Diagnostic Procedure

1. Turn ignition switch OFF.
2. Loosen and retighten engine two screws on the body.

   Refer to "GROUND INSPECTION ".

   Fig 1: Locating M28 & M54 Body Ground Screws

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

OK or NG 

OK: GO TO  2.

NG: Repair or replace ground connections.

1. Disconnect electric throttle control actuator harness connector.
Fig 2: Disconnecting Electric Throttle Control Actuator Harness Connector
Courtesy of NISSAN MOTOR CO., U.S.A.
2. Disconnect ECM harness connector.
3. Check harness continuity between the following terminals.

   Refer to WIRING DIAGRAM .

   TERMINAL CONTINUITY SPECIFICATION
   
   

   Electric throttle control actuator terminal	ECM terminal	Continuity
   3	4	Should exist
   	5	Should not exist
   6	4	Should not exist
   	5	Should exist

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

OK or NG 

OK: GO TO  3.

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

Refer to "COMPONENT INSPECTION ".

OK or NG 

OK: GO TO  4.

NG: GO TO  5.

Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

OK or NG 

OK: GO TO  5.

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 ".

   : INSPECTION END