Signal Circuit Inspection

Check voltage
1. IG "OFF" and disconnect Cruise switch connector.
2. IG "ON".
3. Measure voltage between signal terminal of Cruise switch harness connector and chassis ground.
  Specification: Approx. 4.5V
  
  Fig 1: Measuring Voltage Between Signal Terminal Of Cruise Switch Harness Connector And Chassis Ground
  Courtesy of HYUNDAI MOTOR CO.
4. Is the measured voltage within specification?
  YES
  - Go to "COMPONENT INSPECTION " procedure.
  NO
  - Go to "Check Short In Harness " as follows.
Check Short In Harness
1. IG "OFF" and disconnect Cruise switch connector and ECM connector.
2. Measure resistance between signal and power terminals of Cruise switch harness connector.
3. Measure resistance between signal and ground terminals of Cruise switch harness connector.
  Specification: Infinite
  
  Fig 2: Measuring Resistance Between Signal And Power And Ground Terminals Of Cruise Switch Harness Connector
  Courtesy of HYUNDAI MOTOR CO.
4. Is the measured resistance within specification?
  YES
  - Go to "Check Open In Harness " as follows.
  NO
  - Repair short in control harness and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
Check Open In Harness
1. IG "OFF" and disconnect Cruise switch connector and ECM connector.
2. Measure resistance between signal terminal of Cruise switch harness connector and cruise signal terminal of ECM harness connector.
  Specification: Approx. below 1Ω
  
  Fig 3: Measuring Resistance Between Signal Terminal Of Cruise Switch And Cruise Signal Terminal Of ECM Harness Connector
  Courtesy of HYUNDAI MOTOR CO.
3. Is the measured resistance within specification?
  YES
  - Go to "COMPONENT INSPECTION " procedure.
  NO
  - Repair open in harness, and go to "VERIFICATION OF VEHICLE REPAIR " procedure.