Infiniti F50. Manual - part 451

DTC P1124, P1126 THROTTLE CONTROL MOTOR RELAY

EC-445

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 With GST

Follow the procedure “With CONSULT-II” above.

PROCEDURE FOR DTC P1126

 With CONSULT-II

1.

Turn ignition switch “ON” and wait at least 2 seconds.

2.

Select “DATA MONITOR””mode with CONSULT-II.

3.

Start engine and let it idle for 5 seconds.

4.

If DTC is detected, go to 

EC-447, "Diagnostic Procedure"

 .

 With GST

Follow the procedure “With CONSULT-II” above.

SEF058Y

EC-446

DTC P1124, P1126 THROTTLE CONTROL MOTOR RELAY

Wiring Diagram

EBS00MHY

TBWM0122E

DTC P1124, P1126 THROTTLE CONTROL MOTOR RELAY

EC-447

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Specification data are reference values and are measured between each terminal and ground.

CAUTION:

Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.

Diagnostic Procedure

EBS00MHZ

1. 

CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY

1.

Turn ignition switch “OFF”

2.

Disconnect throttle control motor relay harness connector.

3.

Disconnect ECM harness connector.

4.

Check voltage between throttle control motor relay terminals 2, 3
and ground with CONSULT-II or tester.

OK or NG

OK

>> GO TO 3.

NG

>> GO TO 2.

2. 

DETECT MALFUNCTIONING PART

Check the following.

●

15A fuse

●

Harness for open or short between throttle control motor relay and battery

>> Repair or replace harness or connectors.

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

26

OR

Throttle control motor relay

[Ignition switch “OFF”]

BATTERY VOLTAGE
(11 - 14V)

[Ignition switch “ON”]

0 - 1.0V

157

L

Throttle control motor relay 
power supply

[Ignition switch “ON”]

BATTERY VOLTAGE
(11 - 14V)

PBIB0031E

Voltage: Battery voltage

PBIB0097E

EC-448

DTC P1124, P1126 THROTTLE CONTROL MOTOR RELAY

3. 

CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Check continuity between ECM terminal 157 and throttle control motor relay terminal 5.
Refer to Wiring Diagram.

2.

Also check harness for short to ground and short to power.

OK or NG

OK

>> GO TO 5.

NG

>> GO TO 4.

4. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors F32, E32

●

Harness for open or short between ECM and throttle control motor relay

>> Repair open circuit or short to ground or short to power in harness or connectors.

5. 

CHECK THROTTLE CONTROL MOTOR RELAY OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Check continuity between ECM terminal 26 and throttle control motor relay terminal 1.
Refer to Wiring Diagram.

2.

Also check harness for short to ground and short to power.

OK or NG

OK

>> GO TO 7.

NG

>> GO TO 6.

6. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors F32, E32

●

Harness for open or short between ECM and throttle control motor relay

>> Repair open circuit or short to ground or short to power in harness or connectors.

7. 

CHECK THROTTLE CONTROL MOTOR RELAY

Refer to 

EC-448, "Component Inspection"

 .

OK or NG

OK

>> GO TO 8.

NG

>> Replace throttle control motor relay.

8. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-132, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END

Component Inspection

EBS00MI0

THROTTLE CONTROL MOTOR RELAY

1.

Apply 12V direct current between relay terminals 1 and 2.

Continuity should exist.

Continuity should exist.