INTAKE AIR TEMPERATURE (IAT) SENSOR INSPECTION [MZR-CD (RF Turbo)]

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Resistance Inspection

1.  Disconnect the MAF/IAT sensor connector.

2.  Measure the resistance between MAF/IAT sensor terminals D and E using an ohmmeter.

•  If not as specified, replace the MAF/IAT sensor. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZR-CD (RF Turbo)].)
•  If MAF/IAT sensor is okay, perform the “Circuit Open/Short Inspection”.

Specification

Ambient temperature

(°C {°F})

Resistance (kilohm)
20 {68}
2.21—2.69


Circuit Open/Short Inspection

1.  Disconnect the PCM connector. (See PCM REMOVAL/INSTALLATION [MZR-CD (RF Turbo)].)

2.  Inspect for open/short circuit in the following wiring harnesses.

•  If there is open/short circuit, repair or replace wiring harnesses.

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Open circuit

•  MAF/IAT sensor terminal D and PCM terminal 55
•  MAF/IAT sensor terminal E and PCM terminal 78


Short circuit

•  MAF/IAT sensor terminal D and power supply
•  MAF/IAT sensor terminal D and body ground
•  MAF/IAT sensor terminal E and power supply