Nissan Altima L32. Manual - part 325

P2101 ELECTRIC THROTTLE CONTROL FUNCTION

EC-421

< COMPONENT DIAGNOSIS >

[QR25DE FOR CALIFORNIA]

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5. Also check harness for short to ground and short to power.
Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Repair or replace.

8.

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 9.

NO

>> Remove the foreign matter and clean the electric throttle

control actuator inside.

9.

CHECK THROTTLE CONTROL MOTOR

Refer to 

EC-421, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 10.

NO

>> GO TO 11.

10.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-42, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> GO TO 11.

NO

>> Repair or replace harness or connectors.

11.

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1. Replace malfunction electric throttle control actuator.

2. Go to 

EC-422, "Special Repair Requirement"

.

>> INSPECTION END

Component Inspection

INFOID:0000000004349472

1.

CHECK THROTTLE CONTROL MOTOR

1. Disconnect electric throttle control actuator harness connector.

Electric throttle control actuator

ECM

Continuity

Connector

Terminal

Connector Terminal

F57

5

F14

5

Not existed

6

Existed

6

5

Existed

6

Not existed

2.

Electric throttle control actuator

: Vehicle front

ALBIA0061ZZ

EC-422

< COMPONENT DIAGNOSIS >

[QR25DE FOR CALIFORNIA]

P2101 ELECTRIC THROTTLE CONTROL FUNCTION

2. Check resistance between electric throttle control actuator termi-

nals as follows.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 2.

2.

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1. Replace electric throttle control actuator.

2. Go to 

EC-422, "Special Repair Requirement"

.

>> INSPECTION END

Special Repair Requirement

INFOID:0000000004349473

1.

PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Refer to 

EC-29, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"

>> GO TO 2.

2.

PERFORM IDLE AIR VOLUME LEARNING

Refer to 

EC-30, "IDLE AIR VOLUME LEARNING : Special Repair Requirement"

>> END

Terminals

Resistance

5 and 6

Approx. 1 - 15 

Ω [at 25 °C (77°F)]

PBIB2909E

P2118 THROTTLE CONTROL MOTOR

EC-423

< COMPONENT DIAGNOSIS >

[QR25DE FOR CALIFORNIA]

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P2118 THROTTLE CONTROL MOTOR

Description

INFOID:0000000004349474

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:0000000004349475

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-423, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000004349476

1.

CHECK GROUND CONNECTION

1. Turn ignition switch OFF.

2. Check ground connection E9. Refer to Ground Inspection in 

GI-45, "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

P2118

Throttle control motor 
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)

Electric throttle control actuator

ECM

Continuity

Connector

Terminal

Connector Terminal

F57

5

F14

5

Not existed

6

Existed

6

5

Existed

6

Not existed

EC-424

< COMPONENT DIAGNOSIS >

[QR25DE FOR CALIFORNIA]

P2118 THROTTLE CONTROL MOTOR

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.

3.

CHECK THROTTLE CONTROL MOTOR

Refer to 

EC-424, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 5.

4.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-42, "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 electric throttle control actuator.

2. Go to 

EC-424, "Special Repair Requirement"

.

>> INSPECTION END

Component Inspection

INFOID:0000000004349477

1.

CHECK THROTTLE CONTROL MOTOR

1. Disconnect electric throttle control actuator harness connector.

2. Check resistance between electric throttle control actuator termi-

nals as follows.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 2.

2.

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1. Replace electric throttle control actuator.

2. Go to 

EC-424, "Special Repair Requirement"

.

>> INSPECTION END

Special Repair Requirement

INFOID:0000000004349478

1.

PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Refer to 

EC-29, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"

>> GO TO 2.

2.

PERFORM IDLE AIR VOLUME LEARNING

Refer to 

EC-30, "IDLE AIR VOLUME LEARNING : Special Repair Requirement"

>> END

Terminals

Resistance

5 and 6

Approx. 1 - 15 

Ω [at 25 °C (77°F)]

PBIB2909E