Monitor Scan Tool Data
- Ignition "ON" & Engine "OFF".
- Disconnect IATS sensor connector.
- Connect Scan Tool and monitor the "INT. AIR TEMP. SNSR (V)" parameter on the Scan Tool data list.
- Jumper the terminals 1 and 2 of the IAT sensor harness connector together.
Specification: Approx. 0V
- Is IAT data within the specification?
YES:
- Possibility of sensor malfunction. Go to "COMPONENT INSPECTION " procedure.
NO:
- Go to next step as below.
- Jumper the terminal 1 of the IAT sensor harness connector to chassis ground.
- Observe the "IAT SENSOR" parameter on the Scan Tool.
Specification: Approx. 0V
- Is IAT data within the specification?
YES:
- Possibility of open in IAT 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.