Nissan March K13. Manual - part 246

 

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Nissan March K13. Manual - part 246

 

 

P1128 THROTTLE CONTROL MOTOR

EC-445

< DTC/CIRCUIT DIAGNOSIS >

[HR12DE (TYPE 2)]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

P1128 THROTTLE CONTROL MOTOR

DTC Logic

INFOID:0000000005886568

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-445, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005886569

1.

CHECK GROUND CONNECTION

1.

Turn ignition switch OFF.

2.

Check ground connection E38. Refer to Ground Inspection in 

XX-XX, "*****"

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.

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 harness or connectors.

3.

CHECK THROTTLE CONTROL MOTOR

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P1128

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

F29

5

F7

1

Not  existed

4

Existed

F29

6

F7

1

Existed

4

Not  existed

EC-446

< DTC/CIRCUIT DIAGNOSIS >

[HR12DE (TYPE 2)]

P1128 THROTTLE CONTROL MOTOR

Refer to 

XX-XX, "*****"

.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 5.

4.

CHECK INTERMITTENT INCIDENT

Refer to 

XX-XX, "*****"

.

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.

Perform 

XX-XX, "*****"

.

>> INSPECTION END

Component Inspection

INFOID:0000000005888562

1.

CHECK THROTTLE CONTROL MOTOR

1.

Disconnect electric throttle control actuator harness connector.

2.

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 electric throttle control actuator.

2.

Perform 

XX-XX, "*****"

.

>> INSPECTION END

Special Repair Requirement

INFOID:0000000006037448

1.

PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Perform throttle valve closed position learning. Refer to 

EC-105, "Work Procedure"

.

>> GO TO 2

2.

PERFORM IDLE AIR VOLUME LEARNING

Perform idle air volume learning. Refer to 

EC-106, "Work Procedure"

.

>> END

Terminals

Resistance [at 25

°

C (77

°

F)]

5 and 6

Approx. 1 - 15 

P1171 INTAKE ERROR

EC-447

< DTC/CIRCUIT DIAGNOSIS >

[HR12DE (TYPE 2)]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

P1171 INTAKE ERROR

DTC Logic

INFOID:0000000006044874

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

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

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start the engine and wait at least 5 seconds.

2.

Check 1st trip DTC.

Is 1st trip DTC detected?

YES

>> Go to 

EC-447, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006044875

1.

CHECK INTAKE AIR LEAK

1.

Start engine and run it at idle.

2.

Listen for an intake air leak after the air cleaner element.

Is intake air leak detected?

YES

>> GO TO 2.

NO

>> Repair or replace.

2.

CHECK VACUUM HOSE

Check intake manifold vacuum hoses for clogging or disconnection.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace.

3.

CHECK MAP SENSOR POWER SUPPLY CIRCUIT

1.

Disconnect manifold absolute pressure sensor harness connector.

2.

Turn ignition switch ON.

3.

Check the voltage between MAP sensor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

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

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P1171

Intake error

A high voltage from the sensor is sent to ECM 
under light load driving condition.

• Harness or connectors

(The manifold absolute pressure 
sensor circuit is open or shorted.)

• Manifold absolute pressure
• Intake air leaks
• Vacuum hoses

MAP sensor

Ground

Voltage (V)

Connector

Terminal

F50

2

Ground

Approx. 5

EC-448

< DTC/CIRCUIT DIAGNOSIS >

[HR12DE (TYPE 2)]

P1171 INTAKE ERROR

4.

CHECK MAP SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between MAP sensor harness connector and ECM harness connector.

4.

Also check harness for short to ground and power.

Is the inspection result normal?

YES

>> GO TO 5.

NO

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

5.

CHECK MAP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Check the continuity between MAP sensor harness connector and ECM harness connector.

2.

Also check harness for short to ground and power.

Is the inspection result normal?

YES

>> GO TO 6.

NO

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

6.

CHECK MAP SENSOR

Check map sensor. Refer to 

EC-402, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Replace MAP sensor.

7.

CHECK INTERMITTENT INCIDENT

Check intermittent incident. Refer to 

GI-33, "Intermittent Incident"

.

>> INSPECTION END

MAP sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

F50

4

F46

56

Existed

MAP sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

F50

1

F46

51

Existed

 

 

 

 

 

 

 

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