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 step 6.
- 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.