Signal Circuit Inspection

Check Open Or Short In Signal Circuit
1. IG KEY "OFF".
2. Disconnect IATS connector.
3. IG KEY "ON" & ENG "OFF".
4. Measure voltage between signal terminal of IATS harness connector and chassis ground.
  Specification: Approx. 5V
  
  Fig 1: Measuring Voltage Between Signal Terminal Of IATS Harness Connector And Chassis Ground
  Courtesy of KIA MOTORS AMERICA, INC.
  
  Fig 2: Identifying MAPS Connector Terminals
  Courtesy of KIA MOTORS AMERICA, INC.
5. Is the measured voltage within specification?
  YES
  
  Go to "CHECK SHORT TO GROUND IN HARNESS " procedure below.
  
  NO
  
  Check for Open or Short in signal circuit. Repair as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.
Check Short to ground in signal circuit
1. IG KEY "OFF".
2. Disconnect IATS and ECM connector.
3. Measure resistance between signal and ground terminal of IATS harness connector.
  Specification: Infinite
  
  Fig 3: Measuring Resistance Between Signal And Ground Terminal Of IATS Harness Connector
  Courtesy of KIA MOTORS AMERICA, INC.
  
  Fig 4: Identifying MAPS Connector Terminals
  Courtesy of KIA MOTORS AMERICA, INC.
4. Is the measured resistance within specification?
  YES
  
  Go to "GROUND CIRCUIT INSPECTION " procedure.
  
  NO
  
  Check for short to ground in signal circuit. Repair as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.