Infiniti FX35 / FX45. Manual - part 433

DTC P2100, P2103 THROTTLE CONTROL MOTOR RELAY

EC-493

< SERVICE INFORMATION >

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3.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors E211, M41
• Harness for open or short between ECM and IPDM E/R

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

4.

CHECK FUSE

1.

Disconnect 15A fuse.

2.

Check 15A fuse for blown.

OK or NG

OK

>> GO TO 8.

NG

>> Replace 15A fuse.

5.

CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-I

Check voltage between ECM terminal 3 and ground under the fol-
lowing conditions with CONSULT-III or tester.

OK or NG

OK

>> GO TO 8.

NG

>> GO TO 6.

6.

CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-II

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Disconnect IPDM E/R harness connector E8.

4.

Check continuity between ECM terminal 3 and IPDM E/R terminal 42.
Refer to Wiring Diagram.

5.

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

OK or NG

OK

>> GO TO 8.

NG

>> GO TO 7.

7.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors E64, F65
• Harness for open or short between ECM and IPDM E/R

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

8.

CHECK INTERMITTENT INCIDENT

Refer to 

EC-139

.

OK or NG

OK

>> Replace IPDM E/R. Refer to 

PG-17

.

NG

>> Repair or replace harness or connectors.

Ignition switch

Voltage

OFF

Approximately 0V

ON

Battery voltage

(11 - 14V)

MBIB0028E

Continuity should exist.

EC-494

< SERVICE INFORMATION >

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DTC P2101 ELECTRIC THROTTLE CONTROL FUNCTION

DTC P2101 ELECTRIC THROTTLE CONTROL FUNCTION

Description

INFOID:0000000001326369

NOTE:
If DTC P2101 is displayed with DTC P2100 or 2119, first perform the trouble diagnosis for DTC P2100
or P2119. Refer to 

EC-490

 or 

EC-504

.

Electric throttle control actuator consists of throttle control motor, throttle position sensor, etc.
The throttle control motor is operated by the ECM and it opens and closes the throttle valve.
The current opening angle of the throttle valve is detected by the throttle position sensor and it provides feed-
back to the ECM to control the throttle control motor to make the throttle valve opening angle properly in
response to driving condition.

On Board Diagnosis Logic

INFOID:0000000001326370

This self-diagnosis has 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

INFOID:0000000001326371

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.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 11V when the
engine is running.
1.

Turn ignition switch ON and wait at least 2 seconds.

2.

Start engine and let it idle for 5 seconds.

3.

Check DTC.

4.

If DTC is detected, go to 

EC-496, "Diagnosis Procedure"

.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P2101
2101

Electric throttle control 
performance

Electric throttle control function does not oper-
ate properly.

• Harness or connectors

(Throttle control motor circuit is open or 
shorted)

• Electric throttle control actuator

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.

DTC P2101 ELECTRIC THROTTLE CONTROL FUNCTION

EC-495

< SERVICE INFORMATION >

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Wiring Diagram

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

CAUTION:

TBWM1396E

EC-496

< SERVICE INFORMATION >

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DTC P2101 ELECTRIC THROTTLE CONTROL FUNCTION

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.)

Diagnosis Procedure

INFOID:0000000001326373

1.

CHECK GROUND CONNECTIONS

1.

Turn ignition switch OFF

2.

Loosen and retighten ground screw on the body. Refer to 

EC-144, "Ground Inspection"

.

OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace ground connections.

2.

CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-I

TER-

MI-

NAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

3

R

Throttle control motor relay 
power supply

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14V)

4

L/W

Throttle control motor 
(Close)

[Ignition switch: ON]
• Engine stopped
• Selector lever: D
• Accelerator pedal: Fully released

0 - 14V

5

L/B

Throttle control motor 
(Open)

[Ignition switch: ON]
• Engine stopped
• Selector lever: D
• Accelerator pedal: Fully depressed

0 - 14V

104

L/OR

Throttle control motor relay

[Ignition switch: OFF]

BATTERY VOLTAGE
(11 - 14V)

[Ignition switch: ON]

0 - 1.0V

PBIB1104E

PBIB1105E

PBIB2625E