the 45RFE is considered a 4 speedtransmission, it really has 5 forward gear ratios.The 545RFE is considered a 5 speed transmission,it really has 6 forward gear ratios. 2nd gear (1.67:1)and 2nd prime (1.50:1) gear are so close in ratio thatthey are not considered to be different gear ratios,although both are used as 2nd gear under certainconditions. During most upshift and downshift ma-neuvers, 2nd gear will be used. 2nd prime gear isonly used for a high speed 4-2 downshift. The545RFE transmission is essentially a softwarechange to the PCM that allows an additional over-drive ratio of (.667:1). The gear ratio of 4th Prime isachieved by applying the 2C and OD clutches. The4th Prime is used above 52 MPH. All gear ratios inthe 45RFE/545RFE are achieved by applying twoelements (clutches). During a shift, one element isreleased and another is applied, resulting in a

different ratio. This is called a clutch to clutch shift.In order to perform a 4-2 downshift, two elementswould have to be released and two different ele-ments applied. The 2nd prime gear ratio allows aclutch to clutch 4-2 (2nd prime) downshift.

The oil pump in the 45RFE/545RFE is a dualstage positive displacement gear type pump. At idleand low engine speeds, both stages are working.Once the engine speed reaches a point where oneside of the pump can supply the necessary systemrequirements, the second stage is vented. Thispump configuration gives the pressure and flow of alarge displacement pump at low speeds, and theeconomy of a small displacement pump at higherengine speeds. The oil pump housing also containssome of the valves that are found in the valve bodyin a 41TE or 42LE transmission. The ConverterClutch Switch Valve, Converter Clutch RegulatorValve, Torque Converter Limit Valve, and the Pres-sure Regulator Valve, are all found in the oil pumphousing.

The electronic control system consists of a Pow-ertrain Control Module (PCM), a TransmissionRange Sensor (TRS), an Input Speed Sensor (ISS),an Output Speed Sensor (OSS), a Line PressureSensor (LPS), a Transmission Temperature Sensor(TTS), five pressure switches, and seven solenoids.Each clutch pack has a corresponding solenoid andpressure switch except for the reverse clutch whichis controlled by the manual valve. The other twosolenoids are called the Multi Select (MS) solenoidand the Pressure Control Solenoid (PCS).

The PCS is used to control line pressure. The45RFE/545RFE controls line pressure based oninputs to the PCM. The line pressure is torquebased (line pressure increases with torque) most ofthe time, however it is set to a predetermined valuejust prior to a shift and reverts back to torque basedafter the shift.

The MS solenoid is used to control the LR clutchduring P-R and N-R garage shifts and to control theOD clutch when the Manual Valve is in the Dposition as reported by the TRS. If the manual valveis slightly out of position, the TRS will indicate atemporary zone (T3 or T4). In this case the ODclutch will be controlled by the OD solenoid. Notethat if the TRS indicates a temporary zone, this is avalid PRNDL code and will not set a DTCP0706(28). If the PRNDL code consistenly indicatesa temporary zone while the shift lever is in the Dposition, this would indicate some sort of mechani-cal problem in the shift linkage as opposed to anelectrical TRS problem. Note: vehicle operation inthe T3 temporary zone can set a DTC P1715(65).

TRANSFERCASEThe 133 Electronic Transfer Case is a new

conventional transfer case. The 133 Transfer Case

2

GENERAL INFORMATION

uses the same control module system as the 233/244but, has only two transfer case positions, 2 HI and4HI. The 133 Transfer Case uses a shift motor toplace the transfer case into the desired range. Amulti-position switch selector is located on the dashpanel in place of a manual shift lever located on thefloor.

The Transfer Case shift motor is a bi-directional,2-wire motor. When the motor is energized, one ofthe leads is 12-volts and the other is ground. Re-versing the polarity of the motor changes the direc-tion of the rotation of the motor. The motor has alow speed, high torque output.

The Transfer Case Mode Sensor consists of amagnetic ring and four Hall Effect transistors thatconvert the shaft position into a coded signal sent tothe TCCM. The magnet forces the output of the Halldevice low when it is passed over it. The ModeSensor is supplied 5 volts and a ground from theTCCM and has four output lines that feed back tothe TCCM.

