INTAKE AIR TEMPERATURE (IAT) SENSOR INSPECTION [L3 Turbo]

Resistance Inspection

Note

• Perform the following inspection only when directed.

1. Disconnect the MAF/IAT sensor.

2. Measure the resistance between the MAF/IAT sensor terminals D and E using a tester.

• If not as specified, replace the MAF/IAT sensor. (See INTAKE AIR SYSTEM REMOVAL/INSTALLATION [L3 Turbo].)

• If the MAF/IAT sensor is normal, but the PID is 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 [L3 Turbo].)

2. Inspect the following wiring harnesses for an 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 and PCM terminal 2V

- MAF/IAT sensor terminal E and PCM terminal 2H

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 ground