Infiniti EX35. Manual - part 655

EC-362

< COMPONENT DIAGNOSIS >

[VQ35HR]

P1233, P2101 ELECTRIC THROTTLE CONTROL FUNCTION

7.

CHECK FUSE

1.

Disconnect 15A fuse (No. 51) from IPDM E/R.

2.

Check 15A fuse for blown.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Replace 15A fuse.

8.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-38, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace IPDM E/R.

NO

>> Repair or replace harness or connectors.

9.

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 the continuity between electric throttle control actuator harness connector and ECM harness con-
nector.

5.

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

Is the inspection result normal?

YES

>> GO TO 10.

NO

>> Repair or replace malfunctioning part.

10.

CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY 

1.

Remove the intake air duct.

2.

Check if foreign matter is caught between the throttle valve (1)
and the housing.

Is the inspection result normal?

YES

>> GO TO 11.

NO

>> Remove the foreign matter and clean the electric throttle

control actuator inside.

11.

CHECK THROTTLE CONTROL MOTOR

Refer to 

EC-363, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 12.

NO

>> GO TO 13.

DTC

Electric throttle control actuator

ECM

Continuity

Bank

Connector

Terminal

Connector

Terminal

P1233

2

F27

5

F102

49

Existed

50

Not existed

6

49

Not existed

50

Existed

P2101

1

F6

1

F101

2

Existed

4

Not existed

2

2

Not existed

4

Existed

JMBIA0025ZZ

P1233, P2101 ELECTRIC THROTTLE CONTROL FUNCTION

EC-363

< COMPONENT DIAGNOSIS >

[VQ35HR]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

12.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-38, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> GO TO 13.

NO

>> Repair or replace harness or connectors.

13.

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1.

Replace malfunction electric throttle control actuator.

2.

Go to 

EC-363, "Special Repair Requirement"

.

>> INSPECTION END

Component Inspection

INFOID:0000000003133524

1.

CHECK THROTTLE CONTROL MOTOR

1.

Turn ignition switch OFF.

2.

Disconnect electric throttle control actuator harness connector.

3.

Check resistance between electric throttle control actuator terminals as follows.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 2.

2.

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1.

Replace malfunctioning electric throttle control actuator.

2.

Go to 

EC-363, "Special Repair Requirement"

.

>> INSPECTION END

Special Repair Requirement

INFOID:0000000003133525

1.

PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Refer to 

EC-17, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"

>> GO TO 2.

2.

PERFORM IDLE AIR VOLUME LEARNING

Refer to 

EC-18, "IDLE AIR VOLUME LEARNING : Special Repair Requirement"

>> END

Electric throttle control actuator

Resistance

Bank

Terminals

1

1 and 2

Approx. 1 - 15 

Ω

 [at 25

°

C (77

°

F)]

2

5 and 6

EC-364

< COMPONENT DIAGNOSIS >

[VQ35HR]

P1236, P2118 THROTTLE CONTROL MOTOR

P1236, P2118 THROTTLE CONTROL MOTOR

Description

INFOID:0000000003133526

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.

DTC Logic

INFOID:0000000003133527

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

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

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON and wait at least 2 seconds.

2.

Start engine and let it idle for 5 seconds.

3.

Check DTC.

Is DTC detected?

YES

>> Go to 

EC-364, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000003133528

1.

CHECK GROUND CONNECTION

1.

Turn ignition switch OFF.

2.

Check ground connection M95. Refer to Ground Inspection in 

GI-41, "Circuit Inspection"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace ground connection.

2.

CHECK THROTTLE CONTROL MOTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Disconnect electric throttle control actuator harness connector.

2.

Disconnect ECM harness connector.

3.

Check the continuity between electric throttle control actuator harness connector and ECM harness con-
nector.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P1236

Throttle control motor 
(bank 2) circuit short

ECM detects short in both circuits between 
ECM and throttle control motor.

• Harness or connectors

(Throttle control motor circuit is shorted.)

• Electric throttle control actuator

(Throttle control motor)

P2118

Throttle control motor 
(bank 1) circuit short

DTC

Electric throttle control actuator

ECM

Continuity

Bank

Connector

Terminal

Connector

Terminal

P1236

2

F27

5

F102

49

Existed

50

Not existed

6

49

Not existed

50

Existed

P1236, P2118 THROTTLE CONTROL MOTOR

EC-365

< COMPONENT DIAGNOSIS >

[VQ35HR]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

4.

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

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace malfunctioning part.

3.

CHECK THROTTLE CONTROL MOTOR

Refer to 

EC-365, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 5.

4.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-38, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace harness or connectors.

5.

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1.

Replace malfunctioning electric throttle control actuator.

2.

Go to 

EC-365, "Special Repair Requirement"

.

>> INSPECTION END

Component Inspection

INFOID:0000000003133529

1.

CHECK THROTTLE CONTROL MOTOR

1.

Turn ignition switch OFF.

2.

Disconnect electric throttle control actuator harness connector.

3.

Check resistance between electric throttle control actuator terminals as follows.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 2.

2.

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1.

Replace malfunctioning electric throttle control actuator.

2.

Go to 

EC-365, "Special Repair Requirement"

.

>> INSPECTION END

Special Repair Requirement

INFOID:0000000003133530

1.

PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

P2118

1

F6

1

F101

2

Existed

4

Not  existed

2

2

Not  existed

4

Existed

DTC

Electric throttle control actuator

ECM

Continuity

Bank

Connector

Terminal

Connector

Terminal

Electric throttle control actuator

Resistance

Bank

Terminals

1

1 and 2

Approx. 1 - 15 

Ω

 [at 25

°

C (77

°

F)]

2

5 and 6