2004 Infiniti I35FACTORY OEM SERVICE PROCEDURE

Diagnostic Procedure

  1. RETIGHTEN GROUND SCREWS 
    1. Turn ignition switch OFF.
    2. Loosen and retighten engine ground screws. See Figure .
    1. : GO TO 2.
  2. CHECK THROTTLE POSITION SENSOR POWER SUPPLY CIRCUIT 
    1. Disconnect electric throttle control actuator harness connector. See Figure .
    2. Turn ignition switch ON.
    3. Check voltage between electric throttle control actuator terminal 1 and ground with CONSULT-II or tester.
    Fig 1: Checking Voltage Between Electric Throttle Control Actuator Terminal 1 And Ground
    G00787198Courtesy of NISSAN MOTOR CO., U.S.A.

    Voltage: Approximately 5V 

    OK or NG 

    1. OK: GO TO  5 .
    2. NG: GO TO 3.
  3. CHECK SENSOR POWER SUPPLY CIRCUITS 

    Check the following.

    • Harness for short to power and short to ground, between the following terminals.

      ECM terminal 111 and electric throttle control actuator terminal 1. Refer to WIRING DIAGRAM  .

      ECM terminal 111 and APP sensor terminal 6. Refer to WIRING DIAGRAM  .

      ECM terminal 111 and MAF sensor terminal 2. Refer to WIRING DIAGRAM  .

      ECM terminal 111 and EVAP control system pressure sensor terminal 1. Refer to WIRING DIAGRAM  .

      ECM terminal 111 and power steering pressure sensor terminal 1. Refer to WIRING DIAGRAM  .

      ECM terminal 111 and refrigerant pressure sensor terminal 1. Refer to WIRING DIAGRAM  .

    • ECM pin terminal

    OK or NG 

    1. OK: GO TO 4.
    2. NG: Repair short to ground or short to power in harness or connectors.
  4. CHECK COMPONENTS 

    Check the following.

    OK or NG 

    1. OK: GO TO  7 .
    2. NG: Replace malfunctioning component.
  5. CHECK THROTTLE POSITION SENSOR 

    Refer to COMPONENT INSPECTION  .

    OK or NG 

    1. OK: GO TO  7 .
    2. NG: GO TO 6.
  6. REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR 
    1. Replace electric throttle control actuator.
    2. Perform THROTTLE VALVE CLOSED POSITION LEARNING  .
    3. Perform IDLE AIR VOLUME LEARNING  .
    1. : INSPECTION END
  7. CHECK INTERMITTENT INCIDENT 

    Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT  .

    1. : INSPECTION END
Factory Service Tools

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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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