2004 Infiniti I35FACTORY OEM SERVICE PROCEDURE

Diagnostic Procedure

  1. INSPECTION START 

    Do you have CONSULT-II?

    Yes or No 

    1. Yes: GO TO 2.
    2. No: GO TO  3 .
  2. CHECK OVERALL FUNCTION 

    With CONSULT-II 

    1. Turn ignition switch ON.
    2. Check START SIGNAL in DATA MONITOR mode with CONSULT-II under the following conditions.
      Fig 1: Displaying CONSULT-II DATA MONITOR Screen And Conditions
      G00787507Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK: INSPECTION END
    2. NG: GO TO  4 .
  3. CHECK OVERALL FUNCTION 

    Without CONSULT-II 

    Check voltage between ECM terminal 42 and ground under the following conditions.

    Fig 2: Checking Voltage Between ECM Terminal And Ground
    G00787508Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK: INSPECTION END
    2. NG: GO TO 4.
  4. CHECK STARTING SYSTEM 

    Turn ignition switch OFF, then turn it to START.

    Does starter motor operate? 

    Yes or No 

    1. Yes: GO TO 5.
    2. No: Refer to 2003-2004 .
  5. CHECK FUSE 
    1. Turn ignition switch OFF.
    2. Disconnect 10A fuse.
    3. Check if 10A fuse is OK.

    OK or NG 

    1. OK: GO TO 6.
    2. NG: Replace 10A fuse.
  6. CHECK START SIGNAL INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 
    1. Disconnect ECM harness connector.
    2. Disconnect ignition switch harness connector.
    3. Check harness continuity between ECM terminal 42 and ignition switch terminal 6.

      Refer to Wiring Diagram.

      Continuity should exist. 

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

    OK or NG 

    1. OK: GO TO  8 .
    2. NG: GO TO 7.
  7. DETECT MALFUNCTIONING PART 

    Check the following.

    • Harness connectors F66, M229
    • Fuse block (J/B) connectors M17, E83
    • Harness for open or short between ignition switch and ECM
    1. : Repair open circuit or short to ground or short to power in harness or connectors.
  8. 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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