Infiniti G35 (V35). Manual - part 425

DTC P2101 ELECTRIC THROTTLE CONTROL FUNCTION

EC-581

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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

NBS000W4

1. 

CHECK GROUND CONNECTIONS

1.

Turn ignition switch OFF.

2.

Loosen and retighten two ground screws on the body. Refer to 

EC-159, "Ground Inspection"

 .

OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace ground connections.

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

PBIB2192E

EC-582

DTC P2101 ELECTRIC THROTTLE CONTROL FUNCTION

2. 

CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-I

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

OK or NG

OK

>> GO TO 10.

NG

>> GO TO 3.

3. 

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 7.

NG

>> GO TO 4.

4. 

CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT-II

1.

Disconnect ECM harness connector.

2.

Disconnect IPDM E/R harness connector E9.

3.

Check continuity between ECM terminal 104 and IPDM E/R terminal 47.
Refer to Wiring Diagram.

4.

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

OK or NG

OK

>> GO TO 6.

NG

>> GO TO 5.

5. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors E12, F3

●

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.

6. 

CHECK FUSE

1.

Disconnect 15A fuse.

2.

Check 15A fuse for blown.

OK or NG

OK

>> GO TO 7.

NG

>> Replace 15A fuse.

Ignition switch

Voltage

OFF

Approximately 0V

ON

Battery voltage

(11 - 14V)

MBIB0028E

Voltage: Battery voltage

PBIB1171E

Continuity should exist.

DTC P2101 ELECTRIC THROTTLE CONTROL FUNCTION

EC-583

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7. 

CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-II

1.

Disconnect ECM harness connector.

2.

Disconnect IPDM E/R harness connector E8.

3.

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

4.

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

OK or NG

OK

>> GO TO 9.

NG

>> GO TO 8.

8. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors E11, F2

●

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.

9. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-151, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

OK or NG

OK

>> Replace IPDM E/R. Refer to 

PG-16, "IPDM E/R (INTELLIGENT POWER DISTRIBUTION MOD-

ULE ENGINE ROOM)"

 .

NG

>> Repair or replace harness or connectors.

10. 

CHECK THROTTLE CONTROL MOTOR OUTPUT SIGNAL CIRCUIT FOR OPEN OR SHORT

1.

Turn ignition switch OFF.

2.

Disconnect electric throttle control actuator harness connector.

3.

Disconnect ECM harness connector.

4.

Check harness continuity between the following terminals.
Refer to Wiring Diagram.

5.

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

OK or NG

OK

>> GO TO 11.

NG

>> Repair or replace.

Continuity should exist.

Electric throttle control 

actuator terminal

ECM terminal

Continuity

3

5

Should not exist

4

Should exist

6

5

Should exist

4

Should not exist

PBIB0995E

EC-584

DTC P2101 ELECTRIC THROTTLE CONTROL FUNCTION

11. 

CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY 

1.

Remove the intake air duct.

2.

Check if foreign matter is caught between the throttle valve and
the housing.

OK or NG

OK

>> GO TO 12.

NG

>> Remove the foreign matter and clean the electric throttle

control actuator inside.

12. 

CHECK THROTTLE CONTROL MOTOR

Refer to 

EC-584, "Component Inspection"

 .

OK or NG

OK

>> GO TO 13.

NG

>> GO TO 14.

13. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-151, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

OK or NG

OK

>> GO TO 14.

NG

>> Repair or replace harness or connectors.

14. 

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1.

Replace the electric throttle control actuator.

2.

Perform 

EC-79, "Throttle Valve Closed Position Learning"

 .

3.

Perform 

EC-79, "Idle Air Volume Learning"

 .

>> INSPECTION END

Component Inspection

NBS000W5

THROTTLE CONTROL MOTOR

1.

Disconnect electric throttle control actuator harness connector.

2.

Check resistance between terminals 3 and 6.

3.

If NG, replace electric throttle control actuator and go to next
step.

4.

Perform 

EC-79, "Throttle Valve Closed Position Learning"

 .

5.

Perform 

EC-79, "Idle Air Volume Learning"

 .

Removal and Installation

NBS000W6

ELECTRIC THROTTLE CONTROL ACTUATOR

Refer to 

EM-18, "INTAKE MANIFOLD COLLECTOR"

 .

PBIB1015E

Resistance: Approximately 1 - 15 

Ω

 [at 25 

°

C (77

°

F)]

PBIB0095E