2004 Infiniti FX45FACTORY OEM SERVICE PROCEDURE

Intake Air Temperature Sensor

  1. Check resistance between intake air temperature sensor terminals 5 and 6. Intake air temperature 77Β° F (25Β° C) Specified resistance is 1.9-2.1 Kohm.
  2. If NG, replace mass air flow sensor (with intake air temperature sensor).

    For mass air flow sensor & intake air temperature sensor location, see Figure and Figure .

    For thermistor specifications in graph format, see Figure .

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.

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