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HOMESERVICE MANUALSHYUNDAI2005SANTA FE GLS, 2.7 D, AWDREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROL SYSTEM DIAGNOSIS (2.7L) (1 OF 2)DTC TROUBLESHOOTING PROCEDURESDTC P0036: HO2S HEATER CONTROL CIRCUIT (BANK 1/SENSOR 2)CONTROL CIRCUIT INSPECTION
2005 Hyundai Santa Fe GLS, 2.7 D, AWD

Control Circuit Inspection

2005 Hyundai Santa Fe GLS, 2.7 D, AWDSECTION Control Circuit Inspection
  1. Check for open in control harness
    1. Ignition "OFF".
    2. Measure resistance between terminals 4 of the HO2S heater harness connector and 7 of the ECM harness connector.

      Specification: Approx. 0Ω

      Fig 1: Measuring Resistance Between Terminals 4 Of HO2S Heater Harness Connector And 7 Of ECM Harness Connector
      G03846058Courtesy of HYUNDAI MOTOR CO.
    3. Is resistance within the specification?

      YES 

      • Go to next step.

      NO 

  2. Check for short to ground in control circuit.
    1. Measure resistance between terminal 4 of the HO2S heater harness connector and chassis ground.

      Specification: infinite

      Fig 2: Measuring Resistance Between Terminal 4 Of HO2S Heater Harness Connector And Chassis Ground
      G03846059Courtesy of HYUNDAI MOTOR CO.
    2. Is resistance within the specification?

      YES 

      • Go to next step.

      NO 

  3. Check for short to power in control circuit.
    1. Ignition "ON" & Engine "OFF".
    2. Measure voltage between terminal 4 of the HO2S heater harness connector and chassis ground.

      Specification: Approx. 0V

      Fig 3: Measuring Voltage Between Terminal 4 Of HO2S Heater Harness Connector And Chassis Ground
      G03846060Courtesy of HYUNDAI MOTOR CO.
    3. Is voltage within the specification?

      YES 

      NO 

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.