Infiniti M45 (Y34). Manual - part 440

 

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Infiniti M45 (Y34). Manual - part 440

 

 

DTC P1124, P1126 THROTTLE CONTROL MOTOR RELAY

EC-449

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DTC P1124, P1126 THROTTLE CONTROL MOTOR RELAY

PFP:16119

Component Description

ABS002NN

Power supply for the throttle control motor is provided to the ECM via throttle control motor relay. The throttle
control motor relay is ON/OFF controlled by the ECM. When the ignition switch is turned ON, the ECM sends
an ON signal to throttle control motor relay and battery voltage is provided to the ECM. When the ignition
switch is turned OFF, the ECM sends an OFF signal to throttle control motor relay and battery voltage is not
provided to the ECM.

CONSULT-II Reference Value in Data Monitor Mode

ABS002NO

Specification data are reference values.

On Board Diagnosis Logic

ABS002NP

These self-diagnoses have the one trip detection logic.

FAIL-SAFE MODE

When the malfunction is detected, ECM enters fail-safe mode and the MIL lights up.

DTC Confirmation Procedure

ABS002NQ

NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.

PROCEDURE FOR DTC P1124

TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 8V.

 With CONSULT-II

1.

Turn ignition switch ON and wait at least 1 second.

2.

Select “DATA MONITOR” mode with CONSULT-II.

3.

If DTC is detected, go to 

EC-452, "Diagnostic Procedure"

 .

MONITOR ITEM

CONDITION

SPECIFICATION

THRTL RELAY

Ignition switch: ON

ON

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P1124
1124

Throttle control motor 
relay circuit short

ECM detects the throttle control motor relay is 
stuck ON.

Harness or connectors
(Throttle control motor relay circuit is 
shorted)

Throttle control motor relay

P1126
1126

Throttle control motor 
relay circuit open

ECM detects a voltage of power source for 
throttle control motor is excessively low.

Harness or connectors
(Throttle control motor relay circuit is 
open)

Throttle control motor relay

Engine operating condition in fail-safe mode

ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return 
spring.

SEF058Y

EC-450

DTC P1124, P1126 THROTTLE CONTROL MOTOR RELAY

 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-452, "Diagnostic Procedure"

 .

 With GST

Follow the procedure With CONSULT-II above.

SEF058Y

DTC P1124, P1126 THROTTLE CONTROL MOTOR RELAY

EC-451

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Wiring Diagram

ABS002NR

TBWA0299E

EC-452

DTC P1124, P1126 THROTTLE CONTROL MOTOR RELAY

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

ABS002NS

1. 

CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY

1.

Turn ignition switch OFF

2.

Disconnect throttle control motor relay harness connector.

3.

Check voltage between throttle control motor relay terminals 2, 5
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)

PBIB1112E

Voltage: Battery voltage

PBIB0575E

 

 

 

 

 

 

 

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