Yanmar TNV Troubleshooting Electronic Control 0DTNV-G00600 Troubleshooting Manual

0DTNV-G00600PRINTED IN JAPAN

ELECTRONIC CONTROL

TROUBLESHOOTINGMANUAL

TROUBLESHO

OTING

MANUA

L

3TNV82A

3TNV82A-B

3TNV84

3TNV84T

3TNV84T-B

3TNV88

3TNV88-B

3TNV88-U

4TNV84

4TNV84T

4TNV84T-Z

4TNV88

4TNV88-B

4TNV88-U

4TNV94L

4TNV98

4TNV98-Z

4TNV98-E

4TNV98T

4TNV98T-Z

4TNV106

4TNV106T

mcrichaTypewritten TextGehl Form No. 50950006, AP1210

CaliforniaProposition 65 Warning

Diesel engine exhaust and some of itsconstituents are known to the state ofCalifornia to cause cancer, birthdefects, and other reproductive harm.

CaliforniaProposition 65 Warning

Battery posts, terminals, and relatedaccessories contain lead and leadcompounds, chemicals known to thestate of California to cause cancer andreproductive harm.Wash hands after handling.

Head Office:Yanmar Co., Ltd.

1-32 Chayamachi, Kita-ku, Osaka 530-8311, Japanhttp://www.yanmar.co.jp

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Buffalo Grove, IL 60089-4508, U.S.A.TEL: 1-847-541-1900 FAX: 1-847-541-2161

http://www.yanmar.com

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The Netherlands.TEL: 31-36-5493200 FAX: 31-36-5493209

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Yanmar Asia (Singapore) Corporation Pte. Ltd.4 Tuas Lane, Singapore 638613

TEL: 65-68615077 FAX: 65-68611509http://www.yanmar.co.jp/yasc/

TNV DI Servic

TNV DI Service Manual Section 1

FAILURE DIAGNOSISPage

DTCs (Diagnostic Trouble Codes) General Description.................. 1-3DTC Code List ........................................................................... 1-3Description Items....................................................................... 1-7Analog Input Related Failures ................................................... 1-8Pulse Sensor Related Failures ................................................ 1-60Contact Output Related Failures ............................................. 1-66Contact Input Related Failures .............................................. 1-100Actuators etc.......................................................................... 1-114E-ECU Internal and Communication Errors........................... 1-122

Method anDescripAnalogPulse SContacContacActuatoECU InFAILUR

Using the FFlashin

Factor Ana2G-Typ2G-TypStalling2G-Typ

Special SeTroublesho

CompreQuick Refe

TNV_DI_SM_A4-Troubleshooting.book 1 1-1e Manual

d Procedure of Failure Diagnosis ............................... 1-133tion Items................................................................... 1-133

Input Related Failures ............................................... 1-136ensor Related Failures .............................................. 1-164

t Output Related Failures ........................................... 1-170t Input Related Failures .............................................. 1-187r Related Failures ...................................................... 1-193ternal and Communication Errors .............................. 1-197E INDICATOR LAMP FLASHING PATTERN........... 1-207ailure Indicator for Failure Diagnosis ........................ 1-208g Patterns of the Failure Indicator.............................. 1-208lysis............................................................................ 1-210e Eco-Governor Speed-Fluctuation Factor Analysis . 1-210e Eco-Governor Engine /Start-Up Inability Factor Analysis.............................. 1-213e Eco-Governor Black Smoke Factor Analysis.......... 1-216rvice Tools.................................................................. 1-218oting By Measuring Compression Pressure .............. 1-219ssion Pressure Measurement Method...................... 1-219rence Table For Troubleshooting .............................. 1-222

FAILURE DIAGNOSIS

1-2

T

TNV_DI_SM_A4-Troubleshooting.book 2 TNV DI Service Manual

his Page Intentionally Left Blank

FAILURE DIAGNOSIS

TNV DI Servic

DTCs (Diagnostic Trouble Codes) General Description

DTCS (DIAGNOSTIC TROUBLE CODES) GENERAL DESCRIPTIONDTC Code List

Classification

DTCLamp

Flashing Patterns

Error Item Referenced page number

Area Status Overview Failure Diagnosis

Ana

log

Inpu

t Rel

ated

Fai

lure

s

P1202/47 Rack position sensor

Error (low voltage) P.1-8P.1-136

P1203/3 Error (high voltage) P.1-10P0122/4

5 Accelerator sensor

Error (low voltage) P.1-12P.1-140P1203/3 Error (high voltage) P.1-14

P0124/2 Intermittent failure P.1-16P1125/1 Error (foot pedal-close position) P.1-18

P.1-144P1126/0 Error (foot pedal-open position) P.1-20P0222/4

1-8 Spare accelerator sensor

Error (low voltage) P.1-22P.1-148P0223/3 Error (high voltage) P.1-24

P0224/2 Intermittent failure P.1-26P1225/1 Error (foot pedal-close position) P.1-28

P.1-144P1226/0 Error (foot pedal-open position) P.1-30P1227/8 Error (pulse communication) P.1-32 P.1-152P0222/4

1-9 Atse

P0223/3P0224/2P0668/4

4-1 ECSeP0669/3P1644/2

P0634/0 2-5 ECAlP0117/4

4 CteP0118/3P0119/2

P0217/0 3-6 CTeP0642/4

2-4 SEP0643/3P1644/2P0562/1

2-3 PoP0563/0

TNV_DI_SM_A4-Troubleshooting.book 3 e Manual 1-3

mospheric pressure nsor

Error (low voltage) P.1-34P.1-148Error (high voltage) P.1-36

Intermittent failure P.1-38

U Temperature nsor

Error (low voltage) P.1-40P.1-154Error (high voltage) P.1-41

Intermittent failure P.1-42U Temperature Rise

arm P.1-43 P.1-154

ooling water mperature sensor

Error (Low Voltage) P.1-45P.1-156Error (High Voltage) P.1-47

Intermittent failure P.1-49ooling Water mperature Rise Alarm P.1-51 P.1-156

NSOR 5VError (low voltage) P.1-53

P.1-160Error (High Voltage) P.1-54Intermittent failure P.1-55

wer supply VoltageError (Low Voltage) P.1-56 P.1-56Error (High Voltage) P.1-58 P.1-58

