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

INTAKE AIR TEMPERATURE (IAT) SENSOR INSPECTION

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 check)

Open circuit
- If there is no continuity, there is an open circuit. Repair or replace the wiring harness.
- MAF/IAT sensor terminal D (harness-side) and PCM terminal 15*1, 2E*2
- MAF/IAT sensor terminal E (harness-side) and PCM terminal 20*1, 2H*2

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

*1 California emission regulation applicable ATX model
*2 Except for California emission regulation applicable ATX model