Signal Circuit Inspection
- Check voltage
- IG "OFF". Disconnect IATS connector.
- IG "ON".
- Measure voltage between signal terminal of IATS harness connector and chassis ground.
Specification : Approx. 3.3V
- Is the measured voltage within specification?
YES
- Go to "COMPONENT INSPECTION " procedure.
NO
- Go to " 2 Check short to ground in harness" procedure.
- Check short to ground in harness
- IG "OFF". Disconnect IATS connector and PCM connector.
- Measure resistance between signal terminal of IATS harness connector and chassis ground. (Measurement "A")
- Measure resistance between signal and ground terminals of IATS harness connector. (Measurement "B")
- Measure resistance between signal terminal of IATS harness connector and ground terminal of Baro Sensor harness connector. (Measurement "B")
Specification : Infinite
- 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.