The Transfer Case Selector Switch is a multi-position, multi resistance switch that tells theTCCM what range is commanded. The Neutralbutton and 4LO Switch position are removed for the133 Transfer Case. The switch assembly has onlytwo positions. The 2 HI and 4HI are the onlyTransfer Case positions available on the 133 Trans-fer Case.

The 233/244 Electronic Transfer Case is aconventional transfer case that uses a shift motor toplace the transfer case into the desired range. Amulti-position switch selector is located on the dashpanel in place of a manual shift lever located on thefloor.

The Transfer Case shift motor is a bi-directional,2-wire motor. When the motor is energized, one ofthe leads is 12-volts and the other is ground. Re-versing the polarity of the motor changes the direc-tion of the rotation of the motor. The motor has alow speed, high torque output.

The Transfer Case Mode Sensor consists of amagnetic ring and four Hall Effect transistors thatconvert the shaft position into a coded signal sent tothe TCCM. The magnet forces the output of the Halldevice low when it is passed over it. The ModeSensor is supplied 5 volts and a ground from theTCCM and has four output lines that feed back tothe TCCM.

The Transfer Case Selector Switch is a multi-position, multi resistance switch that tells theTCCM what range is commanded. The switch as-sembly also contains a separate Neutral Button andfour indicators, one for each selectable range.

3.2 FUNCTION OPERATION

3.2.1 FUEL CONTROL (GAS)The PCM controls the air/fuel ratio of the engine

by varying fuel injector on time. Mass air flow iscalculated using the speed density method usingengine speed and manifold absolute pressure (IATis a modifier in Speed Density).

Different fuel calculation strategies are used de-pending on the operational state of the engine.During crank mode, a prime shot fuel pulse isdelivered followed by fuel pulses determined by acrank time strategy. Cold engine operation is deter-mined via an open loop strategy until the O2sensors have reached operating temperature. Atthis point, the strategy enters a closed loop modewhere fuel requirements are based upon the state ofthe O2 sensors, engine speed, MAP, throttle posi-tion, air temperature, battery voltage, and coolanttemperature.

3.2.2 ON-BOARD DIAGNOSTICSThe PCM has been programmed to monitor any

circuit or system that has an effect on vehicleemissions, or is used by the PCM to determine theproper functionality of these systems. This monitor-ing is called on-board diagnosis.

Certain criteria or, arming conditions, must bemet before a trouble code will be entered into thePCM memory. The criteria range from engine rpm,engine temperature, and/or input voltage to thePCM. If a problem is detected with a monitoredcircuit, and all of the criteria or arming conditionsare met, a trouble code will be stored in the PCM.

It is possible that a trouble code for a monitoredcircuit may not be entered into the PCM/ECMmemory even though a malfunction has occurred.This may happen because one of the trouble codecriteria (arming conditions) has not been met.

The PCM compares input signal voltage fromeach input component to specifications (the estab-lished high and low limits of the range) that arepreprogrammed for that component. If the inputvoltage is not within specifications and other trou-ble code criteria (arming conditions) are met, atrouble code will store in the PCM memory.

The On Board Diagnostics have evolved to thesecond Generation of Diagnostics referred to asOBDII. These OBDII Diagnostics control the func-tions necessary to meet the requirements of Cali-fornia OBDII and Federal OBD regulations. Theserequirements specify the inclusion of a MalfunctionIndicator Light (MIL) located on the instrumentpanel for all 1994 and subsequent model-year pas-senger cars, light duty trucks, and medium-dutyvehicles. The purpose of the MIL is to inform thevehicle operator in the event of the malfunction of

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GENERAL INFORMATION

any emission system or component failures that canaffect emissions and which provide input to, orreceive output from, the PCM.

2003 MIL LAMP STRATEGYI/M Readiness OK to test = Key On Engine OFF

MIL Lamp will remain on until the vehicle isstarted or Ignition is turned off.

I/M not ready for testing = Key On Engine OFF MIL Lamp on solid for (15) seconds then MILLamp will flash on/off for (5) seconds then it willremain on until the vehicle is started or the Ignitionis turned off.

The following table summarizes the variousOBDII monitors operation.

