Air Temperature Sensor ( Ambient / Intake ): Testing and Inspection

1985 Renault 18I/Sportwagon L4-2165cc 2.2LSECTION Testing and Inspection

1. Disconnect wire harness connector from MAT sensor.
2. Using a suitable high input impedance digital volt-ohmmeter, measure sensor resistance.
3. Resistance should be between 300 ohms and 300k ohms (10k ohms at room temperature).
4. If resistance of MAT sensor is not within specifications, replace.
5. Using ohmmeter, measure resistance between ECU connector terminal J2-11 and the sensor connector terminal, then between ECU connector terminal J2-13 and sensor connector terminal.
6. If resistance is greater than one ohm, repair wire harness as necessary.



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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.