m_di_0082

A23868

IJ+ Signal

DC/DC ConverterBattery

Time

SpillControlValve

SPV+

ControllerEngineECU

EDU

SPV Signal

SPV−SPVD

SPVF

IJ+

IJF

Time

[V]

5

0

150

0

[V]

+B

DI−82−DIAGNOSTICS ENGINE

1HD−FTV ENGINE SUP (RM1179E)

DTC P1215/97 EDU Circuit

CIRCUIT DESCRIPTIONThe EDU drives the spill control valve at high speeds. The EDU’s high−speed driving under high fuel pres-sure conditions is achieved through the use of a DC/DC converter that provides a high−voltage, quick−charging system.The engine ECU constantly monitors the EDU and stops the engine in case an abnormal condition is de-tected.The battery voltage is increased by the DC/DC converter. A voltage of approximately 150 V is applied to thespill control valve in accordance with the IJ+ signal received from the engine ECU. At this time, the injectionverification signal (IJF) is sent to the engine ECU.

DTC No. DTC Detection condition Trouble Area

Alth h SPVD i t t t EDU ith i d t 500SOpen or short in EDU circuit

P1215/97Although SPVD is output to EDU with engine speed at 500 rpmor more SPVF is not input continuously 5 times or more

SOpen or short in EDU circuitSEDUP1215/97

or more, SPVF is not input continuously 5 times or moreEDUSSpill control valve

DI3SA−02

A23869

E15EDU

L−Y4

3

10 7

6

SPVD

Engine ECU

SPVF

+B

5 V

9

L−Y L−YIG1 IN6

L−R L−R L−RIG1 IN6

3

1

2W

2B

BR

13

C

W−B2

1G

EN1

G

R

4

5

From SPIL/VLV Relay

S3Spill Control Valve

IJT

IJFSPV−

SPV+

5

4

2EU1

G

R R

EU1EN1

EN1 EU14W−BW−BW−B

W−B

12

CW−B

IF

*1: Shielded*2: LHD (w/ VSC)*3: LHD (w/o VSC)*4: RHD

J1*2, J2*3, J3*4J/C

*1 *1 *1

+B

*1

GND

E17

E17

Cowl SideJ/B LH

−DIAGNOSTICS ENGINEDI−83


WIRING DIAGRAM

BE6653A05975 A05977

2 (+B)

(+) (−)

ON

A23899

5 (SPV−)

4 (SPV+)

(+) (−)


1HD−FTV ENGINE SUP (RM11 79E)

INSPECTION PROCEDURE

1 Check voltage between terminal 2 of wire harness side connector and bodyground.

PREPARATION:(a) Disconnect the EDU connector.(b) Turn the ignition switch ON.CHECK:Measure the voltage between terminal 2 of wire harness sideconnector and body ground.OK:

Voltage: 10 to 14 V

NG Check Spill valve relay circuit(See page DI−1 57).

OK

2 Check resistance EDU ground bolt and body ground.

NG Tighten EDU ground bolt.

OK

3 Check resistance between terminals 4 and 5 of wire harness side connector.

CHECK:Measure resistance between terminals 4 and 5 of wire harnessside connector.OK:

Resistance: Approx. 1.7 �

OK Go to step 5.

NG

A23883

SPVD

A16926

1 V/DIV.SPVD Signal Waveforms

10 msec./DIV. (Idling)

GND

SPVD

−DIAGNOSTICS ENGINEDI−85


4 Check spill control valve (See Pub No. RM617E, page FU−113).

NG Check and replace injection pump(See Pub No. RM617E, page FU−113).

OK

Check for open and short in harness and connector between spill control valve and EDU(See page IN−1 9) .

5 Check for open and short in harness and connector between engine ECU andEDU (See page IN−1 9) .

NG Repair or replace harness or connector.

OK

6 Check voltage between terminal SPVD of engine ECU connector and bodyground.

PREPARATION:(a) Remove the glove compartment door.(b) Turn the ignition switch ON.CHECK:Measure the voltage between terminal SPVD of the engineECU connector and body ground.OK:

Voltage: Approx. 0 V

Reference: INSPECTION USING OSCILLOSCOPEDuring idling, check the waveform between terminals SPVDand E1 of the engine ECU.HINT:The correct waveform is as shown.

NG Check and replace engine ECU(See page IN−1 9) .

A23883

SPVF

A05970

5 V/DIV.SPVF Signal Waveforms

10 msec./DIV. (Idling)

GNDSPVF



OK

7 Check voltage between terminal SPVF of engine ECU and body ground.

PREPARATION:(a) Remove the glove compartment door.(b) Turn the ignition switch ON.CHECK:Measure the voltage between terminals SPVF of the engineECU and body ground.OK:

Voltage: 9 to 14 V

Reference: INSPECTION USING OSCILLOSCOPEDuring idling, check the waveform between terminals SPVFand E1 of the engine ECU.HINT:The correct waveform is as shown.

NG Check and replace engine ECU(See page IN−1 9) .

OK

Check and replace EDU (See Pub No.RM617E, page ED−15).

Documents

m_di_0082