FAILURE DIAGNOSIS

1-4

DTCs (Diagnostic Trouble Codes) General DescriptionPu

lse

Sen

sors P0340/4 6 Speed Sensor Error P.1-60 P.1-164

P1340/4 1-1 Spare speed sensor Error P.1-62 P.1-167

P0219/0 9 Overspeed Error P.1-64 P.1-64

Cont

act O

utpu

t Rel

ated

Fa

ilure

s

P1222/41-7 Rack actuator Relay

Error A P.1-66P.1-170P1223/3 Error B P.1-68

P1224/2 Intermittent failure P.1-70P1232/4

1-5 Start Assist RelayError A P.1-72

P.1-174P1233/3 Error B P.1-74P1234/2 Intermittent failure P.1-76P1242/4

1-4 CSD solenoid valveError A P.1-78

P.1-178P1243/3 Error B P.1-80P1244/2 Intermittent failure P.1-82P1402/4

1-3 EG

Error A (Step Motor A-Phase) P.1-84P1403/3 Error B (Step Motor A-Phase) P.1-86P1412/4P1413/3P1422/4P1423/3P1432/4P1433/3

Cont

act I

npu

t Rel

ate

d Fa

ilure

s P1192/4 2-1 OP1198/1 3-1 OP1562/4 2-2 CP1568/1 3-2 CP1217/0 3-3 AbP1101/0 3-4 Ai

P1151/0 3-5 O

Classification

DTCLamp

Flashing Patterns




R valve P.1-182

Error A (Step Motor B-Phase) P.1-88Error B (Step Motor B-Phase) P.1-90Error A (Step Motor C-Phase) P.1-92Error B (Step Motor C-Phase) P.1-94Error A (Step Motor D-Phase) P.1-96Error B (Step Motor D-Phase) P.1-98

il pressure switch Error P.1-100

P.1-187

il Pressure Descend Error P.1-102harge switch Error P.1-104harge Alarm P.1-106normal Water Temperature P.1-108

r cleaner Clogging Alarm P.1-110

il-water separator Alarm P.1-112

FAILURE DIAGNOSIS

TNV DI Servic


Actu

ator

Erro

rs P1212/4

8Rack actuator

Error (low current) P.1-114

P.1-193P1213/3 Error (high current) P.1-116P1211/7 Mechanical failure P.1-118

P1214/2 Engine Error P.1-120

ECU

insid

e a

nd

Com

mun

icat

ion

Rel

ated

Fa

ilure

s P0605/12

4-1 ECU Internal

Flash ROMError (Checksum A)

P.1-122

P.1-197

P1605/2 Error (Checksum B)P1606/2 Error (Checksum C)P1620/12 Map format ErrorP1601/2

EEPROMError (Checksum)

P0601/12 Error (read/write error)

P.1-123P1610/12

Sub CPUError A

P1611/12 Error BP1612/12 Error CP0686/4 1-6 Main relay Error P.1-124 P.1-199

U0001/12 1-2 CAN Communication Error P.1-126 P.1-203U0167/12

4-2 ImU1167/8

U0426/2

Classification

DTCLamp

Flashing Patterns




mobilizer

Error (CAN communication) P.1-128

P.1-205Error (pulse communication) P.1-130

Error (System) P.1-132

FAILURE DIAGNOSIS

1-6


T


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FAILURE DIAGNOSIS

TNV DI Servic


Description Items

DTC Detecting Conditions

Movement at Error occurrence

Estimation of Failure cause/EProvides descriptive information owire), or possible system abnormatemperature), as can be estimated

Note: Indicates failures th

Diagnosis DescriptionDescribes methods or procedures

* After sucessful recovery bythe previous parts will repro

DTC Code Number DTC Name

1 - Precondition; 2 - Detecting condition(s); 3 - Flashing pattern of failure indicator Check points

1. Precondition for Error detection2. Error detecting Condition3. Indicates the pattern in which the failure lamp flashes when the

DTC is output. (For detailed information on various flashing patterns, see Annex).

This column shows what parts or items should be checked to identify the cause of the error.For details, see "."

Error Mode [Operation Continuation] / [Run Under Restrictions] / [Stop Immediately]:The engine operation after detecting the error is described.

*

[Operation Continuation]:After detecting the error, the system lets the engine continue to run without any restrictions.

[Run Under Restrictions]:The system lets the engine continue to run but restricts the High idle speed, engine power, and/or other performance

[Stop Imme

Run restricted? Yes/No.: If oc

Recovery Conditions

Yes/No.: If to

Remarks This field d


rror conditionn possible points of failure, possible direct causes (such as a disconnected sensorlities that has indirectly caused the failure (such as abnormally high cooling waterfrom the output DTC.

at might be related with the output DTC.

of failure diagnosis.

the replacement of ECU, sensor or actuator, make sure that installing duce the same error.

factors as appropriate.diately]: The system stops the engine immediately after detecting the

error.When any error is detected before starting the engine, the starter will not rotate.

Yes, this field details how the engine run is restricted when the error has curred.Yes, this field describes what conditions must be true for the error mode be reset.escribes some notes on safety precautions and so on, as appropriate.

FAILURE DIAGNOSIS

1-8


Analog Input Related FailuresRack position sensor(1) P1202/4: Failure with Rack Position Sensor (Low Voltage)



Estimation of Failure cause/E The connector may not be pro Wiring defect of the harness

The rack position sensor's The SENSOR 12V wire ma The SENSOR GND wire m*NOTE) If the SENSOR 12V w

POWER SUPPLY, theE-ECU may fail to de

The rack position sensor may b

Output defect of the rack po The E-ECU internal circuitry m

DTC P1202/4 Rack Position Sensor Error (Low Voltage)


1. Key switch ON.2. The sensor voltage lower limit and below [at E-ECU activation,

engine running]3. Seven flashes.

ConnectorHarnessRack position sensorE-ECU

Error Mode [Run Under Restrictions]:The engine continues to run in on-error engine control mode.If any error is detected at E-ECU activation, it takes 1 - 10 seconds from the starter begins to rotate until the engine starts.

Run restricted? Yes: The High idle speed is restricted to one of the following, whichever smaller: 80 15

The Recovery Conditions

No.

Remarks The High aspecificatio


rror conditionperly connected.

signal wires may be disconnected or short-circuited with GND.y be disconnected or short-circuited with GND (*NOTE).ay be short-circuited with POWER SUPPLY (*NOTE).ire is short-circuited with GND or SENSOR GND wire is short-circuited with

E-ECU's power supply line fuse 10A might be blown.With this fuse blown, thetect/indicate the error, and to store the error history.

e faulty.

sition signal by a disconnection or a short circuit of the inner wiringay be faulty.

% of the pre-error High idle speed0% of the Low idle speedfuel injection rate is restricted.

nd Low idle speeds must be equal to those specified in the engine ns.

