INTAKE AIR TEMPERATURE (IAT) SENSOR INSPECTION [LF]

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

B3E014018845W01

  Note

  • Before performing the following inspection, make sure to follow the procedure as indicated in the troubleshooting flowchart.

## Resistance Inspection

1. Disconnect the mass air flow sensor connector.

2. Verify that the resistance between MAF sensor terminals D and E is within the specification.

  • If the monitor item status/specification (reference) is not within the specification, even though the IAT sensor resistance is within the specification, perform the "Circuit Open/Short Inspection".
  • If not within the specification, replace the MAF sensor.

  Standard

  Ambient temperature (°C {°F}) | Resistance (kilohm)
  --- | ---
  -20 {-4.0} | 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 [LF].)

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 and PCM terminal 1AH
  - MAF/IAT sensor terminal E and PCM terminal 1AA

### Short circuit

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