Nissan Versa

 Sedan Service Manual

Engine » Engine control system (EC) » P2101 electric throttle control function
Diagnosis Procedure

1.CHECK GROUND CONNECTION

1. Turn ignition switch OFF.
2. Check ground connection E15. Refer to Ground Inspection in GI, "Circuit Inspection".

Is the inspection result normal?

YES >> GO TO 2.

NO >> Repair or replace ground connection.

2.CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT

1. Turn ignition switch ON.
2. Check the voltage between ECM harness connector and ground. 

Is the inspection result normal?

YES >> GO TO 11.

NO >> GO TO 3.

3.CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT-I

1. Turn ignition switch OFF.
2. Check voltage between ECM harness connector and ground. 

Is the inspection result normal?

YES >> GO TO 7.

NO >> GO TO 4.

4.CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT-II

1. Disconnect ECM harness connector.
2. Disconnect IPDM E/R harness connector F42.
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 6.

NO >> GO TO 5.

5.DETECT MALFUNCTIONING PART

Check the following.

• IPDM E/R connector F42
• Harness for open or short between IPDM E/R and ECM

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

6.CHECK FUSE

1. Disconnect 20 A fuse (No. 53) from IPDM E/R.
2. Check 20 A fuse for blown.

Is the inspection result normal?

YES >> GO TO 10.

NO >> Replace 20 A fuse.

7.CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT-III

1. Disconnect ECM harness connector.
2. Disconnect IPDM E/R harness connector F42.
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 10.

NO >> GO TO 8.

8.DETECT MALFUNCTIONING PART

Check the following.

• IPDM E/R connector F42
• Harness for open or short between IPDM E/R and ECM

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

9.CHECK FUSE

1. Disconnect 15 A fuse (No. 52) from IPDM E/R.
2. Check 15 A fuse for blown.

Is the inspection result normal?

YES >> GO TO 10.

NO >> Replace 15 A fuse.

10.CHECK INTERMITTENT INCIDENT

Refer to GI, "Intermittent Incident".

Is the inspection result normal?

YES >> Replace IPDM E/R. Refer to PCS, "Removal and Installation" (WITH I-KEY) or PCS, "Removal and Installation" (WITHOUT I-KEY).

NO >> Repair or replace harness or connectors.

11.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 connector.                                                              
5. Also check harness for short to ground and short to power.

Is the inspection result normal?

YES >> GO TO 12.

NO >> Repair or replace harness or connectors.

12.CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY

1. Remove the intake air duct. Refer to EM, "Removal and Installation"
2. Check if foreign matter is caught between the throttle valve (1) and the housing.

•   Vehicle front

Is the inspection result normal?

YES >> GO TO 13.

NO >> Remove the foreign matter and clean the electric throttle control actuator inside, and then perform throttle valve closed position learning. Refer to EC, "Work Procedure".

13.CHECK THROTTLE CONTROL MOTOR

Refer to EC, "Component Inspection".

Is the inspection result normal?

YES >> GO TO 14.

NO >> GO TO 15.

14.CHECK INTERMITTENT INCIDENT

Refer to GI, "Intermittent Incident".

Is the inspection result normal?

YES >> GO TO 15.

NO >> Repair or replace harness or connectors.

15.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

Replace malfunction electric throttle control actuator. Refer to EM, "Removal and Installation".

>> INSPECTION END

Component Inspection

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

Replace electric throttle control actuator. Refer to EM, "Removal and Installation".

>> INSPECTION END

DTC Logic 

Diagnosis Procedure