Nissan Altima L32. Instruction — part 449

P2101 ELECTRIC THROTTLE CONTROL FUNCTION

EC-917

< COMPONENT DIAGNOSIS >

[QR25DE EXCEPT FOR CALIFORNIA]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

1. Check the voltage between ECM harness connector and

ground.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> GO TO 3.

3.

CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT

1. Disconnect ECM harness connector.

2. Disconnect IPDM E/R harness connector F10.

3. Check the continuity between ECM harness connector and IPDM E/R harness connector.

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

YES

>> GO TO 4.

NO

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

4.

CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-II

1. Check the continuity between ECM harness connector and IPDM E/R harness connector.

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

YES

>> GO TO 5.

NO

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

5.

CHECK FUSE

1. Disconnect 15A fuse (No. 42) from IPDM E/R.

2. Check 15A fuse for blown.
Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace 15A fuse.

6.

CHECK INTERMITTENT INCIDENT

Refer to

GI-42, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace IPDM E/R.

NO

>> Repair or replace harness or connectors.

7.

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.

ECM

Ground

Condition

Voltage

Connector

Terminal

F14

2

Ground

Ignition switch OFF

Approx. 0V

Ignition switch ON

Battery voltage

PBIA9568J

IPDM E/R

ECM

Continuity

Connector

Terminal

Connector

Terminal

F10

70

F14

15

Existed

IPDM E/R

ECM

Continuity

Connector

Terminal

Connector

Terminal

F10

54

F14

2

Existed

EC-918

< COMPONENT DIAGNOSIS >

[QR25DE EXCEPT FOR CALIFORNIA]

P2101 ELECTRIC THROTTLE CONTROL FUNCTION

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-918, "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-919, "Special Repair Requirement"

.

>> INSPECTION END

Component Inspection

INFOID:0000000004349898

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

P2101 ELECTRIC THROTTLE CONTROL FUNCTION

EC-919

< COMPONENT DIAGNOSIS >

[QR25DE EXCEPT FOR CALIFORNIA]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

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-919, "Special Repair Requirement"

.

>> INSPECTION END

Special Repair Requirement

INFOID:0000000004349899

1.

PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Refer to

EC-565, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"

>> GO TO 2.

2.

PERFORM IDLE AIR VOLUME LEARNING

Refer to

EC-566, "IDLE AIR VOLUME LEARNING : Special Repair Requirement"

>> END

Terminals

Resistance

5 and 6

Approx. 1 - 15

Ω [at 25 °C (77°F)]

PBIB2909E

EC-920

< COMPONENT DIAGNOSIS >

[QR25DE EXCEPT FOR CALIFORNIA]

P2118 THROTTLE CONTROL MOTOR

P2118 THROTTLE CONTROL MOTOR

Description

INFOID:0000000004349900

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:0000000004349901

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-920, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000004349902

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