2004 Infiniti I35FACTORY OEM SERVICE PROCEDURE

Fail-Safe Mode

When the malfunction is detected, the ECM enters fail-safe mode and the MIL lights up.

Fig 1: Identifying Engine Operation Condition In Fail-Safe Mode
G00787039Courtesy of NISSAN MOTOR CO., U.S.A.

Engine operating condition in fail-safe mode

ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return spring.

Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

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When to See a Mechanic

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

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