FAILURE DIAGNOSIS

TNV DI Servic

DTCs (Diagnostic Trouble Codes) General DescriptionDiagnosis Description

1) Initial diagnosis with the diagnosis tool

Check the fault indication. Check the sensor voltage (AD value).

*For details of the method and the procedure of diagnosis, see P.1-136

2) Check of connectors/wiring

Before beginning your work, be sure to turn off the key switch. Check that the connector of the rack actuator is correctly inserted. Check that the wiring of the rack actuator is not disconnected or the insulation

of the wiring is not peeled.

3) Failure Diagnostic Work

Check the input voltage of the rack position sensor (voltage of the sensor 12V line).

Check the harness for correct continuity.

*For de


tails of the method and the procedure of diagnosis, see P.1-136

FAILURE DIAGNOSIS

1-10

DTCs (Diagnostic Trouble Codes) General Description(2) P1203/3: Failure with Rack Position Sensor (High Voltage)




The SENSOR GND wire m The rack position sensor si The rack actuator wiring ma

The rack position sensor may Output defect of the rack po

The rack actuator may be fau The rack actuator inner wir

The E-ECU internal circuitry m

DTC P1202/3 Failure with Rack Position Sensor (High Voltage)


1. Key switch ON.2. The sensor voltage upper limit and above [at E-ECU activation,

engine running]3. Seven flashes.

ConnectorHarness rack position sensorRack actuatorE-ECU

Detection at the engine start Detection at the engine runningError Mode [Run Under Restrictions]:

Start the engine in on-error engine control mode.It takes 1 to 10 seconds from the starters rotation to the engine start.

[Stop Immediately]:The engine stops running.

Run restricted? Yes: The High idle is restricted to one of the following, whichever smaller: 80% of the pre-error High idle speed 150%

The fu

Yes: The rack actuator relay is turned OFF, and the rack position is forcibly set to the engine stop position.

Recovery Conditions

No.

Remarks The High anequal to thosspecification



ay be disconnected.gnal wire may be short-circuited with POWER SUPPLY.y be short-circuited with GND (with engine running).

be faulty.sition signal by a disconnection or a short circuit of the inner wiring

lty.ing may be short-circuited with GND (with engine running).

ay be faulty.

of the Low idle speedel injection rate is restricted.

No.

d Low idle speeds must be e specified in the engine s.

FAILURE DIAGNOSIS

TNV DI Servic



Check the fault indication. Check the sensor voltage (AD value).



Before beginning your work, be sure to turn off the key switch. Check that the connector of the rack actuator is correctly inserted. Check that the wiring of the rack actuator is not disconnected or the insulation



Check the input voltage of the rack position sensor (voltage of the sensor 12V line).


*For de



FAILURE DIAGNOSIS

1-12

DTCs (Diagnostic Trouble Codes) General DescriptionAccelerator sensor

(1) P0122/4: Accelerator Sensor Error (Low Voltage)




The accelerator sensor's si The SENSOR 5V wire may The SENSOR GND wire m*NOTE) If the SENSOR GND w

10A might be blown.Wthe error history.

The accelerator sensor may b Sensor output defect by a dincrease


DTC P0122/4 Accelerator Sensor Error (Low Voltage)


1. Key switch ON.2. Sensor voltage 0.2 [V] or lower.3. Five flashes.

HarnessAccelerator sensor

Spare Accelerator Sensor FunctionUnavailable Available

Error Mode [Run Under Restrictions]:The engine runs at a constant rotational speed.

[Stop Immediately]:The engine continues to run using the spare accelerator sensor instead.

Run restricted? Yes: The target speed is set to the "on-error target speed (standard value: 1500[min-1])" or pre-error target speed

No.

Recovery Conditions

Yes: This ewhen 4.6[V]

Remarks



gnal wires may be disconnected or short-circuited with GND. be disconnected or short-circuited with GND.ay be short-circuited with POWER SUPPLY (*NOTE).ire is short-circuited with POWER SUPPLY, the E-ECU's power supply line fuseith this fuse blown, the E-ECU may fail to detect/indicate the error, and to store

e faulty.isconnection of the accelerator sensor inner wiring or a sliding resistance

ay be faulty.

.rror will be automatically reset a normal voltage (0.2 to ) is input.

Yes: This error will be automatically reset when a normal voltage (0.2 to 4.6[V]) is input.

FAILURE DIAGNOSIS

TNV DI Servic



Check the fault indication. Check the sensor voltage.



Before beginning your work, be sure to turn off the key switch. Check that the connector of the accelerator sensor is correctly inserted. Check that the wiring of the accelerator sensor is not disconnected or the

insulation of the wiring is not peeled.


Check the resistance value of the accelerator sensor. Check the harness for correct continuity. Check the output voltage of the accelerator sensor.

*For de



FAILURE DIAGNOSIS

1-14

DTCs (Diagnostic Trouble Codes) General Description(2) P0123/3: Accelerator Sensor Error (High Voltage)




The SENSOR GND wire m The sensor signal wire may

The accelerator sensor may b Sensor output defect by a s


DTC P0123/3 Accelerator Sensor Error (High Voltage)


1. Key switch ON.2. Sensor voltage 4.6 [V] or higher.3. Five flashes.

HarnessAccelerator sensor

Spare Accelerator Sensor FunctionUnavailable Available


[Stop Immediately]:The engine continues to run using the spare accelerator sensor instead.

Run restricted? Yes: The target speed is set to the "on-error target speed (standard value: 1500[min-1])" or pre-error target speed.

No.

Recovery Conditions


Remarks



ay be disconnected. be short-circuited with POWER SUPPLY.e faulty.hort circuit with power supply of the accelerator sensor inner wiringay be faulty.

rror will be automatically reset a normal voltage (0.2 to ) is input.


FAILURE DIAGNOSIS

TNV DI Servic










*For de



FAILURE DIAGNOSIS

1-16

DTCs (Diagnostic Trouble Codes) General Description(3) P0124/2: Intermittent Failure with Accelerator Sensor



Estimation of Failure cause/Error condition The connector may not be properly connected. Wiring defect of the harness

Accelerator sensor signal w Sensor 5V wire may be dis Sensor GND wire may be d

The accelerator sensor may b Inner wiring may be discon

DTC P0124/2 Intermittent Failure with Accelerator Sensor


1. Engine running.2. Unconfirmed error detected 10 times.3: Does not flash.

ConnectorHarnessAccelerator sensor

Error Mode [Run Under Restrictions]:After detecting the error, the system lets the engine continue to run without any restrictions.

Run restricted? No.Recovery Conditions

No.

