Monitor Scantool Data

Ignition "ON" & Engine "OFF"
Disconnect IATS connector
Connect Scantool and monitor the "IAT SENSOR" parameter on the Scantool data list.
Jumper the terminals 1 and 5 of the sensor harness connector together.
1. Specification: Approx. 0V
  
  Fig 1: Monitoring IAT Sensor Parameter On Scantool Data List (Signal Circuit Open)
  
  Fig 2: Monitoring IAT Sensor Parameter On Scantool Data List (Signal Circuit Short To Ground)
Is IAT data within the specification?
YES
1. Possibility of sensor malfunction. Go to "COMPONENT INSPECTION " procedure.
NO
1. Go to next step as below.
Jumper the terminal 5 of the IATS harness connector to chassis ground.
Read "IAT SENSOR" parameter on the Scantool.
1. Specification: Approx. 0V
Is IAT data within the specification?
YES
1. Possibility of open in IAT ground circuit Go to "GROUND CIRCUIT INSPECTION " procedure.
NO
1. Possibility of open or short to battery in IAT signal circuit. Go to "SIGNAL CIRCUIT INSPECTION " procedure.