Diagnosis Procedure

Models with VDC system, navigation system or telephone 

1. Turn ignition switch OFF.
2. Loosen and retighten ground screws on the body. Refer to "GROUND INSPECTION ".
   Fig 1: Identifying Body Ground E17 And Body Ground E43

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

Models without VDC system, navigation system and telephone 

1. Turn ignition switch OFF.
2. Loosen and retighten ground screws on the body. Refer to "GROUND INSPECTION ".
   Fig 2: Identifying Body Ground E17 And Body Ground E43

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

   OK or NG 

   OK: GO TO 2.

   NG: Repair or replace ground connections.

1. Disconnect EVAP control system pressure sensor harness connector.
   Fig 3: Identifying EVAP Canister Vent Control Valve

   Courtesy of NISSAN MOTOR CO., U.S.A.
2. Check sensor harness connector for water.

   Water should not exist  .

   OK or NG 

   OK: GO TO 3.

   NG: Repair or replace harness connector.

1. Turn ignition switch ON.
2. Check voltage between EVAP control system pressure sensor terminal 3 and ground with CONSULT-III or tester.

   Voltage: Approximately 5V 

   OK or NG 

   OK: GO TO  10.

   NG: GO TO 4.

   Fig 4: Checking Voltage Between EVAP Control System Pressure Sensor Terminal 3 And Ground

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

1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between EVAP control system pressure sensor terminal 3 and ECM terminal 107. Refer to WIRING DIAGRAM .

   Continuity should exist  .

   OK or NG 

   OK: GO TO  6.

   NG: GO TO 5.

Check the following.

1. Harness connectors T2, B44
2. Harness connectors B1, M12
3. Harness for open between ECM and EVAP control system pressure sensor.

   Repair open circuit.

Check harness for short to power and short to ground, between the following terminals.

OK or NG 

OK: GO TO 7.

NG: Repair short to ground or short to power in harness or connectors.

Check the following.

• Crankshaft position sensor (POS) (Refer to "COMPONENT INSPECTION ").
• Camshaft position sensor (PHASE) (bank 2) (Refer to "COMPONENT INSPECTION ").
• Exhaust valve timing control position sensor (bank 2) (Refer to "COMPONENT INSPECTION ").
• Refrigerant pressure sensor (Refer to MAGNET CLUTCH CIRCUIT ).

  OK or NG 

  OK: GO TO 8.

  NG: Replace malfunctioning component.

Refer to "COMPONENT INSPECTION ".

OK or NG 

OK: GO TO  15.

NG: GO TO 9.

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 ".

   INSPECTION END 

1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between EVAP control system pressure sensor terminal 1 and ECM terminal 112. 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  12.

   NG: GO TO 11.

Check the following.

• Harness connectors T2, B44
• Harness connectors B1, M12
• Harness for open or short between EVAP control system pressure sensor and ECM

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

1. Check harness continuity between ECM terminal 102 and EVAP control system pressure sensor terminal 2. 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  14.

   NG: GO TO 13.

Check the following.

• Harness connectors T2, B44
• Harness connectors B1, M12
• Harness for open or short between EVAP control system pressure sensor and ECM

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

Refer to "COMPONENT INSPECTION ".

OK or NG 

OK: GO TO 15.

NG: Replace EVAP control system pressure sensor.

Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .

INSPECTION END