Diagnostic Procedure

1. Turn ignition switch OFF
2. Loosen and retighten ground three screws on the body. Refer to "GROUND INSPECTION  ".
   Fig 1: Loosening And Retightening Ground Three Screws On The Body

   Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG 

1. OK: GO TO 2.
2. NG: Repair or replace ground connections.

1. Check voltage between ECM terminal 3 and ground under the following conditions with CONSULT-II or tester.
   ECM TERMINAL VOLTAGE REFERENCE
   
   

   Ignition switch	Voltage
   OFF	Approximately 0V
   ON	Battery voltage (11 - 14V)

   Fig 2: Checking Voltage Between ECM Terminal 3 And Ground

   Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG 

1. OK: GO TO  10 .
2. NG: GO TO 3.

1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Disconnect IPDM E/R harness connector E8.
4. Check continuity between ECM terminal 3 and IPDM E/R terminal 42. Refer to WIRING DIAGRAM  .
   1. Continuity should exist. 
5. Also check harness for short to ground and short to power.

OK or NG 

1. OK: GO TO  5 .
2. NG: GO TO 4.

Check the following.

• Harness connectors E19, F49
• Harness for open or short between ECM and IPDM E/R
  1. : Repair open circuit or short to ground or short to power in harness or connectors. 

1. Reconnect all harness connectors disconnected.
2. Turn ignition switch OFF.
3. Check voltage between ECM terminal 104 and ground with CONSULT-II or tester.
   1. Voltage: Battery voltage 

OK or NG 

1. OK: GO TO  9 .
2. NG: GO TO 6.

Fig 3: Checking Voltage Between ECM Terminal 104 And Ground

Courtesy of NISSAN MOTOR CO., U.S.A.

1. Disconnect ECM harness connector.
2. Disconnect IPDM E/R harness connector E9.
3. Check continuity between ECM terminal 104 and IPDM E/R terminal 47. Refer to WIRING DIAGRAM  .
   1. Continuity should exist. 
4. Also check harness for short to ground and short to power.

OK or NG 

1. OK: GO TO  8 .
2. NG: GO TO 7.

Check the following.

• Harness connectors E211, M41
• Harness for open or short between ECM and IPDM E/R
  1. : Repair open circuit or short to ground or short to power in harness or connectors.

1. Disconnect 15A fuse.
2. Check 15A fuse for blown.

OK or NG 

1. OK: GO TO 9.
2. NG: Replace 15A fuse.

Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT  ".

OK or NG 

1. OK: Replace IPDM E/R. Refer to "IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM) ".
2. NG: Repair or replace harness or connectors.

1. Turn ignition switch OFF.
2. Disconnect electric throttle control actuator harness connector.
3. Disconnect ECM harness connector.
4. Check harness continuity between the following terminals. Refer to WIRING DIAGRAM  .
   Fig 4: Checking Continuity Between Electric Throttle Control Actuator Terminals Reference Data

   Courtesy of NISSAN MOTOR CO., U.S.A.
   Fig 5: Identifying Electric Throttle Control Actuator Harness Connector

   Courtesy of NISSAN MOTOR CO., U.S.A.
5. Also check harness for short to ground and short to power.

OK or NG 

1. OK: GO TO 11.
2. NG: Repair or replace.

1. Remove the intake air duct.
2. Check if foreign matter is caught between the throttle valve and the housing.

OK or NG 

1. OK: GO TO 12.
2. NG: Remove the foreign matter and clean the electric throttle control actuator inside.

Fig 6: Identifying Electric Throttle Control Actuator

Courtesy of NISSAN MOTOR CO., U.S.A.

Refer to "COMPONENT INSPECTION  ".

OK or NG 

1. OK: GO TO 13.
2. NG: GO TO  14 .

Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT  ".

OK or NG 

1. OK: GO TO 14.
2. NG: Repair or replace harness or connectors.

1. Replace the electric throttle control actuator.
2. Perform "THROTTLE VALVE CLOSED POSITION LEARNING  ".
3. Perform "IDLE AIR VOLUME LEARNING  ".
   1. : INSPECTION END