Monitor SCANTOOL Data
- Ignition "ON" & Engine "OFF".
- Disconnect IATS sensor connector.
- Connect Scantool and monitor the "INT. AIR TEMP. SNSR(V)" parameter on the Scantool 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 Scantool.
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.