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Control Circuit Inspection

Check for open in control harness.
1. Ignition "OFF".
2. Disconnect PCM connector.
3. Measure resistance between terminals 6 of the HO2S heater harness connector and 8 of the PCM harness connector.
  Specification: Approx 0Ω
  
  Fig 1: Measuring Resistance Between Terminals 6 Of HO2S Heater Connector And 8 Of PCM Connector
  Courtesy of HYUNDAI MOTOR CO.
4. Is resistance within the specification?
  Yes:
  - Go to next step as below
  No:
  - Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
Check for short to ground in control circuit.
1. Measure resistance between terminal 6 of the HO2S heater harness connector and chassis ground.
  Specification: infinite
  
  Fig 2: Measuring Resistance Between Terminal 6 Of HO2S Heater Connector And Chassis Ground
  Courtesy of HYUNDAI MOTOR CO.
2. Is resistance within the specification?
  Yes:
  - Go to next step as below.
  No:
  - Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
Check for short to power in control circuit.

Reconnect the PCM connector.
Ignition "ON" & Engine "OFF".
Measure voltage between terminal 6 of the HO2S heater harness connector and chassis ground.
Specification: Approx 0V

Fig 3: Measuring Voltage Between Terminal 6 Of HO2S Heater Connector And Chassis Ground
Courtesy of HYUNDAI MOTOR CO.
Is voltage within the specification?
Yes:
- Go to "COMPONENT INSPECTION " procedure.
No:
- Repair open or short to ground in control circuit and go to "VERIFICATION OF VEHICLE REPAIR " procedure