INTAKE AIR TEMPERATURE (IAT) SENSOR INSPECTION [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 [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

1.  Remove the PCM connector cover.

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

―  MAF/IAT sensor terminal E and power supply