Diagnostic Procedure

Models with FDC 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 Screws (Models With FDC System)

   Courtesy of NISSAN NORTH AMERICA, INC.

Models without FDC 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 Screws (Models Without FDC System)

   Courtesy of NISSAN NORTH AMERICA, INC.

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 And EVAP Control System Pressure Sensor

   Courtesy of NISSAN NORTH AMERICA, INC.
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 NORTH AMERICA, INC.

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 "COMPONENT INSPECTION ".

OK or NG 

OK: GO TO 8.

NG: Replace malfunctioning component.

Refer to "COMPONENT INSPECTION ".

OK or NG 

OK: GO TO  20.

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.

1. Disconnect rubber tube connected to EVAP canister vent control valve.
2. Check the rubber tube for clogging, vent and kinked.

OK or NG 

OK: GO TO 15.

NG: Clean the rubber tube using an air blower.

Refer to "COMPONENT INSPECTION ".

OK or NG 

OK: GO TO 16.

NG: Replace EVAP canister vent control valve.

Refer to "COMPONENT INSPECTION ".

OK or NG 

OK: GO TO 17.

NG: Replace EVAP control system pressure sensor.

1. Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor attached.
2. Does water drain from the EVAP canister?

Yes or No 

Yes: GO TO 18.

No: GO TO  20.

Fig 5: Checking EVAP Canister For Water Drain

Courtesy of NISSAN NORTH AMERICA, INC.

Weigh the EVAP canister with the EVAP canister vent control valve and EVAP control system pressure sensor attached.

The weight should be less than 2.2 kg (4.9 lb)  .

OK or NG 

OK: GO TO  20.

NG: GO TO 19.

Check the following.

• EVAP canister for damage
• EVAP hose between EVAP canister and vehicle frame for clogging or poor connection

  : Repair hose or replace EVAP canister.

Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

: INSPECTION END