Diagnostic Procedure

1. CHECK GROUND CONNECTIONS 
   1. Turn ignition switch OFF.
   2. Loosen and retighten ground screw on the body.

      Refer to "GROUND INSPECTION ".

      Fig 1: Identifying E24, E15 Body Ground And F9, F16 Engine Ground Screws

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

   OK or NG 

   OK >> GO TO 2.

   NG >> Repair or replace ground connections.

2. CHECK THROTTLE POSITION SENSOR 2 POWER SUPPLY CIRCUIT 
   1. Disconnect electric throttle control actuator (1) harness connector.
      • <=: Vehicle front
   2. Turn ignition switch ON.
      Fig 2: Identifying Electric Throttle Control Actuator

      Courtesy of NISSAN MOTOR CO., U.S.A.
   3. Check voltage between electric throttle control actuator terminal 2 and ground with CONSULT-II or tester.

      Voltage: Approximately 5V 

   OK or NG 

   OK >> GO TO 3.

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

   Fig 3: Checking Voltage Between Electric Throttle Control Actuator Terminal 2 And Ground

   Courtesy of NISSAN MOTOR CO., U.S.A.
3. CHECK THROTTLE POSITION SENSOR 2 GROUND CIRCUIT FOR OPEN AND SHORT 
   1. Turn ignition switch OFF.
   2. Disconnect ECM harness connector.
   3. Check harness continuity between electric throttle control actuator terminal 4 and ECM terminal 36.

      Refer to WIRING DIAGRAM .

      Continuity should exist. 

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

   OK or NG 

   OK >> GO TO 4.

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

4. CHECK THROTTLE POSITION SENSOR 2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 
   1. Check harness continuity between ECM terminal 34 and electric throttle control actuator terminal 3.

      Refer to WIRING DIAGRAM .

      Continuity should exist. 

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

   OK or NG 

   OK >> GO TO 5.

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

5. CHECK THROTTLE POSITION SENSOR 

   Refer to "COMPONENT INSPECTION ".

   OK or NG 

   OK >> GO TO  7.

   NG >> GO TO 6.

6. 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 ".

      >> INSPECTION END 

7. CHECK INTERMITTENT INCIDENT 

   Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

>> INSPECTION END