INTAKE AIR TEMPERATURE (IAT) SENSOR INSPECTION[ZJ, ZY, Z6]

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Note

• Before performing the following inspection, make sure to follow the procedure as indicated in the troubleshooting flowchart. (See HOW TO USE THIS MANUAL.)

Resistance Inspection

1. Disconnect the MAF/IAT sensor connector.

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

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• If not within the specification, replace the MAF/IAT sensor. (See MASS AIR FLOW (MAF)/INTAKE AIR TEMPERATURE (IAT) SENSOR REMOVAL/INSTALLATION[ZJ, ZY, Z6].)

• 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

Ambient temperature (°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)

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Circuit Open/Short Inspection (Without Throttle Valve Actuator)

1. Remove the PCM connector cover.

2. Disconnect the PCM connector. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION[ZJ, ZY, Z6].)

3. Inspect the following wiring harness for open or short circuit (continuity check).

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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 2AQ

― MAF/IAT sensor terminal E and PCM terminal 2AY

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 ground

― MAF/IAT sensor terminal E and power supply

Circuit Open/Short Inspection (With Throttle Valve Actuator)