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

INTAKE AIR TEMPERATURE (IAT) SENSOR INSPECTION [L3]

Resistance Inspection

NOTE: Perform the following inspection only when directed.

1. Disconnect MAF/IAT sensor.
2. Measure the resistance between the MAF/IAT sensor terminals D and E using an ohmmeter.




- If not as specified, replace the MAF/IAT sensor.
- If the MAF/IAT sensor is normal, but PID are out of specification, perform the "Circuit Open/ Short Inspection".

Circuit Open/Short Inspection

1. Disconnect the PCM connector.




2. Inspect the following wiring harnesses for open or short circuit. (Continuity inspection)

Open circuit
- If there is no continuity, there is an open circuit. Repair or replace the wiring harness.
- MAF/IAT sensor terminal D and PCM terminal 1AT
- MAF/IAT sensor terminal E and PCM terminal 1AR

Short circuit
- If there is continuity, there is a short circuit. Repair or replace the wiring harness.
- MAF/IAT sensor terminal E and power supply
- MAF/IAT sensor terminal D and power supply
- MAF/IAT sensor terminal D and body GND