Signal Circuit Inspection

Check open in harness.
1. IG "OFF".
2. Disconnect IATS connector.
3. IG "ON" & ENG "OFF"
4. Measure voltage between terminal 3 of IATS harness connector and chassis ground.
  Specification: Approx. 5V
  
  Fig 1: Measuring Voltage Between Terminal 3 Of IATS Harness Connector And Chassis Ground
  Courtesy of HYUNDAI MOTOR CO.
5. Is the measured voltage within specification?
  YES
  - Go to " 2 Check short to ground in harness" as follows.
  NO
  - Repair or replace as necessary and then, go to "VERIFICATION OF VEHICLE REPAIR " procedure.
Check short to ground in harness.
1. IG "OFF".
2. Disconnect IATS and ECM/PCM connector.
3. Measure resistance between terminal 3 and 4 of IATS harness connector.
  Specification: Infinite
  
  Fig 2: Measuring Resistance Between Terminal 3 And 4 Of IATS Harness Connector
  Courtesy of HYUNDAI MOTOR CO.
4. Is the measured resistance within specification?
  YES
  - Go to "GROUND CIRCUIT INSPECTION " procedure.
  NO
  - Repair or replace as necessary and then, go to "VERIFICATION OF VEHICLE REPAIR " procedure.