Nissan Cube. Manual — part 373

EC-378

< DTC/CIRCUIT DIAGNOSIS >

[MR18DE]

P2101 ELECTRIC THROTTLE CONTROL FUNCTION

2.

Perform

EC-378, "Special Repair Requirement"

.

>> INSPECTION END

Component Inspection

INFOID:0000000009947505

1.

CHECK THROTTLE CONTROL MOTOR

1.

Turn ignition switch OFF.

2.

Disconnect electric throttle control actuator harness connector.

3.

Check the resistance between electric throttle control actuator terminals as per the following.

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

EC-378, "Special Repair Requirement"

.

>> INSPECTION END

Special Repair Requirement

INFOID:0000000009947506

1.

PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Refer to

EC-19, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"

.

>> GO TO 2.

2.

PERFORM IDLE AIR VOLUME LEARNING

Refer to

EC-20, "IDLE AIR VOLUME LEARNING : Special Repair Requirement"

.

>> END

Terminals

Resistance

5 and 6

Approx. 1 - 15

Ω

[at 25

°

C (77

°

F)]

P2118 THROTTLE CONTROL MOTOR

EC-379

< DTC/CIRCUIT DIAGNOSIS >

[MR18DE]

C

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P2118 THROTTLE CONTROL MOTOR

Description

INFOID:0000000009947507

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. ECM controls the throttle valve opening angle in response to driving conditions via the throt-
tle control motor.

DTC Logic

INFOID:0000000009947508

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-379, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009947509

1.

CHECK GROUND CONNECTION

1.

Turn ignition switch OFF.

2.

Check ground connection E38. Refer to

GI-43, "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

F29

5

F7

1

Not existed

4

Existed

6

1

Existed

4

Not existed

EC-380

< DTC/CIRCUIT DIAGNOSIS >

[MR18DE]

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-380, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 5.

4.

CHECK INTERMITTENT INCIDENT

Refer to

GI-40, "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.

Perform

EC-380, "Special Repair Requirement"

.

>> INSPECTION END

Component Inspection

INFOID:0000000009947510

1.

CHECK THROTTLE CONTROL MOTOR

1.

Turn ignition switch OFF.

2.

Disconnect electric throttle control actuator harness connector.

3.

Check the resistance between electric throttle control actuator terminals as per the following.

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

EC-378, "Special Repair Requirement"

.

>> INSPECTION END

Special Repair Requirement

INFOID:0000000009947511

1.

PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Refer to

EC-19, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"

.

>> GO TO 2.

2.

PERFORM IDLE AIR VOLUME LEARNING

Refer to

EC-20, "IDLE AIR VOLUME LEARNING : Special Repair Requirement"

.

>> END

Terminals

Resistance

5 and 6

Approx. 1 - 15

Ω

[at 25

°

C (77

°

F)]

P2119 ELECTRIC THROTTLE CONTROL ACTUATOR

EC-381

< DTC/CIRCUIT DIAGNOSIS >

[MR18DE]

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EC

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P2119 ELECTRIC THROTTLE CONTROL ACTUATOR

Description

INFOID:0000000009947512

Electric throttle control actuator consists of throttle control motor, throttle position sensor, etc.
The throttle control motor is operated by the ECM and it opens and closes the throttle valve.
The throttle position sensor detects the throttle valve position, and feeds the voltage signal to the ECM. The
ECM judges the current opening angle of the throttle valve and controls the throttle valve opening angle in
response to driving conditions via the throttle control motor.

DTC Logic

INFOID:0000000009947513

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 FOR MALFUNCTION A AND B

1.

Turn ignition switch ON and wait at least 1 second.

2.

Set selector lever to D (CVT) or 1st (M/T) position and wait at least 3 seconds.

3.

Set selector lever to P (CVT) or Neutral (M/T) position.

4.

Turn ignition switch OFF and wait at least 10 seconds.

5.

Turn ignition switch ON and wait at least 1 second.

6.

Set selector lever to D (CVT) or 1st (M/T) position and wait at least 3 seconds.

7.

Set selector lever to P (CVT) or Neutral (M/T) position.

8.

Turn ignition switch OFF, wait at least 10 seconds and then turn ON.

9.

Check DTC.

Is DTC detected?

YES

>> Go to

EC-381, "Diagnosis Procedure"

.

NO

>> GO TO 3.

3.

PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION C

1.

Turn ignition switch ON and wait at least 1 second.

2.

Set selector lever to D (CVT) or 1st (M/T) position and wait at least 3 seconds.

3.

Set selector lever to P (CVT) or Neutral (M/T) position.

4.

Start engine and let it idle for 3 seconds.

5.

Check DTC.

Is DTC detected?

YES

>> Go to

EC-381, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009947514

1.

CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY

1.

Turn ignition switch OFF.

2.

Remove the intake air duct. Refer to

EM-24, "Exploded View"

.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P2119

Electric throttle control
actuator

A

Electric throttle control actuator does not function
properly due to the return spring malfunction.

• Electric throttle control actuator

B

Throttle valve opening angle in fail-safe mode is
not in specified range.

C

ECM detect the throttle valve is stuck open.