INTAKE AIR TEMPERATURE (IAT) SENSOR INSPECTION [F2]

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Note
•  Perform the following test only when directed.

1.  Remove the IAT sensor.

2.  Heat the IAT sensor using the lamp.

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3.  Measure the resistance of the IAT sensor.

Specification

Water temperature

(°C {°F})

Resistance (kilohm)
20 {68}
28—38
80 {176}
3.1—3.9

•  If not as specified, replace the IAT sensor.
•  If there is no malfunction, but PID valve is out of specification, inspect as follows and repair or replace as necessary.
Open circuit
―  IAT signal circuit (IAT sensor connector terminal A and PCM connector terminal 2L)
―  GND circuit (IAT sensor connector terminal B and PCM connector terminal 2D)
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Short circuit
―  IAT signal circuit (IAT sensor connector terminal A and PCM connector terminal 2L to GND)

4.  Reconnect the IAT sensor connector.