Remarks


ire may be disconnected, or short-circuited with GND or power supply.connected, or short-circuited with GND or power supply.isconnected.e faulty.nected or short-circuited

FAILURE DIAGNOSIS

TNV DI Servic










*For de



FAILURE DIAGNOSIS

1-18

DTCs (Diagnostic Trouble Codes) General Description(4) P0123/1: Accelerator Sensor Error (foot pedal-close position)




The wiring for the foot peda The wiring for the foot peda

The foot pedal may be faulty. The foot pedal inner wiring


DTC P1125/1 Accelerator Sensor Error (foot pedal-close position)


1. Key switch ON.2. With sensor voltage at or below 0.65[V], foot pedal Normally

Open switch detected being ON or foot pedal Normally Closed Switch detected being OFF.

3. Five flashes.

HarnessFoot pedal



Recovery Conditions

No.

Remarks



l Normally Closed switch may be disconnected.l Normally Open switch may be short-circuited with GND.

may be disconnected or short-circuited with GND.ay be faulty.

FAILURE DIAGNOSIS

TNV DI Servic



Check the fault indication. Check that the foot pedal movement is correctly recognized.



Before beginning your work, be sure to turn off the key switch. Check that the connector of the foot pedal is correctly inserted. Check that the wiring of the foot pedal is not disconnected or the insulation of

the wiring is not peeled.


Check the foot pedal for correct continuity. Check the harness for correct continuity.



FAILURE DIAGNOSIS

1-20

DTCs (Diagnostic Trouble Codes) General Description(5) P1126/0: Accelerator Sensor Error (foot pedal-open position)





The foot pedal may be faulty. The inner wiring may be dis


DTC P1126/0 Accelerator Sensor Error (foot pedal-open position)


1. Key switch ON.2. With sensor voltage 1.1[V] and above, foot pedal Normally Open

switch detected being OFF or foot pedal Normally Closed Switch detected being ON.

3. Five flashes.

HarnessFoot pedal



Recovery Conditions

No.

Remarks



l Normally Open switch may be disconnected.l Normally Closed switch may be short-circuited with GND.

connected or short-circuited with GND.ay be faulty.

FAILURE DIAGNOSIS

TNV DI Servic












FAILURE DIAGNOSIS

1-22

DTCs (Diagnostic Trouble Codes) General DescriptionSpare accelerator sensor (option)(1) P0222/4: Failure with Spare Accelerator Sensor (Low Voltage)




The spare accelerator sens The SENSOR 5V wire may The SENSOR GND wire m*NOTE) If the SENSOR GND w


The spare accelerator sensor Sensor output defect by a dresistance increase


DTC P0222/4 Failure with Spare Accelerator Sensor (Low Voltage)


1. Key switch ON.2. Sensor voltage 0.2 [V] or lower.3. One flash followed by eight flashes

HarnessSpare accelerator sensor

Error detection of main accelerator sensorUnavailable Available

Error Mode [Run As Is]:The engine continues to run using the main accelerator sensor.

[Run Under Restrictions]:The engine runs at a constant rotational speed.

Run restricted? No. Yes: The target speed is set to the "on-error target speed (standard value: 1500[min-1])" or pre-error target

Recovery Conditions


Remarks



or's signal wires may be disconnected or short-circuited with GND. be disconnected or short-circuited with GND.ay be short-circuited with POWER SUPPLY (*NOTE).ire is short-circuited with POWER SUPPLY, the E-ECU's power supply line fuseith this fuse blown, the E-ECU may fail to detect/indicate the error, and to store

may be faulty.isconnection of the spare accelerator sensor inner wiring or a sliding

ay be faulty.

speed.rror will be automatically reset a normal voltage (0.2 to ) is input.


FAILURE DIAGNOSIS

TNV DI Servic






Before beginning your work, be sure to turn off the key switch. Check that the connector of the spare accelerator sensor is correctly inserted. Check that the wiring of the spare accelerator sensor is not disconnected or the



Check the resistance value of the spare accelerator sensor. Check the harness for correct continuity. Check the output voltage of the spare accelerator sensor.

*For de



FAILURE DIAGNOSIS

1-24

DTCs (Diagnostic Trouble Codes) General Description(2) P0223/3: Spare Accelerator Sensor Error (High Voltage)





The spare accelerator sensor Sensor output defect by a s


DTC P0223/3 Spare Accelerator Sensor Error (High Voltage)


1. Key switch ON.2. Sensor voltage 4.6 [V] or higher.3. One flash followed by eight flashes

HarnessSpare accelerator sensor




Run restricted? No. Yes: The target speed is set to the "on-error target speed (standard value: 1500[min-1])" or pre-error target speed.

Recovery Conditions


Remarks



ay be disconnected. be short-circuited with POWER SUPPLY. may be faulty.hort circuit with power supply of the spare accelerator sensor inner wiringay be faulty.

rror will be automatically reset a normal voltage (0.2 to ) is input.


FAILURE DIAGNOSIS

TNV DI Servic










*For de



FAILURE DIAGNOSIS

1-26

DTCs (Diagnostic Trouble Codes) General Description(3) P0224/2: Intermittent Failure with Spare Accelerator Sensor




Spare accelerator sensor s Sensor 5V wire may be dis Sensor GND wire may be d

The spare accelerator sensor Spare accelerator sensor w

DTC P0224/2 Intermittent Failure with Spare Accelerator Sensor



ConnectorHarnessSpare accelerator sensor

Error Mode [Run As Is]:After detecting the error, the system lets the engine continue to run without any restrictions.


No.

Remarks


ignal wire may be disconnected or short-circuited with GND or power supply.connected, or short-circuited with GND or power supply.isconnected. may be faulty.iring may be disconnected or short-circuited.

FAILURE DIAGNOSIS

TNV DI Servic










*For de



FAILURE DIAGNOSIS

1-28

DTCs (Diagnostic Trouble Codes) General Description(4) P1225/1: Spare Accelerator Sensor Error (foot pedal-close position)







DTC P1225/1 Spare Accelerator Sensor Error (foot pedal-close position)


1. Key switch ON.2. With sensor voltage at or below 0.65[V], foot pedal Normally

Open switch detected being ON or foot pedal Normally Closed Switch detected being OFF.

3. One flash followed by eight flashes

HarnessFoot pedal




Run restricted? No. Yes: The target speed is set to the "on-error target speed (standard value:

Recovery Conditions

No.

Remarks



l Normally Closed switch may be disconnected.l Normally Open switch may be short-circuited with GND.


1500[min-1])" or pre-error target speed.

No.

