INTAKE AIR TEMPERATURE (IAT) SENSOR INSPECTION[L3 Turbo]

id0140b6802200


Resistance Inspection

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

1.  Disconnect the MAF/IAT sensor.

2.  Measure the resistance between the MAF/IAT sensor terminals D and E using a tester.

acxuuw00000096

•  If not as specified, replace the MAF/IAT sensor. (See INTAKE AIR SYSTEM REMOVAL/INSTALLATION[L3 Turbo].)
•  If the MAF/IAT sensor is normal, but the PID is out of specification, perform the “Circuit Open/Short Inspection”.

Specification

Ambient temperature (°C {°F})

Resistance (kilohm)
20 {68}
2.21—2.69
60 {140}
0.493—0.667


Circuit Open/Short Inspection

acxuuw00000097
acxuuw00000098

1.  Disconnect the PCM connector. (See PCM REMOVAL/INSTALLATION[L3 Turbo].)

2.  Inspect the following wiring harnesses for an open or short circuit. (Continuity check)


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 1M
―  MAF/IAT sensor terminal E and PCM terminal 1AR


Short circuit

•  If there is continuity, there is a short circuit. Repair or replace the wiring harness.
―  MAF/IAT sensor terminal E and power supply
―  MAF/IAT sensor terminal D and power supply
―  MAF/IAT sensor terminal D and body ground