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GENERAL INFORMATION

OBDII Monitor Operation

Comprehensive Major Monitors Major MonitorsComponents Non Fuel Control Fuel Control

Monitor & Non Misfire & Misfire

Run constantly Run Once Per Trip Run constantly

Includes All Engine Hardware Monitors Entire Emission Monitors Entire System

Sensors, Switches, SystemSolenoids, etc.

Most are One Trip Faults Usually Turns On

Most are Two Trip Faults Turns On

Two Trip Faults Turns On

The MIL and Sets DTC After The MIL and Sets DTC After The MIL and Sets DTC After

One Failure Two Consecutive Failures Two Consecutive Failures

Priority 3 Priority 1 or 3 Priority 2 or 4

All Checked For Continuity Done Stop Testing = YesFuel Control Monitor

Open Monitors Fuel Control

Short To Ground Oxygen Sensor Heater System For:

Short To Voltage Oxygen Sensor ResponseFuel System LeanFuel System RichInputs Checked For

Requires 3 ConsecutiveRationality Catalytic Converter

Fuel System Good Trips toEfficiency Except EWMA

Extinguish The MILOutputs Checked For I up to 6 tests per tripFunctionality and a one trip fault (SBEC)

and a two-trip fault on JTEC

EGR SystemMisfire Monitor

Evaporative Emission Monitors For Engine Misfire

System At:

(Purge and Leak) 4 X 1000 RPM Counter(4000 Revs)

Non-LDP (Type B)

or **200 X 3 (600) RPM Counter

LDP (Type A)

Requires 3 Consecutive Requires 3 Consecutive Requires 3 Consecutive

Global Good Trips Global Good Trips Global Good Tripsto Extinguish the MIL* to Extinguish the MIL* To Extinguish the MIL

*40 Warm Up Cycles are required to erase **Type A misfire is a oneDTCs after the MIL has been extinguished. trip failure on pre-1999,

2 Trip failure on 1999 andlater. The MIL will illuminateat the first or second failure,based on MY.

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GENERAL INFORMATION

JTEC CONTROLLED REAR WHEEL DRIVEVEHICLES

The following procedure has been established toassist Dealer Technicians in the field with enablingand running OBD II Monitors. The order listed inthe following procedure is intended to allow thetechnician to effectively complete each monitor andto set the CARB Readiness Status in the least timepossible.

**NOTE**A. Once the monitor run process has begun,do not turn off the ignition. By turning theignition key off, monitor enabling conditionswill be lost.B. By performing a Battery Disconnect, orSelecting Erase DTCs, the CARB Readinessand all additional OBD information will becleared.

Monitor Preliminary Checks:1. Plug scantool into the vehicles DLC.2. Turn the ignition, KEY ON - ENGINE OFF.

Watch for MIL lamp illumination during thebulb check. MIL lamp must have illuminated, ifnot, repair MIL lamp.

3. With the scantool check for any DTCs Verify that No Emissions Related DTCs are

Present and MIL is not illuminated. If an Emissions DTC is Present and the MIL is

ON, the OBD II Monitors may not run and theCARB Readiness will not update.

The Emissions related DTC, which is causingthe MIL, will need to be repaired, thencleared. By clearing DTCs, the OBD Monitorswill need to be run and completed to set theCARB Readiness Status.

Group 25 of the Service Manual can assist indetermining which faults will illuminate theMIL Lamp.

With the scantool check for CARB ReadinessStatus:

Do all the CARB Readiness Status Locations readYES?

YES, then all monitors have been completedand this vehicle is ready to be I/M or EmissionTested.

NO, then the following procedures will aid inrunning and completing all available moni-tors.

MONTIOR RUN PROCESSOutlined below is the Monitor Run Process, in-

cluding suggestions and tips in order to aid in theprocess of meeting the enabling criteria to allow anyof these monitors to run.

NOTE: The most efficient order has beenoutlined below. The first two monitors havevery similar enable criteria. It is possible thatthe Evaporative Leak Detection Monitor willrun during the O2 Sensor Heater Monitor.

