2004 Infiniti I35FACTORY OEM SERVICE PROCEDURE

Diagnostic Procedure

  1. CHECK STARTING SYSTEM 

    Turn ignition switch to START position.

    Does the engine turn over? 

    Does the starter motor operate? 

    Yes or No 

    1. Yes: GO TO 2.
    2. No: Check starting system. (Refer to STARTING SYSTEM .)
  2. RETIGHTEN GROUND SCREWS 
    1. Turn ignition switch OFF.
    2. Loosen and retighten engine ground screws. See Figure .
    1. : GO TO 3.
  3. CHECK CMP SENSOR (PHASE) POWER SUPPLY CIRCUIT 
    1. Disconnect CMP sensor (PHASE) harness connector (bank 2) or harness connectors F58, F211 (bank 1).
      Fig 1: Identifying Check CMP Sensor (PHASE) Power Supply Circuit
      G00786794Courtesy of NISSAN MOTOR CO., U.S.A.
    2. Check voltage between CMP sensor (PHASE) harness connector (bank 2) terminal 3 or harness connector F70 (bank 1) terminal 4 and ground with CONSULT-II or tester.
      Fig 2: Checking Voltage Between CMP Sensor (PHASE) Harness Connector (Bank 2) And Ground
      G00786795Courtesy of NISSAN MOTOR CO., U.S.A.
    3. Also check harness for short to ground and short to power.

      OK or NG 

    1. OK: GO TO  5 .
    2. NG: GO TO 4.
  4. DETECT MALFUNCTIONING PART 

    Check the following.

    • Harness connectors F58, F211 (bank 1)
    • Harness connectors E15, F18
    • Harness for open or short between ECM and camshaft position sensor (PHASE) or harness connector F70
    • Harness for open or short between ECM relay and camshaft position sensor (PHASE) or harness connector F70
    1. : Repair open circuit or short to ground or short to power in harness or connectors.
  5. CHECK CMP SENSOR (PHASE) GROUND CIRCUIT FOR OPEN AND SHORT 
    1. Check harness continuity between harness connector F58 terminal 3 and engine ground (bank 1). Refer to Wiring Diagram.
    2. Check CMP sensor (PHASE) harness connector terminal 1 and engine ground (bank 2). Refer to Wiring Diagram.

      Continuity should exist. 

    3. Also check harness for short to power.

      OK or NG 

    1. OK: GO TO  7 .
    2. NG: GO TO 6.
  6. DETECT MALFUNCTIONING PART 

    Check the following.

    • Harness connectors F58, F211 (bank 1)
    • Harness for open between camshaft position sensor (PHASE) or harness connector F70 and ground
    1. : Repair open circuit or short to ground or short to power in harness or connectors.
  7. CHECK CMP SENSOR (PHASE) INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 
    1. Disconnect ECM harness connector.
    2. Check harness continuity between ECM terminal 65 and harness connector F58 terminal 1.
    3. Check harness continuity between ECM terminal 85 and CMP sensor (PHASE) harness connector terminal 2.

      Refer to Wiring Diagram.

      Continuity should exist. 

    4. Also check harness for short to ground and short to power.

      OK or NG 

    1. OK (DTC P0340): GO TO  9 .
    2. OK (DTC P0345): GO TO  10 .
    3. NG: GO TO 8.
  8. DETECT MALFUNCTIONING PART 

    Check the following.

    • Harness connectors F58, F211 (bank 1)
    • Harness for open or short between ECM and camshaft position sensor (PHASE) or harness connector F58
    1. : Repair open circuit or short to ground or short to power in harness or connectors.
  9. CHECK CMP SENSOR (PHASE) SUB-HARNESS CIRCUIT FOR OPEN AND SHORT 
    1. Disconnect CMP sensor (PHASE) harness connector.
    2. Check harness continuity between CMP sensor (PHASE) terminals and harness connector F231 terminals as follows.
      Fig 3: Checking CMP Sensor (Phase) Sub-Harness Circuit For Open And Short
      G00786796Courtesy of NISSAN MOTOR CO., U.S.A.
    3. Also check harness for short to ground and short to power.

      OK or NG 

    1. OK: GO TO 10.
    2. NG: Repair open circuit or short to ground or short to power in harness or connectors.
  10. CHECK CAMSHAFT POSITION SENSOR (PHASE) 

    Refer to COMPONENT INSPECTION  .

    OK or NG 

    1. OK: GO TO 11.
    2. NG: Replace camshaft position sensor (PHASE).
  11. CHECK CAMSHAFT (INTAKE) 

    Visually check for chipped signal plate at camshaft rear.

    Fig 4: Checking For Chipped Signal Plate At Camshaft Rear
    G00786797Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK: GO TO 12.
    2. NG: Replace camshaft.
  12. CHECK INTERMITTENT INCIDENT 

    Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT  .

    1. : INSPECTION END 
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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