FAILURE DIAGNOSIS

TNV DI Servic












FAILURE DIAGNOSIS

1-30

DTCs (Diagnostic Trouble Codes) General Description(5) P1226/0: Spare Accelerator Sensor Error (foot pedal-open position)







DTC P1226/0 Spare Accelerator Sensor Error (foot pedal-open position)


1. Key switch ON.2. With sensor voltage 1.1[V] and above, foot pedal Normally Open

switch detected being OFF or foot pedal Normally Closed Switch detected being ON.

3. One flash followed by eight flashes

HarnessFoot pedal





Recovery Conditions

No.

Remarks



l Normally Open switch may be disconnected.l Normally Closed switch may be short-circuited with GND.



No.

FAILURE DIAGNOSIS

TNV DI Servic












FAILURE DIAGNOSIS

1-32

DTCs (Diagnostic Trouble Codes) General Description(6) P1227/8: Failure with Spare Accelerator Sensor (Pulse Communication)

* This DTC is output when a pulse accelerator is used.



Estimation of Failure cause/E Wiring defect of the harness

The pulse accelerator's sig Source circuitry fault of the pu The E-ECU internal circuitry m

DTC P1227/8 Failure with Spare Accelerator Sensor (Pulse Communication)


1. Key switch ON.2. No pulse accelerator signal input3. One flash followed by eight flashes

Harness

CAN communication error detectionUnavailable Available




Recovery Conditions

Yes: The ewhen

Remarks


rror condition

nal wires may be disconnected or short-circuited with GND.lse accelerator signalay be faulty.


rror is automatically reset a normal data is received.

Yes: The error is automatically reset when a normal data is received.

FAILURE DIAGNOSIS

TNV DI Servic



Check the fault indication.



Before beginning your work, be sure to turn off the key switch. Check that a source unit of the pulse accelerator signal and ECU are correctly

connected. Check that the wiring of the pulse accelerator signal is not disconnected or the






FAILURE DIAGNOSIS

1-34

DTCs (Diagnostic Trouble Codes) General DescriptionAtmospheric pressure sensor (option)(1) P2228/4: Failure with Atmospheric Pressure Sensor (Low Voltage)




The atmospheric pressure The SENSOR 5V wire may The SENSOR GND wire m*NOTE) If the SENSOR GND w


The atmospheric pressure se Sensor output defect by a dresistance increase


DTC P2228/4 Failure with Atmospheric Pressure Sensor (Low Voltage)


1. Key switch ON.2. Sensor voltage 0.2 [V] or higher.3. One flash followed by nine flashes.

HarnessAtmospheric pressure sensor

Error Mode [Run Under Restrictions]:The engine continues to run with the atmospheric pressure unchanged from the pre-error value.

Run restricted? Yes: The altitude compensation function is disabled.Recovery Conditions

No.

Remarks



sensor's signal wires may be disconnected or short-circuited with GND. be disconnected or short-circuited with GND.ay be short-circuited with POWER SUPPLY (*NOTE).ire is short-circuited with POWER SUPPLY, the E-ECU's power supply line fuseith this fuse blown, the E-ECU may fail to detect/indicate the error, and to store

nsor may be faulty.isconnection of the atmospheric pressure sensor inner wiring or a sliding

ay be faulty.

FAILURE DIAGNOSIS

TNV DI Servic






Before beginning your work, be sure to turn off the key switch. Check that the connector of the atmospheric pressure sensor is correctly

inserted. Check that the wiring of the atmospheric pressure sensor is not disconnected

or the insulation of the wiring is not peeled.


Check the resistance value of the atmospheric pressure sensor. Check the harness for correct continuity. Check the output voltage of the atmospheric pressure sensor.

*For de



FAILURE DIAGNOSIS

1-36

DTCs (Diagnostic Trouble Codes) General Description(2) P2229/3: Failure with Atmospheric Pressure Sensor (High Voltage)





The atmospheric pressure se Sensor output defect by a s


DTC P2229/3 Failure with Atmospheric Pressure Sensor (High Voltage)


1. Key switch ON.2. Sensor voltage 4.8 [V] or higher.3. One flash followed by nine flashes.

HarnessAtmospheric pressure sensor

Error Mode [Run Under Restrictions]:The engine continues to run with the atmospheric pressure unchanged from the pre-error value.

Run restricted? Yes: The altitude compensation function is disabled.Recovery Conditions

No.

Remarks


ay be disconnected. be short-circuited with POWER SUPPLY.nsor may be faulty.hort circuit with power supply of the atmospheric pressure sensor inner wiring

ay be faulty.

FAILURE DIAGNOSIS

TNV DI Servic











*For de



FAILURE DIAGNOSIS

1-38

DTCs (Diagnostic Trouble Codes) General Description(3) P2230/2: Intermittent Failure with Atmospheric Pressure Sensor




Accelerator sensor signal w Sensor 5V wire may be dis Sensor GND wire may be d

The atmospheric pressure se Inner wiring of atmospheric

DTC P2230/2 Intermittent Failure with Atmospheric Pressure Sensor



ConnectorHarnessAtmospheric pressure sensor



No.

Remarks


ire may be disconnected, or short-circuited with GND or power supply.connected, or short-circuited with GND or power supply.isconnected.nsor may be faulty. pressure sensor may be disconnected, or short circuited.

FAILURE DIAGNOSIS

TNV DI Servic











*For de



FAILURE DIAGNOSIS

1-40

DTCs (Diagnostic Trouble Codes) General DescriptionECU Temperature Sensor(1) P0668/4: Failure with ECU Temperature Sensor (Low Voltage)



Estimation of Failure cause/Error condition The E-ECU internal circuitry m

Diagnosis Description

DTC P0668/4 Failure with ECU Temperature Sensor (Low Voltage)


1. Key switch ON.2. Sensor voltage 1.0 [V] (at 140C) or lower.3. Four flashes followed by one flash.

E-ECU

Error Mode [Operation Continuation]: No obstacles to control the engine.The engine continues to run with the ECU temperature set to the default of 30[C].


Yes: This error will be automatically reset when a normal sensor voltage (1.0 to 4.6[V]) is input.

Remarks


Chec Chec

*For de


ay be faulty.

k the fault indication.k the ECU temperature.


FAILURE DIAGNOSIS

TNV DI Servic

DTCs (Diagnostic Trouble Codes) General Description(2) P0669/3: Failure with ECU Temperature Sensor (High Voltage)



Estimation of Failure cause/Error condition The E-ECU internal circuitry may be faulty.


DTC P0669/3 Failure with ECU Temperature Sensor (High Voltage)


1. Key switch ON.2. Sensor voltage 4.6 [V] (at -45C) or lower.3. Four flashes followed by one flash.

E-ECU

Error Mode [Operation Continuation]: No obstacles to control the engine.The engine continues to run with the ECU temperature set to the default of 30 [C].