1. O2 Sensor Heater MonitorThis monitor requires a cold start, usually anovernight soak or parked for at least 8 hourswithout the engine running. The engine cool-ant temperature must be within 10 degrees ofambient/battery temperature, and the sensedAmbient (outside temperature) must be be-tween approximately 0 F and 100 F. For themonitor run conditions,

2. Evaporative Leak Detection Monitor (Ifthe vehicle is equipped with an LDP sys-tem)This monitor requires a cold start, usually anovernight soak or parked for at least 8 hourswithout the engine running. The engine cool-ant temperature must be within 10 degrees ofambient/battery temperature, and the sensedAmbient (outside) Temperature must be be-tween approximately 40 F and 90 F. For themonitor run conditions select the EVAP LEAKPRE-TEST in the DRB III, OBD II MonitorsMenu.

3. Catalyst MonitorThe vehicle will need to be driven at highwayspeed for a few minutes (approximately 35 to40 mph for 2.5L and 4.0L engines, 50 to 60mph for all others). If the vehicle is equippedwith a manual transmission, using 4th gearmay assist in meeting the monitor runningcriteria. For the monitor run conditions, selectthe CATALYST PRE-TEST in the DRB III,OBD II Monitors Menu.

4. O2 Sensor MonitorThe vehicle will need to be driven for a periodof time (approximately 35 to 40 mph for 2.5Land 4.0L engines, 50 to 60 mph for all others)and brought to a stop for a short period of time(with the Automatic Transmission left inDrive. The O2 Monitor will not run in Park orNeutral on an Automatic Transmissionequipped vehicle). For the monitor run condi-tions, select the O2 SENSOR PRE-TEST inthe DRB III, OBD II Monitors Menu.

5. Purge MonitorThe Purge Free (PF) cells must update on thePURGE FLOW PRE-TEST screen. For theenable conditions, select 9F19 while looking atthe PURGE FLOW PRE-TEST screen. SimilarTest conditions as the O2 Sensor Monitor, that

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GENERAL INFORMATION

is, Normal Operating Temperature, come to astop while leaving the Automatic Transmis-sion in Drive (not Park or Neutral). The PurgeFlow Monitor will attempt to run everyOTHER Throttle Closure. If all of the param-eters are met and it still does not run, withyour foot firmly on the Service Brake, slightly(1/4) open the Throttle and quickly close theThrottle. This will allow the Purge Free up-date to happen, and then the Purge FlowMonitor will Run.

OBDII MONITOR RUN PROCESSNGC VEHICLES

The following procedure has been established toassist Chrysler Dealer Technicians in the field withenabling and running OBD II Monitors. The orderlisted in the following procedure is intended toallow the technician to effectively complete eachmonitor and to set the CARB Readiness Status inthe least time possible.

**NOTE**C. Once the monitor run process has begun,do not turn off the ignition. By turning theignition key off, monitor enabling conditionswill be lost. NVLD Monitor runs after key off.D. By performing a Battery Disconnect, orSelecting Erase DTCs, the CARB Readinessand all additional OBD II information will becleared.

Monitor Preliminary Checks:4. Plug a DRBIIIt into the vehicles DLC.5. Turn the ignition, KEY ON ENGINE OFF.

Watch for MIL lamp illumination during thebulb check. MIL lamp must have illuminated, ifnot, repair MIL lamp.

6. On the DRBIIIt Select #1 DRBIIIt Standalone.7. Select #1 1998-2003 Diagnostics8. Select #1 Engine9. Select #2 DTCs and Related Functions10. Select #1 Read DTCs

Verify that No Emissions Related DTCs arePresent.

If an Emissions DTC is Present, the OBD IIMonitors may not run and the CARB Readi-ness will not update.

The Emissions related DTC, will need to berepaired, then cleared. By clearing DTCs, theOBD Monitors will need to be run and com-pleted to set the CARB Readiness Status.

11. Return to Engine Select Function Menu andSelect #9, OBD II Monitors.

12. Select #3 CARB Readiness Status.

Do all the CARB Readiness Status Locations readYES?*YES, then all monitors have been completed andthis vehicle is ready to be I/M or Emission Tested.*NO, then the following procedure needs to befollowed to run/complete all available monitors.

**NOTE**A. Only the monitors, which are not YES inthe CARB Readiness Status, need to becompleted.B. Specific criteria need to be met for eachmonitor. Each monitor has a Pre-Test screento assist in running the monitor.For additional information, refer to theChrysler Corporation Technical TrainingWorkbook titled On Board Diagnostics:OBDII/EOBD, part number 81-699-01050.C. The most efficient order to run themonitors has been outlined below, includingsuggestions to aid the process.

