Diagnostic Procedure

CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground screws on the body.
  Refer to "GROUND INSPECTION ".
  
  Fig 1: Identifying Body Ground Connections
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG

OK: GO TO 2.

NG: Repair or replace ground connections.
CHECK CRANKSHAFT POSITION (CKP) SENSOR (POS) POWER SUPPLY CIRCUIT-I
1. Disconnect crankshaft position (CKP) sensor (POS) (1) harness connector.
  - Drive shaft (RH) (2)
2. Turn ignition switch ON.
  
  Fig 2: Identifying Crankshaft Position Sensor Harness Connector
  Courtesy of NISSAN MOTOR CO., U.S.A.
3. Check voltage between CKP sensor (POS) terminal 1 and ground with CONSULT-III or tester.
  Voltage: Approximately 5V
  
  Fig 3: Checking Voltage Between CKP Sensor Terminal 1 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG

OK: GO TO 9.

NG: GO TO 3.
CHECK CKP SENSOR (POS) POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between CKP sensor (POS) terminal 1 and ECM terminal 76.
  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 REFERENCE

ECM terminal	Sensor terminal	Reference Wiring Diagram
72	Refrigerant pressure sensor terminal 3	"WIRING DIAGRAM "
76	Crankshaft position sensor (POS) terminal 1	"WIRING DIAGRAM "
87	APP sensor terminal 5	"WIRING DIAGRAM "
91	EVAP control system pressure sensor terminal 3	"WIRING DIAGRAM "

OK or NG

OK: GO TO 5.

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

CHECK REFRIGERANT PRESSURE SENSOR
Refer to "TROUBLE DIAGNOSIS ".

OK or NG

OK: GO TO 6.

NG: Replace refrigerant pressure sensor.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
Refer to "COMPONENT INSPECTION ".

OK or NG

OK: GO TO 7.

NG: Replace EVAP control system pressure sensor.
CHECK APP SENSOR
Refer to "COMPONENT INSPECTION ".

OK or NG

OK: GO TO 9.

NG: GO TO 8.
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 CKP SENSOR (POS) GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between CKP sensor (POS) terminal 2 and ECM terminal 60.
  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 10.

NG: Repair open circuit or short to ground or short to power in harness or connectors.
CHECK CKP SENSOR (POS) INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between CKP sensor (POS) terminal 3 and ECM terminal 65.
  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 11.

NG: Repair open circuit or 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 12.

NG: Replace crankshaft position sensor (POS).
CHECK GEAR TOOTH
Visually check for chipping signal plate gear tooth.

OK or NG

OK: GO TO 13.

NG: Replace the signal plate.
CHECK INTERMITTENT INCIDENT
Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

: INSPECTION END