Yes: This error will be automatically reset when a normal sensor voltage (0.2 to 4.6[V]) is input.

Remarks


Chec Chec

*For de




FAILURE DIAGNOSIS

1-42

DTCs (Diagnostic Trouble Codes) General Description(3) P1664/2: Intermittent Failure with ECU Temperature Sensor



Estimation of Failure cause/Error condition The E-ECU internal circuitry may be faulty.


DTC P1664/2 Intermittent Failure WITH ECU Temperature Sensor



E-ECU



No.

Remarks


Chec Chec

*For de




FAILURE DIAGNOSIS

TNV DI Servic

DTCs (Diagnostic Trouble Codes) General Description(4) P0634/0: ECU Temperature Rise Alarm



Estimation of Failure cause/E The ambient temperature aro The E-ECU internal circuitry m

DTC P0634/0 ECU Temperature Rise Alarm


1. Key switch ON.2. ECU internal temperature is 150 [C] or higher.3. Two flashes followed by five flashes.

E-ECU

Setting of response to ECU temperature rise errorUnavailable Available


[Run Under Restrictions]:The engine continues to run under restrictions.

Run restricted? No. Yes: The system restricts the High idle speed or engine power.

Recovery Conditions

Yes: This error is automatically reset when tempeis dete

Yes: This error is automatically reset

Remarks


rror conditionund the ECU may be too high.

ay be faulty.

the normal internal rature (under 100[C]) of ECU cted.

when the normal internal temperature (under 100[C]) of ECU is detected.

FAILURE DIAGNOSIS

1-44



Check the fault indication. Check the ECU temperature.


2) Engine Inspection Turn the key switch off to stop the engine. Inspect around the E-ECU. After a little, turn the key switch on to check if the DTC is detected.

*For description and procedure of engine inspection, see the Service manual (section Engine).


Check the ECU temperature sensor.

*For de



FAILURE DIAGNOSIS

TNV DI Servic

DTCs (Diagnostic Trouble Codes) General DescriptionCooling water temperature sensor(1) P0117/4: Failure with Cooling Water Temperature Sensor (Low Voltage)




The cooling water tempera The cooling water tempera

The cooling water temperatur Output defect of the cooling


DTC P0117/4 Failure with Cooling Water Temperature Sensor (Low Voltage)


1. Key switch ON.2. Sensor voltage 0.2 [V] or lower.3. Four flashes.

ConnectorHarnessCooling water temperature sensorE-ECU

In the case of a system with EGR In the case of a system without EGRError Mode [Run Under Restrictions]:

The engine continues to run under restrictions.

[Run As Is]:

The engine continues to run with the cooling water temperature set to the default of 30[C].

Run restricted? Yes: The sspeed

Recovery Conditions

No.

Remarks The restrictagainst EG



ture sensor's signal wires may be short-circuited with GND.ture sensor's GND wire may be short-circuited with POWER SUPPLY.e sensor may be faulty. water temperature signal by the inner wiring short-circuited with GND.ay be faulty.

ystem restricts the High idle or engine power.

No.

Yes: This error will be automatically reset when a normal sensor voltage (0.2 to 4.8[V]) is kept.

ion similar to one applied R errors is applied.

FAILURE DIAGNOSIS

1-46






Before beginning your work, be sure to turn off the key switch. Check that the connector of the cooling water temperature sensor is correctly

inserted. Check that the wiring of the cooling water temperature sensor is not

disconnected or the insulation of the wiring is not peeled.


Check the resistance value of the cooling water temperature sensor. Check the harness for correct continuity. Check the output voltage of the cooling water temperature sensor.

*For de



FAILURE DIAGNOSIS

TNV DI Servic

DTCs (Diagnostic Trouble Codes) General Description(2) P0118/3: Failure with Cooling Water Temperature Sensor (High Voltage)




The cooling water temperaPOWER SUPPLY.

The cooling water tempera The cooling water temperatur

Output defect of the cooling The E-ECU internal circuitry m

DTC P0118/3 Failure with Cooling Water Temperature Sensor (High Voltage)


1. Key switch ON.2. Sensor voltage 4.8 [V] or higher.3. Four flashes.

ConnectorHarnessCooling water temperature sensorE-ECU

In the case of a system with EGR In the case of a system without EGRError Mode [Run Under Restrictions]:

The engine continues to run under restrictions.

[Run As Is]:

The engine continues to run with the cooling water temperature set to the default of 30 [C].

Run restricted? Yes: The system restricts the High idle speed or engine power.

No.

Recovery Conditions

No.

Remarks The restrictagainst EG



ture sensor's signal wires may be disconnected or short-circuited with

ture GND wire may be disconnected.e sensor may be faulty. water temperature signal by the inner wiring disconnectionay be faulty.

Yes: This error will be automatically reset when a normal sensor voltage (0.2 to 4.8[V]) is kept.

ion similar to one applied R errors is applied.

FAILURE DIAGNOSIS

1-48











*For de



FAILURE DIAGNOSIS

TNV DI Servic

DTCs (Diagnostic Trouble Codes) General Description(3) P0119/2: Intermittent Failure with Cooling Water Temperature Sensor




The cooling water tempera The cooling water temperaPOWER SUPPLY.

GND wire of the cooling wa The cooling water temperatur

Signal wire in the sensor m Sensor GND wire in the sen

DTC P0119/2 Intermittent Failure with Cooling Water Temperature Sensor



ConnectorHarnessHigh-accuracy cooling water temperature sensorE-ECU



No.

Remarks



ture sensor's signal wires may be short-circuited with GND.ture sensor's signal wires may be disconnected or short-circuited with

ter temperature sensor may be disconnected.e sensor may be faulty.ay be disconnected, or short circuited.sor may be disconnected.

FAILURE DIAGNOSIS

1-50











*For de



FAILURE DIAGNOSIS

TNV DI Servic

DTCs (Diagnostic Trouble Codes) General Description(4) P0217/0: Cooling Water Temperature Rise Alarm



Estimation of Failure cause/E The engine may be overheate The engine cooling water leve The engine cooling system m The cooling water temperatur

DTC P0217/0 Cooling Water Temperature Rise Alarm


1. Key switch ON.2. Cooling water temperature 115[C] or higher.3. Three flashes followed by six flashes.

Engine cooling water levelEngine cooling systemCooling Water Temperature Sensor

Setting of response to cooling water temperature rise errorUnavailable Available


[Run Under Restrictions]:The engine continues to run under restrictions.

Run restricted? No. Yes: The system restricts the High idle speed or engine power.

