Friday, February 24, 2012

Procedure to test Intake Air Temperature (IAT) Sensor?

The details are provided below to test
Intake Air Temperature (IAT) Sensor


Check the following items before beginning more in depth diagnosis and testing.

Check for poor connection at the PCM. Inspect harness connectors for backed out terminals, improper mating, broken locks, improperly formed or damaged terminals and poor terminal-to-wire connections.
Look for a damaged harness or damaged wiring going to the IAT sensor, especially if heavy work has recently been done where the connector could have been damaged.

Click image to see an enlarged view
Fig. IAT sensor resistance value chart
  1. Turn the ignition switch OFF .
  2. Disconnect the wiring harness from the IAT sensor.
  3. Measure the resistance between the sensor terminals.
  4. Compare the resistance reading with the accompanying chart.
  5. If the resistance is not within specification, the IAT may be faulty.
  6. Connect the wiring harness to the sensor.

This will help.

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