INTAKE AIR TEMPERATURE (IAT) SENSOR INSPECTION [ZY]

Note

• Before performing the following inspection, make sure to follow the procedure as indicated in the troubleshooting flowchart. (See Troubleshooting Procedure.)

Resistance Inspection

1. Disconnect the MAF/IAT sensor connector.

2. Verify that the resistance between terminals D and E is within the specification.

• If not within the specification, replace the MAF/IAT sensor. (See MASS AIR FLOW (MAF)/INTAKE AIR TEMPERATURE (IAT) SENSOR REMOVAL/INSTALLATION [ZY].)

• If the monitor item condition/specification (reference) is not within the specification, even though there is no malfunction, perform the "Circuit Open/Short Inspection".

IAT sensor resistance

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

IAT sensor characteristics graph (reference)

Circuit Open/Short Inspection

1. Remove the PCM connector cover.

2. Disconnect the PCM connector. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [ZY].)

3. Inspect the following wiring harness 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 2R

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

Short circuit

• If there is continuity, there is a short circuit. Repair or replace the wiring harness.

- MAF/IAT sensor terminal D and power supply

- MAF/IAT sensor terminal D and body GND

- MAF/IAT sensor terminal E and power supply