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

BME014018840201

## Resistance Inspection

  Note

  • 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.

  • If not as specified, replace the MAF/IAT sensor.
  • If the MAF/IAT sensor is normal, but the IAT PID are 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].)

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

### Open circuit

  • If there is no continuity, the circuit is open. Repair or replace the harness.
  - MAF/IAT sensor terminal D (harness-side) and PCM terminal 2E (harness-side)
  - MAF/IAT sensor terminal E (harness-side) and PCM terminal 2H (harness-side)

### Short circuit

  • If there is continuity, the circuit is shorted. Repair or replace the harness.
  - MAF/IAT sensor terminal E (harness-side) and power supply
  - MAF/IAT sensor terminal D (harness-side) and power supply
  - MAF/IAT sensor terminal D (harness-side) and body GND