Diagnosis Procedure

Regarding Wiring Diagram information, refer to "WIRING DIAGRAM-ENGINE CONTROL SYSTEM- ".

1. CHECK GROUND CONNECTION
   1. Turn ignition switch OFF.
   2. Check ground connection E9. Refer to Ground Inspection in "CIRCUIT INSPECTION ".

      Is the inspection result normal? 

      YES: GO TO 2.

      NO: Repair or replace ground connection.

2. CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT
   1. Disconnect accelerator pedal position (APP) sensor harness connector.
   2. Turn ignition switch ON.
   3. Check the voltage between APP sensor harness connector and ground.

      APP sensor		Ground	Voltage (V)
      Connector	Terminal
      E40	5	Ground	Approx. 5

      Fig 1: Checking Voltage Between APP Sensor Terminal 5 And Ground

      Courtesy of NISSAN NORTH AMERICA, INC.

      Is the inspection result normal? 

      YES: GO TO 3.

      NO: Repair open circuit, short to ground or short to power in harness or connectors.

3. CHECK APP SENSOR 1 GROUND CIRCUIT FOR OPEN AND SHORT
   1. Turn ignition switch OFF.
   2. Disconnect ECM harness connector.
   3. Check the continuity between APP sensor harness connector and ECM harness connector.

      APP sensor		ECM		Continuity
      Connector	Terminal	Connector	Terminal
      E40	4	E10	84	Existed

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

      Is the inspection result normal? 

      YES: GO TO 4.

      NO: Repair open circuit, short to ground or short to power in harness or connectors.

4. CHECK APP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
   1. Check the continuity between APP sensor harness connector and ECM harness connector.

      APP sensor		ECM		Continuity
      Connector	Terminal	Connector	Terminal
      E40	3	E10	81	Existed

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

      Is the inspection result normal? 

      YES: GO TO 5.

      NO: Repair open circuit, short to ground or short to power in harness or connectors.

5. CHECK APP SENSOR

   Refer to "COMPONENT INSPECTION ".

   Is the inspection result normal? 

   YES: GO TO  7.

   NO: GO TO 6.

6. REPLACE ACCELERATOR PEDAL ASSEMBLY
   1. Replace accelerator pedal assembly. Refer to REMOVAL AND INSTALLATION .
   2. Refer to "SPECIAL REPAIR REQUIREMENT ".

      : INSPECTION END

7. CHECK INTERMITTENT INCIDENT

   Refer to "INTERMITTENT INCIDENT ".

   : INSPECTION END