Recovery Conditions

Yes: This ewhen tempedetect

Remarks


rror conditiond.l may be too low.ay be faulty.e sensor may be faulty.

rror is automatically reset the normal cooling water rature (under 110[C]) is ed.

Yes: This error is automatically reset when the normal cooling water temperature (under 110[C]) is detected.

FAILURE DIAGNOSIS

1-52



Check the fault indication. Check the cooling water temperature and the sensor voltage.



Turn the key switch off to stop the engine. Check the engine cooling system. After a little, turn the key switch on to check if the DTC is detected.

*For description and procedure of engine inspection, see the Service manual (Engine).


Check the cooling water temperature sensor system.

*For de



FAILURE DIAGNOSIS

TNV DI Servic

DTCs (Diagnostic Trouble Codes) General DescriptionSENSOR 5V(1) P0642/4: Failure with SENSOR 5V (Low Voltage)



Estimation of Failure cause/Error condition Wiring defect of the harness

The SENSOR 5V wire may The E-ECU internal circuitry m


DTC P0642/4 Failure with SENSOR 5V (Low Voltage)

1 - Precondition; 2 - Detecting condition(s); 3 - Flashing pattern of failure indicator Check points1. Key switch ON.2. SENSOR 5V monitoring voltage 4.5 [V] or lower.3. Two flashes followed by four flashes.

HarnessE-ECU

Error Mode [Operation Continuation]: After detecting the error, the system lets the engine continue to run without any restrictions.


No.

Remarks


Chec Chec*For de


Befo Chec


Chec Chec*For de


be short-circuited with GND.ay be faulty.

k the fault indication.k the voltage of the Sensor 5V .tails of the method and the procedure of diagnosis, see P.1-160

re beginning your work, be sure to turn off the key switch.k that the insulation of the Sensor 5V is not peeled.

k the harness for correct continuity.k the output voltage of the E-ECU (voltage of the sensor 5V line).tails of the method and the procedure of diagnosis, see P.1-160

FAILURE DIAGNOSIS

1-54

DTCs (Diagnostic Trouble Codes) General Description(2) P0643/3: Failure with SENSOR 5V (High Voltage)




The SENSOR GND wire may be disconnected. The SENSOR 5V wire may



DTC P0643/3 Failure with SENSOR 5V (High Voltage)

1 - Precondition; 2 - Detecting condition(s); 3 - Flashing pattern of failure indicator Check points1. Key switch ON.2. SENSOR 5V monitoring voltage 5.5 [V] or higher.3. Two flashes followed by four flashes.

HarnessE-ECU



No.

Remarks


Chec Chec*For de


Befo Chec

insul


Chec Chec*For de


be short-circuited with POWER SUPPLY.ay be faulty.


re beginning your work, be sure to turn off the key switch.k that the Sensor 5V line and sensor GND line are not disconnected or the ation of the wiring is not peeled.


FAILURE DIAGNOSIS

TNV DI Servic

DTCs (Diagnostic Trouble Codes) General Description(3) P1644/2: Intermittent Failure with SENSOR 5V




The SENSOR 5V wire may be short-circuited with power supply or GND. Sensor GND wire may be d



DTC P1644/2 Intermittent Failure with SENSOR 5V

1 - Precondition; 2 - Detecting condition(s); 3 - Flashing pattern of failure indicator Check points1. Engine running.2. Unconfirmed error detected 10 times.3: Does not flash.

HarnessE-ECU



No.

Remarks


Chec Chec*For de


Befo Chec

insul


Chec Chec*For de


isconnected.ay be faulty.


re beginning your work, be sure to turn off the key switch.k that the Sensor 5V line and sensor GND line are not disconnected or the ation of the wiring is not peeled.


FAILURE DIAGNOSIS

1-56

DTCs (Diagnostic Trouble Codes) General DescriptionPower supply Voltage(1) P0562/1: Power Supply Voltage Error (Low Voltage)



Estimation of Failure cause/Error condition The battery may be deteriorated. The battery connection may b The alternator may be faulty. The harness may be disconne The E-ECU internal circuitry m

DTC P0562/1 Power Supply Voltage Error (Low Voltage)

1 - Precondition; 2 - Detecting condition(s); 3 - Flashing pattern of failure indicator Check points1. Engine running.2. E-ECU supply voltage below 10[V]3. Two flashes followed by three flashes.

BatteryalternatorHarness



Yes: This error will be automatically reset when a normal supply voltage (10 to 16[V]) is input.

Remarks


e miswired.

cted or short-circuited.ay be faulty.

FAILURE DIAGNOSIS

TNV DI Servic



Check the fault indication. Check the battery voltage.

2) Engine Inspection Turn the key switch off to stop the engine. Check the battery voltage using a circuit tester. Inspect the charging system of the engine . After a little, turn the key switch on to check if the DTC is detected.



Check that the battery wiring is not disconnected or the insulation of the wiring is not peeled.


FAILURE DIAGNOSIS

1-58

DTCs (Diagnostic Trouble Codes) General Description(2) P0563/0: Power Supply Voltage Error (High Voltage)



Estimation of Failure cause/Error condition An incompatible battery (such as a 24V battery) may be used. The battery connection may be miswired. The alternator may be faulty. The harness may be disconne The E-ECU internal circuitry m

DTC P0563/0 Power Supply Voltage Error (High Voltage)

1 - Precondition; 2 - Detecting condition(s); 3 - Flashing pattern of failure indicator Check points1. Engine running.2. E-ECU supply voltage over 16[V]3. Two flashes followed by three flashes.

BatteryalternatorHarness



Yes: This error will be automatically reset when a normal supply voltage (10 to 16[V]) is input.

Remarks


cted or short-circuited.ay be faulty.

FAILURE DIAGNOSIS

TNV DI Servic



Check the fault indication. Check the battery voltage.

2) Engine Inspection Turn the key switch off to stop the engine. Check the battery voltage using a circuit tester. Inspect the charging system of the engine . After a little, turn the key switch on to check if the DTC is detected.



Check that the battery wiring is not disconnected or the insulation of the wiring is not peeled.


FAILURE DIAGNOSIS

1-60


Pulse Sensor Related FailuresSpeed Sensor(1) P0340/4: Failure with Speed Sensor



Estimation of Failure cause/E The connector may not be pro Engine speed defect

Battery voltage descent at Starter system failure Fuel injection not available Engine locked (seizure, fre Battery voltage descent (ov Load increase driven by the

Wiring defect of the harness The speed sensor's signal The starter signal wire may

The speed sensor may be fau Output defect of the speed


DTC P0340/4 Speed Sensor Error

1 - Precondition; 2 - Detecting condition(s); 3 - Flashing pattern of failure indicator Check points1. Key switch START, engine running.2. Speed sensor signal 0[min-1]3. Six flashes.

