Component Inspection

1. Ignition "OFF".
2. Disconnect IATS connector.
3. Measure resistance between terminal 5 and 3 of IAT connector (Component side).
   1. Specification:
   TEMPERATURE RESISTANCE AND VOLTAGE SPECIFICATION CHART
   
   

   Temperature	Resistance	Voltage
   20°C (68°F)	2.33~2.97 kΩ	2.5~2.7V
   80°C (176°F)	0.31~0.43 kΩ	0.6~0.8V

   Fig 1: Measuring Resistance Between Terminal 5 And 3 Of IAT Connector

   
4. Is the measured resistance within specifications?

   YES

   • Go to  2 "Check PCM" as below.

   NO

   • Substitute with a known - good IATS and check for proper operation.

If the problem is corrected, replace IATS and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

1. Ignition "OFF" & Engine "OFF".
2. Connect scantool and Ignition "ON".
3. Select simulation function on scantool.
4. Simulate voltage at terminal 5 of IAT sensor signal connector.
   Fig 2: Scantool Display - IAT Sensor Terminal Simulate Voltage

   
5. Does the signal value of IAT sensor changes according to simulation voltage?

   YES

   • Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

   NO

   • Substitute with a known - good PCM and check for proper operation.

If the problem is corrected, replace PCM and go to "VERIFICATION OF VEHICLE REPAIR " procedure.