Diagnostic Procedure

1. Turn ignition switch OFF.
2. Loosen and retighten engine ground screws.
   Fig 1: Identifying Engine Ground

   Courtesy of NISSAN MOTOR CO., U.S.A.
   1. GO TO 2.

1. Disconnect electric throttle control actuator harness connector.
2. Turn ignition switch ON.
   Fig 2: Disconnecting Electric Throttle Control Actuator Harness Connector

   Courtesy of NISSAN MOTOR CO., U.S.A.
3. Check voltage between electric throttle control actuator terminal 1 and ground with CONSULT-II or tester.

   Voltage: Approximately 5V 

Fig 3: Checking Voltage Between Electric Throttle Control Actuator Terminal 1 & Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG 

1. OK: GO TO 3.
2. NG: Repair open circuit or short to ground or short to power in harness or connectors.

1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between electric throttle control actuator terminal 5 and engine ground. Refer to WIRING DIAGRAM .

   Continuity should exist. 

4. Also check harness for short to ground and short to power.

OK or NG 

1. OK: GO TO 4.
2. NG: Repair open circuit or short to ground or short to power in harness or connectors.

1. Check harness continuity between ECM terminal 50 and electric throttle control actuator terminal 4, ECM terminal 69 and electric throttle control actuator terminal 2.

   Refer to WIRING DIAGRAM .

   Continuity should exist. 

2. Also check harness for short to ground and short to power.

OK or NG 

1. OK: GO TO 5.
2. NG: Repair open circuit or short to ground or short to power in harness or connectors.

Refer to "COMPONENT INSPECTION ".

OK or NG 

1. OK: GO TO  7.
2. NG: GO TO 6.

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

Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

1. INSPECTION END