Diagnostic Procedure

CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten two engine ground screws. Refer to "GROUND INSPECTION ".
OK or NG
1. OK : GO TO 2.
2. NG : Repair or replace ground connections.
  
  Fig 1: Checking Engine Ground Connections
  Courtesy of NISSAN MOTOR CO., U.S.A.
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 harness continuity between the following terminals.
  Refer to Wiring Diagram .
  
  Fig 2: Continuity Table
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 3: Identifying Electric Throttle Control Actuator And Throttle Body
  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 3.
2. NG : Repair or replace.
CHECK THROTTLE CONTROL MOTOR
Refer to "COMPONENT INSPECTION ".

OK or NG
1. OK : GO TO 4.
2. NG : GO TO 5.
CHECK INTERMITTENT INCIDENT
Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

OK or NG
1. OK : GO TO 5.
2. NG : Repair or replace harness or connectors.
REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace the electric throttle control actuator.
2. Perform "THROTTLE VALVE CLOSED POSITION LEARNING ".
3. Perform "IDLE AIR VOLUME LEARNING ".
1. : INSPECTION END