1. Natural Vacuum Leak Detection withPurge MonitorThis monitor requires a cool down cycle, usu-ally an overnight soak for at least 8 hourswithout the engine running. The ambient tem-perature must decrease overnight parkingthe vehicle outside is advised. To run this testthe fuel level must be between 15-85% full. Forthe monitor run conditions select the EVAPMON PRE-TEST in the DRBIIIt, OBD IIMonitors Menu. The Purge monitor will run ifthe small leak test reports a pass.Criteria for NVLD monitor1) Engine off time greater than @ one hour2) Fuel Level between 15% and 85%3) Start Up ECT and IAT within 10 C (18 F).4) Vehicle started and run until Purge Monitorreports a result.

NOTE: If the vehicle does not report a resultand the conditions where correct. It may takeup to two weeks to fail the small leak monitor.DO NOT use this test to attempt to determinea fault. Use the appropriate serviceinformation procedure for finding a smallleak. If there are no faults and the conditionsare correct this test will run and report apass. Note the Small leak test can find leaksless than 10 thousands of an inch. If a smallleak is present it takes approximately oneweek of normal driving to report a failure.

2. Catalyst / O2 MonitorWith NGC, Catalyst and O2 Monitor informa-tion are acquired and processed at the same

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GENERAL INFORMATION

time. Most vehicles will need to be driven athighway speed (< 50 mph) for a few minutes.Some trucks run the monitor at idle in drive. Ifthe vehicle is equipped with a manual trans-mission, using 4th gear may assist in meetingthe monitor running criteria. For the monitorrun conditions, select the BANK 1 CAT MONPRE-TEST in the DRBIIIt, OBD II MonitorsMenu.

3. EGR MonitorThe EGR monitor now runs in a closed throttledecel or at idle on a warm vehicle. However, itis necessary to maintain the TPS, Map andRPM ranges to allow the monitor to completeitself. For the monitor run conditions, selectthe EGR PRE-TEST in the DRBIIIt, OBD IIMonitors Menu.

4. O2 Sensor Heater MonitorThis monitor is now continuously runningonce the heaters are energized. Pass informa-tion will be processed at power down. For themonitor run conditions, select the O2SHEATER MON PRE-TEST in the DRBIIIt,OBD II Monitors Menu.

3.2.3 TRANSMISSION CONTROLThe 45RFE/545RFE electronic transmission has

a fully adaptive control system. The system per-forms its functions based on continuous real-timesensor feedback information. The control systemautomatically adapts to changes in engine perfor-mance and friction element variations to provideconsistent shift quality. The control system ensuresthat clutch operation during upshifting and down-shifting is more responsive without increasedharshness.

The Powertrain Control Module (PCM) continu-ously checks for electrical problems, mechanicalproblems, and some hydraulic problems. When aproblem is sensed, the PCM stores a diagnostictrouble code (DTC). Some of these codes cause thetransmission to go into limp-in or default mode.The 45RFE/545RFE has three default modes:

(I) Immediate shutdown - The PCM de-energizes the transmission control relay. Thiscauses the transmission system to immediatelydefault to third gear if shift lever is in the Dposition, or 2nd gear if it is in the 2 or Lpositions. Park, Neutral, and Reverse are stillavailable.(O) Orderly Shutdown - If the PCM recognizesa problem that does not require an immediateshutdown, the transmission will maintain thecurrent gear and the transmission control relaywill remain energized until de-energizing it willnot overspeed the engine. When the vehicle speed

reaches a reasonable level the PCM de-energizesthe transmission control relay. This causes thetransmission system to immediately defualt tothird gear if shift lever is in the D position, or2nd gear if it is in the 2 or L positions. Park,Neutral, and Reverse are still available.(L) Logical Shutdown with Recovery - ThePCM does not de-energize the Transmission Con-trol Relay. Instead, the transmission will utilize1st and 3rd gears while in D, and will use 2ndwhile in 2 or L. All transmission operations inthis mode will be at a preset line pressure (openloop). The transmission will resume normal oper-ation (recover) if the detected problem goes away.Three recoveries are permitted in a given key,after the fourth occurrence the operation de-scribed above will be maintained.Once the DRBIII is in the EATX portion of the

diagnostic program, it constantly monitors thePCM to see if the system is in limp-in mode. If thetransmission is in limp-in mode, the DRBIIIt willflash the red LED.