ConnectorHarnessSpeed SensorE-ECU

Spare speed sensor settingUnavailable Available

Error Mode [Stop Immediately]:The engine stops running.

[Run Under Restrictions]:The engine continues to run under restrictions with the spare speed sensor used instead.

Run restricted? Yes: The rack actuator relay is turned OFF, and the rack position is forcibly set to

Yes: The system restricts the High idle speed or engine power.

Recovery Conditions

Yes: Key s

Remarks



cold start etc.

(fuel freezing)ezing)er discharge, deterioration) operating machine

wires (+) and (-) may be disconnected or short-circuited with GND. be short-circuited with POWER SUPPLY.lty.signal by a disconnection or a short circuit of the inner wiringay be faulty.

the engine stop position.witch START Yes: Key switch START

FAILURE DIAGNOSIS

TNV DI Servic



Check the fault indication. Check the engine speed.



Before beginning your work, be sure to turn off the key switch. Check that the connector of the speed sensor is correctly inserted. Check that the wiring of the speed sensor is not disconnected or the insulation



Check the resistance value of the speed sensor. Check the harness for correct continuity.



FAILURE DIAGNOSIS

1-62

DTCs (Diagnostic Trouble Codes) General DescriptionSpare speed sensor (option)(1) P1340/4: Failure with Spare Speed Sensor



Estimation of Failure cause/E The connector may not be pro Output pulse voltage defect b Output pulse defect by the ba Wiring defect of the harness

The spare speed sensor's s The alternator's terminals B

Output pulse defect by the alt The E-ECU internal circuitry m

DTC P1340/4 Failure with Spare Speed Sensor

1 - Precondition; 2 - Detecting condition(s); 3 - Flashing pattern of failure indicator Check points1. Engine running.2. Spare speed sensor signal below 0[min-1].3. One flash followed by another flash.

ConnectorHarnessalternatorE-ECU

Main speed sensor error detectionUnavailable Available


[Stop Immediately]:The engine stops running.

Run restricted? No. Yes: The rack actuator relay is turned OFF, and the rack position is forcibly

Recovery Conditions

No.

Remarks



y low engine speedttery over-charge

ignal wires may be disconnected or short-circuited with GND. and IG may be disconnected or short-circuited with GND.

ernator failureay be faulty.

set to the engine stop position.Yes:Key switch START

FAILURE DIAGNOSIS

TNV DI Servic



Check the fault indication. Check the rotational speed of the spare speed sensor.



Before beginning your work, be sure to turn off the key switch. Check that the connector of the alternator is correctly inserted. Check that the wiring of the alternator is not disconnected or the insulation of



Check the battery voltage. Check the harness for correct continuity.



FAILURE DIAGNOSIS

1-64

DTCs (Diagnostic Trouble Codes) General DescriptionEngine rotational speed(1) P0219/0: Over speed error




The rack actuator wiring ma False generation of speed sen

False wiring of the speed s Engine over speed loaded by Control error of the fuel inject

The rack actuator wiring ma The E-ECU internal circuitry m

DTC P0219/0 Overspeed Error

1 - Precondition; 2 - Detecting condition(s); 3 - Flashing pattern of failure indicator Check points1. Engine running.2. Sensor signal at or above the upper limit (High idle speed +600[min-1]).3. Two flashes followed by five flashes.

HarnessSpeed SensorRack actuatorE-ECU

Error Mode [Stop Immediately]: The engine stops running.Run restricted? Yes: The rack actuator relay is turned OFF, and the rack position is forcibly set to the

engine stop position.Recovery Conditions

No.

Remarks


y be short-circuited with GND.sor signal pulse

ensor the operating machines driveion pumpy be short-circuited with GND.ay be faulty.

FAILURE DIAGNOSIS

TNV DI Servic



Check the fault indication.

2) Engine Inspection Turn the key switch off to stop the engine. Inspect the engine and the operating machine. After a little, turn the key switch on to check if the DTC is detected.



Check the Rack Actuator.



FAILURE DIAGNOSIS

1-66


Contact Output Related FailuresRack actuator Relay(1) P1222/4: Failure A with Rack Actuator Relay




The rack actuator relay wiri The rack actuator relay may b

Inner wiring disconnection The E-ECU internal circuitry m

DTC P1222/4 Failure A with Rack Actuator Relay

1 - Precondition; 2 - Detecting condition(s); 3 - Flashing pattern of failure indicator Check points1. Key switch ON.2. Make an assessment logically as to followings.E-ECU detects the rack actuator

relay turning ON during the command to turn OFF the rack actuator relay.3. One flash followed by seven flashes.

ConnectorHarnessRack actuator RelayE-ECU



No.

Remarks



ng may be disconnected or short-circuited with GND.e faulty.

ay be faulty.

FAILURE DIAGNOSIS

TNV DI Servic



Check the fault indication. Check the output signal of the rack actuator relay. Check the movement of the rack actuator relay by the active control function.



Before beginning your work, be sure to turn off the key switch. Check that the connector of the rack actuator relay is correctly inserted. Check that the wiring of the rack actuator relay is not disconnected or the



Check the resistance value of the rack actuator relay. Check the harness for correct continuity.

*For de



FAILURE DIAGNOSIS

1-68

DTCs (Diagnostic Trouble Codes) General Description(2) P1223/3: Failure B with Rack Actuator Relay




The rack actuator relay wiri The rack actuator relay may b

Inner wiring short-circuited*NOTE) If the rack actuator re

before the E-ECU's pthe error, and to stor


DTC P1223/3 Failure B with Rack Actuator Relay

1 - Precondition; 2 - Detecting condition(s); 3 - Flashing pattern of failure indicator Check points1. Key switch ON.2. Make an assessment logically as to followings.E-ECU detects the rack actuator

relay turning OFF during the command to turn ON the rack actuator relay.3. One flash followed by seven flashes.

ConnectorHarnessRack actuator RelayE-ECU



No.

Remarks


ng may be short-circuited with POWER SUPPLY (*NOTE).e faulty. with POWER SUPPLY (*NOTE).lay wire is short-circuited with POWER SUPPLY, inner circuit of E-ECU may failower supply line fuse 10A is blown.In this case, the ECU fails to detect/indicatee the error history.

ay be faulty.

FAILURE DIAGNOSIS

TNV DI Servic

DTCs (Diagnostic Trouble Codes) General Descripti

Documents

Yanmar TNV Troubleshooting Electronic Control 0DTNV-G00600 Troubleshooting Manual