Infiniti G35 (V35). Manual - part 423

DTC P2100, P2103 THROTTLE CONTROL MOTOR RELAY

EC-573

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DTC P2100, P2103 THROTTLE CONTROL MOTOR RELAY

PFP:16119

Component Description

NBS000W7

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

NBS000W8

Specification data are reference values.

On Board Diagnosis Logic

NBS000W9

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

NBS000WA

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 P2100

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 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-576, "Diagnostic Procedure"

 .

MONITOR ITEM

CONDITION

SPECIFICATION

THRTL RELAY

●

Ignition switch: ON

ON

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P2100
2100

Throttle control motor 
relay circuit open

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

●

Harness or connectors
(The throttle control motor relay circuit is 
open)

●

Throttle control motor relay

P2103
2103

Throttle control motor 
relay circuit short

ECM detects the throttle control motor relay is 
stuck ON.

●

Harness or connectors
(The throttle control motor relay circuit is 
shorted)

●

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-574

DTC P2100, P2103 THROTTLE CONTROL MOTOR RELAY

 With GST

Follow the procedure “With CONSULT-II” above.

PROCEDURE FOR DTC P2103

 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-576, "Diagnostic Procedure"

 .

 With GST

Follow the procedure “With CONSULT-II” above.

SEF058Y

DTC P2100, P2103 THROTTLE CONTROL MOTOR RELAY

EC-575

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Wiring Diagram

NBS000WB

TBWM1281E

EC-576

DTC P2100, P2103 THROTTLE CONTROL MOTOR RELAY

Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.

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.

: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)

Diagnostic Procedure

NBS000WC

1. 

CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT-I

1.

Turn ignition switch OFF.

2.

Check voltage between ECM terminal 104 and ground with
CONSULT-II or tester.

OK or NG

OK

>> GO TO 5.

NG

>> GO TO 2.

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

3

W/R

Throttle control motor relay 
power supply

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14V)

4

BR

Throttle control motor 
(Close)

[Ignition switch: ON]

●

Engine stopped

●

Shift lever: D (A/T) or 1st (M/T)

●

Accelerator pedal: Fully released

0 - 14V

5

G

Throttle control motor 
(Open)

[Ignition switch: ON]

●

Engine stopped

●

Shift lever: D (A/T) or 1st (M/T)

●

Accelerator pedal: Fully depressed

0 - 14V

104

G/W

Throttle control motor relay

[Ignition switch: OFF]

BATTERY VOLTAGE
(11 - 14V)

[Ignition switch: ON]

0 - 1.0V

PBIB1104E

PBIB1105E

Voltage: Battery voltage

PBIB1171E