INTAKE AIR TEMPERATURE (IAT) SENSOR INSPECTION [LF, 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 okay, but the IAT PID are out of specification, perform the "Circuit Open/Short Inspection".

Specification

Ambient temperature (°C {°F})	Resistance (kilohm)
-20 {-4}	13.6-18.4
20 {68}	2.21-2.69
60 {140}	0.493-0.667

Circuit Open/Short Inspection

1. Disconnect the PCM connector. (See PCM REMOVAL/INSTALLATION [LF, L3].)

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

Open circuit

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

- MAF/IAT sensor terminal D (harness-side) and PCM terminal 2E (harness-side)

- MAF/IAT sensor terminal E (harness-side) and PCM terminal 2H (harness-side)

Short circuit

• If there is continuity, the circuit is shorted. Repair or replace the 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