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

INTAKE AIR TEMPERATURE (IAT) SENSOR INSPECTION [MZI-3.7]

NOTE:
- Before performing the following inspection, make sure to follow the procedure as indicated in the troubleshooting flowchart. Description and Operation

Resistance Inspection

1. Disconnect the MAF/IAT sensor connector.

2. Measure the resistance between MAF/IAT sensor terminals A and F.






- If not within the specification, replace the MAF/IAT sensor. Service and Repair
- If the monitor item status/specification (reference) is not within the specification, even though the resistance is within the specification, perform the "Circuit Open/Short Inspection".
IAT sensor resistance





IAT sensor characteristics graph (reference)






Circuit Open/Short Inspection





1. Disconnect the PCM connector. Service and Repair

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

Open circuit

- If there is no continuity, the circuit is open. Repair or replace the wiring harness.

- MAF/IAT sensor terminal B and body ground
- MAF/IAT sensor terminal F and PCM terminal 1AF

Short circuit

- If there is continuity, the circuit is shorted. Repair or replace the wiring harness.

- MAF/IAT sensor terminal B and power supply
- MAF/IAT sensor terminal F and body ground
- MAF/IAT sensor terminal F and power supply