Diagnostic Procedure

WARNING: This page is about a different car, the 2004 Nissan Titan. However, it is still accessible from the selected car via links, so may be relevant.

CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground three screws on the body.
  
  Fig 1: Locating Ground Screws
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Refer to GROUND INSPECTION .
OK or NG
1. OK: GO TO 2.
2. NG: Repair or replace ground connections.
CHECK THROTTLE CONTROL MOTOR OUTPUT SIGNAL CIRCUIT FOR OPEN OR SHORT
1. Disconnect electric throttle control actuator harness connector.
2. Disconnect ECM harness connector.
3. Check harness continuity between the following terminals.
  Refer to WIRING DIAGRAM .
4. Also check harness for short to ground and short to power.
  
  Fig 2: Locating Electric Throttle Control Actuator
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 3: Checking Harness Continuity
  Courtesy of NISSAN MOTOR CO., U.S.A.
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 in BASIC DIAGNOSTIC PROCEDURES - TITAN article.
3. Perform IDLE AIR VOLUME LEARNING in BASIC DIAGNOSTIC PROCEDURES - TITAN article.
1. INSPECTION END