Diagnostic Procedure

CHECK STARTING SYSTEM
Turn ignition switch to START position.

Does the engine turn over?

Does the starter motor operate?

Yes or No

Yes: GO TO 2.

No: Check starting system. (Refer to "STARTING SYSTEM ".)
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 3.

NG: Repair or replace ground connections.
CHECK CAMSHAFT POSITION (CMP) SENSOR (PHASE) POWER SUPPLY CIRCUIT
1. Disconnect camshaft position (CMP) sensor (PHASE) (1) harness connector.
  - <==: Vehicle front
2. Turn ignition switch ON.
  
  Fig 2: Identifying Camshaft Position (CMP) Sensor (PHASE) Harness Connector
  Courtesy of NISSAN MOTOR CO., U.S.A.
3. Check voltage between CMP sensor (PHASE) terminal 1 and ground with CONSULT-III or tester.
  Voltage: Approximately 5V
OK or NG

OK: GO TO 4.

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

Fig 3: Checking Voltage Between CKP Sensor Terminal 1 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK CMP SENSOR (PHASE) GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between CMP sensor (PHASE) terminal 2 and ECM terminal 64.
  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 5.

NG: Repair open circuit or short to ground or short to power in harness or connectors.
CHECK CMP SENSOR (PHASE) INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between CMP sensor (PHASE) terminal 3 and ECM terminal 69.
  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 6.

NG: Repair open circuit or short to ground or short to power in harness or connectors.
CHECK CAMSHAFT POSITION SENSOR (PHASE)
Refer to "COMPONENT INSPECTION ".

OK or NG

OK: GO TO 7.

NG: Replace camshaft position sensor (PHASE).
CHECK CAMSHAFT (INTAKE)
Check the following.
- Accumulation of debris to the signal plate of camshaft (1) rear end
- Chipping signal plate of camshaft rear end
OK or NG

OK: GO TO 8.

NG: Remove debris and clean the signal plate of camshaft rear end or replace camshaft.

Fig 4: Identifying Camshaft (Intake)
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK INTERMITTENT INCIDENT
Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

: INSPECTION END