Signal Circuit Inspection

■ Check voltage 

1. IG "OFF". Disconnect IATS connector.
2. IG "ON".
3. Measure voltage between signal terminal of IATS harness connector and chassis ground.

   Specification:  Approx. 3.3V

4. Is the measured voltage within specification?

   YES 

   • Go to "COMPONENT INSPECTION " procedure.

   NO 

   • Go to "Check short to ground in harness" procedure.

■ Check short to ground in harness 

1. IG "OFF". Disconnect IATS connector and PCM connector.
2. Measure resistance between signal terminal of IATS harness connector and chassis ground. (Measurement "A")
3. Measure resistance between signal and ground terminals of IATS harness connector. (Measurement "B")
4. Measure resistance between signal terminal of IATS harness connector and ground terminal of Baro Sensor harness connector. (Measurement "B")

   Specification:  Infinite

5. Is the measured resistance within specification?

   YES 

   • Go to "COMPONENT INSPECTION " procedure.

   NO 

   • Repair short to ground in harness. Go to "VERIFICATION OF VEHICLE REPAIR " procedure.