Control Circuit Inspection

Check for open in signal harness.
1. Ignition "OFF".
2. Measure resistance from each ignition coil control circuit to ECM.
  Specification: Approx. 0Ω
  
  Fig 1: Measuring Resistance From Each Ignition Coil Control Circuit To ECM
  Courtesy of HYUNDAI MOTOR CO.
3. Is resistance within the specification?
  YES:
  - Go to step 2.
  NO:
  - Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
Check for short to ground in signal harness.
1. Measure resistance from each ignition coil control circuit to chassis ground
  Specification: Infinite
  
  Fig 2: Measuring Resistance From Each Ignition Coil Control Circuit To Chassis Ground
  Courtesy of HYUNDAI MOTOR CO.
2. Is resistance within the specification?
  YES:
  - Go to step 3.
  NO:
  - Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
Check for short to battery in signal harness.
1. Disconnect ECM connector.
2. Ignition "ON" & Engine "OFF".
3. Measure voltage from each ignition coil control circuit to chassis ground
  Specification: Approx. 0V
  
  Fig 3: Measuring Voltage From Ignition Coil Control Circuit To Chassis Ground
  Courtesy of HYUNDAI MOTOR CO.
4. Is voltage within the specification?
  YES:
  - Go to "COMPONENT INSPECTION " procedure.
  NO:
  - Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.