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

id0140b6802200

## Resistance Inspection

  Note

  • Perform the following inspection only when directed.

1. Disconnect the MAF/IAT sensor.

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

  • 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 {-4} | 13.6-18.4
20 {68} | 2.21-2.69
60 {140} | 0.493-0.667

## Circuit Open/Short Inspection

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 2V
  - MAF/IAT sensor terminal E and PCM terminal 2H

### 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