Monitor Scan Tool Data
- Ignition "ON" & Engine "OFF".
- Disconnect IATS connector.
- Connect Scan tool and monitor the "INT.AIR TEMP. SNSR (V)" parameter on the Scan tool 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 below.
- Jumper the terminal 5 of the IATS harness connector to chassis ground.
- Read "INT.AIR TEMP. SNSR (V)" parameter on the Scan tool.
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.