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)
Fig 1: Identifying Body Ground
Courtesy of NISSAN NORTH AMERICA, INC.

OK or NG

OK: GO TO 2.

NG: Repair or replace ground connections.
CHECK TUMBLE CONTROL VALVE POSITION SENSOR POWER SUPPLY CIRCUIT-I
1. Reconnect ECM harness connector disconnected.
2. Turn ignition switch ON.
3. Check voltage between tumble control valve actuator terminal 1 and ground with CONSULT or tester.
Voltage: Battery voltage

Fig 2: Checking Voltage Between Tumble Control Valve Actuator Harness Connector Terminal 1 And Ground
Courtesy of NISSAN NORTH AMERICA, INC.

OK or NG

OK: GO TO 10.

NG: GO TO 3.
CHECK TUMBLE CONTROL VALVE POSITION SENSOR POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between tumble control valve actuator terminal 1 and ECM terminal 69.
Refer to Wiring Diagram .

Continuity should exist .

OK or NG

OK: GO TO 4.

NG: Repair open circuit.

CHECK POWER SUPPLY CIRCUITS

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

ECM terminal	Sensor terminal	Reference Wiring Diagram
69	Tumble control valve actuator 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 CRANKSHAFT POSITION SENSOR (POS)
Refer to "COMPONENT INSPECTION ".

OK or NG

OK: GO TO 6.

NG: Replace crankshaft position sensor (POS). Refer to CYLINDER BLOCK .
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
Refer to "COMPONENT INSPECTION ".

OK or NG

OK: GO TO 7.

NG: Replace EVAP control system pressure sensor. Refer to REMOVAL AND INSTALLATION .
CHECK REFRIGERANT PRESSURE SENSOR
Refer to TROUBLE DIAGNOSIS .

OK or NG

OK: GO TO 8.

NG: Replace refrigerant pressure sensor. Refer to INSTALLATION .
CHECK APP SENSOR
Refer to "COMPONENT INSPECTION ".

OK or NG

OK: GO TO 12.

NG: GO TO 9.
REPLACE ACCELERATOR PEDAL ASSEMBLY
Replace accelerator pedal assembly. Refer to , "REMOVAL AND INSTALLATION ".

INSPECTION END
CHECK TUMBLE CONTROL VALVE POSITION SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between tumble control valve actuator terminal 2 and ECM terminal 47.
  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 11.

NG: Repair open circuit or short to ground or short to power in harness or connectors.
CHECK TUMBLE CONTROL VALVE POSITION SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between tumble control valve actuator terminal 3 and ECM terminal 35.
  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 12.

NG: Repair open circuit or short to ground or short to power in harness or connectors.
CHECK INTERMITTENT INCIDENT
Refer to "DESCRIPTION ".

OK or NG

OK: Replace intake manifold adapter. Refer to INTAKE MANIFOLD .

NG: Repair or replace harness or connectors.