Monitor SCANTOOL Data
- Ignition "ON" & Engine "OFF".
- Disconnect IATS connector.
- Connect Scantool and monitor the "INT.AIR TEMP. SNSR(V)" parameter on the Scantool data list.
- Jumper the terminals 1 and 5 of the sensor harness connector together.
Specification : Approx. 0V
- Is IAT data near the specified value?
YES
- Possibility of sensor malfunction. Go to COMPONENT INSPECTION procedure.
NO
- Go to next step as below.
- Jumper the terminal 5 of the IATS harness connector to chassis ground.
- Read "INT.AIR TEMP. SNSR(V)" parameter on the Scantool.
Specification : Approx. 0V
- Is displayed IAT data near the specified value?
YES
- Possibility of open in IATS ground circuit. Go to GROUND CIRCUIT INSPECTION procedure.
NO
- Possibility of open or short to battery in IAT signal circuit. Go to SIGNAL CIRCUIT INSPECTION procedure.