INTAKE AIR TEMPERATURE (IAT) SENSOR INSPECTION [L8, LF, L3]
INTAKE AIR TEMPERATURE (IAT) SENSOR INSPECTION [L8, LF, L3]
id0140a5802200
Resistance Inspection
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Note
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• Perform the following inspection only when directed.
1. Disconnect MAF/IAT sensor.
2. Measure the resistance between the MAF/IAT sensor terminals D and E using an ohmmeter.
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• If not as specified, replace the MAF/IAT sensor.
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• If the MAF/IAT sensor is okay, but the IAT PID are out of specification, perform the "Circuit Open/Short Inspection".
Specification
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Ambient temperature (°C {°F})
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Resistance (kilohm)
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-20 {-4}
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13.6-18.4
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20 {68}
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2.21-2.69
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60 {140}
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0.493-0.667
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Circuit Open/Short Inspection
1. Disconnect the PCM connector. (See PCM REMOVAL/INSTALLATION [L8, LF, L3].)
2. Inspect the following wiring harnesses for open or short. (Continuity check)
Open circuit
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• If there is no continuity, the circuit is open. Repair or replace the harness.
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- MAF/IAT sensor terminal D and PCM terminal 1AT
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- MAF/IAT sensor terminal E and PCM terminal 1AR
Short circuit
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• If there is continuity, the circuit is shorted. Repair or replace the harness.
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- MAF/IAT sensor terminal E and power supply
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- MAF/IAT sensor terminal D and power supply
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- MAF/IAT sensor terminal D and body GND
