Diagnosis Procedure

CHECK GROUND CONNECTIONS
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.
CHECK CONNECTOR
1. Disconnect EVAP control system pressure sensor harness connector.
  
  Fig 3: Identifying EVAP Control System Pressure Sensor Harness Connector
  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.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY CIRCUIT-I
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.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY CIRCUIT-II
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.
DETECT MALFUNCTIONING PART
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 EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY CIRCUIT-III

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

ECM TERMINAL REFERENCE

ECM terminal	Sensor terminal	Reference Wiring Diagram
46	CKP sensor (POS) terminal 1	WIRING DIAGRAM
64	CMP sensor (PHASE) (bank 2) terminal 1	WIRING DIAGRAM
64	EVT control position sensor (bank 2) terminal 1	WIRING DIAGRAM
103	APP sensor terminal 4	WIRING DIAGRAM
107	EVAP control system pressure sensor terminal 3	WIRING DIAGRAM
111	Refrigerant pressure sensor 1	WIRING DIAGRAM

OK or NG

OK: GO TO 7.

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

CHECK COMPONENTS
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.
CHECK APP SENSOR
Refer to "COMPONENT INSPECTION ".

OK or NG

OK: GO TO 20.

NG: GO TO 9.
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 ".
  INSPECTION END
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
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.
DETECT MALFUNCTIONING PART
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.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
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.
DETECT MALFUNCTIONING PART
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.
CHECK RUBBER TUBE
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.
CHECK EVAP CANISTER VENT CONTROL VALVE
Refer to "COMPONENT INSPECTION ".

OK or NG

OK: GO TO 16.

NG: Replace EVAP canister vent control valve.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
Refer to "COMPONENT INSPECTION ".

OK or NG

OK: GO TO 17.

NG: Replace EVAP control system pressure sensor.
CHECK IF EVAP CANISTER SATURATED WITH WATER
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: Identifying EVAP Canister And EVAP Canister Vent Control Valve
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK EVAP CANISTER
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.
DETECT MALFUNCTIONING PART
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.
CHECK INTERMITTENT INCIDENT
Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .

INSPECTION END