Diagnostic Procedure

CHECK STARTING SYSTEM
Turn ignition switch to START position.
1. Does the engine turn over?
2. Does the starter motor operate?
Yes or No
1. Yes: GO TO 2.
2. No: Check starting system. (Refer to "STARTING SYSTEM ".)
CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body.
  Refer to "GROUND INSPECTION ".
  
  Fig 1: Locating Three Ground Screws On Body
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 3.
2. NG: Repair or replace ground connections.
CHECK CAMSHAFT POSITION (CMP) SENSOR (PHASE) POWER SUPPLY CIRCUIT
1. Disconnect camshaft position (CMP) sensor (PHASE) harness connector.
2. Turn ignition switch ON.
  
  Fig 2: Disconnecting Camshaft Position (CMP) Sensor (PHASE) Harness Connector
  Courtesy of NISSAN MOTOR CO., U.S.A.
3. Check voltage between CMP sensor (PHASE) terminal 3 and ground with CONSULT-II or tester.
  1. Voltage: Battery voltage
4. Also check harness for short to ground and short to power.
OK or NG
1. OK: GO TO 5.
2. NG: GO TO 4.
Fig 3: Checking Voltage Between CMP Sensor (PHASE) Terminal 3
Courtesy of NISSAN MOTOR CO., U.S.A.
DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors F105, M135
- Harness for open or short between ECM and camshaft position sensor (PHASE)
- Harness for open or short between ECM relay and camshaft position sensor (PHASE)
  1. Repair open circuit or short to ground or short to power in harness or connectors.
CHECK CMP SENSOR (PHASE) GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Check harness continuity between CMP sensor (PHASE) terminal 1 and ground.
  Refer to WIRING DIAGRAM .
  1. Continuity should exist.
3. Also check harness for short to power.
OK or NG
1. OK: GO TO 7.
2. NG: GO TO 6.
DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors F32, E32
- Harness for open or short between camshaft position sensor (PHASE) and ground
  1. Repair open circuit or short to power in harness or connectors.
CHECK CMP SENSOR (PHASE) INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 14 and CMP sensor (PHASE) terminal 2.
  Refer to WIRING DIAGRAM .
  1. Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
1. OK: GO TO 8.
2. 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
1. OK: GO TO 9.
2. NG: Replace camshaft position sensor (PHASE).
CHECK INTERMITTENT INCIDENT
Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".
1. INSPECTION END