Diagnostic Procedure

RETIGHTEN GROUND SCREWS
1. Turn ignition switch OFF.
2. Loosen and retighten engine ground screws.
  
  Fig 1: Retightening Engine Ground Screws
  Courtesy of NISSAN MOTOR CO., U.S.A.
1. GO TO 2.
CHECK ACCELERATOR PEDAL POSITION SENSOR 1 POWER SUPPLY CIRCUIT
1. Disconnect accelerator pedal position (APP) sensor harness connector.
2. Turn ignition switch ON.
  
  Fig 2: Disconnecting Accelerator Pedal Position (APP) Sensor Harness Connector
  Courtesy of NISSAN MOTOR CO., U.S.A.
3. Check voltage between APP sensor terminal 12 and ground with CONSULT-II or tester.
  
  Fig 3: Checking Voltage Between APP Sensor Terminal 12 And Ground With CONSULT-II Or Tester
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Voltage: Approximately 5V
OK or NG
1. OK: GO TO 5 .
2. NG: GO TO 3.
CHECK SENSOR POWER SUPPLY CIRCUITS
Check harness for short to power and short to ground, between the following terminals.
- ECM terminal 48 and EVAP control system pressure sensor terminal 3. Refer to "WIRING DIAGRAM " .
- ECM terminal 68 and power steering pressure sensor terminal 1. Refer to "WIRING DIAGRAM " .
- ECM terminal 49 and refrigerant pressure sensor terminal 3. Refer to "WIRING DIAGRAM " .
- ECM terminal 90 and APP sensor terminal 12. Refer to "WIRING DIAGRAM " .
OK or NG
1. OK: GO TO 4.
2. NG: Repair short to ground or short to power in harness or connectors.
CHECK COMPONENTS
Check the following.
- Refrigerant pressure sensor (Refer to "COMPONENT INSPECTION " .)
- Power steering pressure sensor (Refer to "COMPONENT INSPECTION " .)
- EVAP control system pressure sensor (Refer to "DIAGNOSTIC PROCEDURE " .)
OK or NG
1. OK: GO TO 7 .
2. NG: Replace malfunctioning component.
CHECK APP SENSOR
to "COMPONENT INSPECTION " .

OK or NG
1. OK: GO TO 7 .
2. NG: GO TO 6.
REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace accelerator pedal assembly.
2. Perform "ACCELERATOR PEDAL RELEASED POSITION LEARNING " .
3. Perform "THROTTLE VALVE CLOSED POSITION LEARNING " .
4. Perform "IDLE AIR VOLUME LEARNING " .
1. INSPECTION END
REPLACE ACCELERATOR PEDAL ASSEMBLY
to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT " .
1. INSPECTION END