Diagnosis Procedure

CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground screws on the body.
  Refer to "GROUND INSPECTION ".
  - <= : Vehicle front
  - Body ground (1)
    OK or NG
    
    OK: GO TO 2.
    
    NG: Repair or replace ground connections.
    
    Fig 1: Identifying Body Ground Screws
    Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR FOR WATER
1. Disconnect EVAP control system pressure sensor (1) harness connector.
  - This illustration is a view from under vehicle
  - EVAP canister (2)
  - EVAP canister vent control valve (3)
2. Check sensor harness connector for water.
  Water should not exist.
  
  Fig 2: Identifying EVAP Control System Pressure Sensor, EVAP Canister And EVAP Canister Vent Control Valve
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  OK or NG
  
  OK: GO TO 3.
  
  NG: Repair or replace harness connector.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
Refer to "COMPONENT INSPECTION ".

OK or NG

OK: GO TO 4.

NG: Replace EVAP control system pressure sensor.

CHECK POWER SUPPLY CIRCUITS

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

ECM TERMINAL REFERENCE

ECM terminal	Sensor terminal	Reference Wiring Diagram
69	Tumble control valve position sensor terminal 1	"WIRING DIAGRAM "
74	Refrigerant pressure sensor terminal 3	"WIRING DIAGRAM "
75	Crankshaft position sensor (POS) terminal 1	"WIRING DIAGRAM "
76	EVAP control system pressure sensor terminal 3	"WIRING DIAGRAM "
102	APP sensor terminal 5	"WIRING DIAGRAM "

OK or NG

OK: GO TO 5.

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

CHECK TUMBLE CONTROL VALVE POSITION SENSOR
Refer to "DIAGNOSIS PROCEDURE ".

OK or NG

OK: GO TO 6.

NG: Replace intake manifold adapter.
CHECK REFRIGERANT PRESSURE SENSOR
Refer to TROUBLE DIAGNOSIS .

OK or NG

OK: GO TO 7.

NG: Replace refrigerant pressure sensor.
CHECK CRANKSHAFT POSITION SENSOR (POS)
Refer to "COMPONENT INSPECTION ".

OK or NG

OK: GO TO 8.

NG: Replace crankshaft position sensor (POS).
CHECK APP SENSOR
Refer to "COMPONENT INSPECTION ".

OK or NG

OK: GO TO 10.

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 INTERMITTENT INCIDENT
Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .

For wiring diagram, refer to "WIRING DIAGRAM ".

INSPECTION END