3.2.3.1 TRANSMISSION OPERATION ANDSHIFT SCHEDULING AT VARIOUSOIL TEMPERATURES

The transmission covered in this manual hasunique shift schedules depending on the tempera-ture of the transmission oil. The shift schedule ismodified to extend the life of the transmission whileoperating under extreme conditions.

The oil temperature is measured with a Temper-ature Sensor on the 45RFE/545RFE transmission.The Temperature Sensor is an integral componentof the Transmission Range Sensor (TRS). If theTemperature Sensor is faulty the transmission willdefault to a calculated oil temperature. Oil tem-perature will then be calculated using engine cool-ant temperature, battery/ambient temperature,and engine off time from the Body Control Module(BCM). These inputs are received from the commu-nication bus periodically and are used to initializethe oil temperature at start up. Once the engine isstarted, the PCM updates the transmission oiltemperature based on torque converter slip speed,vehicle speed, gear, and engine coolant temperatureto determine an estimated oil temperature duringvehicle operation. Vehicles using calculated oiltemperature track oil temperature reasonably ac-curately during normal operation. However, if atransmission is overfilled, a transmission oil coolerbecomes restricted, or if a customer drives aggres-sively in low gear, the calculated oil temperaturewill be inaccurate. Consequently the shift scheduleselected may be inappropriate for the current con-ditions.

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GENERAL INFORMATION

3.2.3.2 LINE PRESSURE CONTROLProper control of the transmission line pressure

is essential for proper operation. The 45RFE/545RFE normally uses closed loop line pressurecontrol, where actual line pressure (reported by theline pressure sensor) is continuously monitored.The PCM determines the desired (target) line pres-sure which is required, and adjusts the PressureControl Solenoid (PCS) until the actual line pres-sure matches the desired line pressure value. In theevent of a line pressure sensor failure DTCP0932(CA), the PCM changes to an open loop con-trol at an essentially constant line pressure.

Proper diagnosis of line pressure systems is facil-itated by the use of a special tool (T-fitting - Miller#8259) which allows the use of a mechanical pres-sure gauge to compare the line pressure sensorreading on the DRBIIIt to the gauge pressure.Technicians should compare the mechanical gaugereading with the actual and desired line pres-sure reading on the DRBIIIt. All three readingsshould closely match in pressure. Because the me-chanical and actual line pressure may not matchthe desired at low engine speeds (due to low pumpoutput RPM), line pressure should always bechecked at 1500 - 2000 RPM.Typical Line Pressure problems include: Mechanical and actual readings both less than

desired If the mechanical and actual readings do not

increase significantly as engine speed is raisedabove 2000 RPM, the pressure control solenoidis usually at fault. The pressure control sole-noid is usually accompanied by DTCsP0867(C8) and P0868(C9). The PCS is locatedin the Transmission Solenoid/TRS assembly.

If the mechanical and actual readings varywith engine speed (above 2000 RPM), the faultis often a sticking main regulator valve. Thisvalve is located in the transmission pumpassembly.

Actual reading on the DRBIIIt differs from theMechanical Pressure reading (higher or lower) bymore than 69kPa (10 PSI). This is sometimesaccompanied by a DTC P0869(CB). The fault isusually in the Line Pressure Sensor or the LinePressure Sensor Wiring.

All three readings match, but the actual read-ing exhibits momentary intermittent pressureincreases to 1724 kPa (250 PSI). The line Pres-sure Sensor is usually the problem. This willcause erratic shift quality (particularly a harsh3-1 coast down shift), repair by replacing the LinePressure Sensor.

3.2.3.3 DRIVE LEARN PROCEDUREProcedure to Learn A Smooth 1st Neutral ToDrive Shift:

Perform this procedure only if the complaint is fora delayed or harsh shift the first time the transmis-sion is put into gear after the vehicle is allowed toset with the engine not running for at least 10minutes. Use the following steps to have the PCMlearn the 1st

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TABLE OF CONTENTS - autocats.ws · table of contents - continued 6.0 acronyms .....27 6.2 definitions ... p0463-fuel level sending unit voltage too high