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Home >> Kia >> 2004 >> Sorento EX, 4WD, Part Time >> Repair and Diagnosis >> Engine Performance >> Specifications >> Fuel System & Fault Isolation >> DTC Troubleshooting Procedures >> DTC P0155: Ho2S Heater Circuit Bank 2/Sensor 1 >> W/Harness Inspection >> Control Circuit Inspection

Control Circuit Inspection

Check for open in harness 

  1. IG KEY: OFF, Engine: OFF
  2. Disconnect HO2S connector (B-25) and ECM connector.
  3. Measure resistance between terminal 3 of the HO2S harness connector B-25 and A3 of the ECM harness connector B-01.
    1. Specification: Approx. 0Ω
      Fig 1: Measuring Resistance Between Terminal 3 Of HO2S Harness Connector B-25 And A3 Of ECM Harness Connector B-01
      G07703081
  4. Is the resistance near the specified value?

    YES

    1. Go to "Check for Short to Ground in Harness" procedure.

    NO

    1. Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

Check for Short to Ground in Harness 

  1. IG KEY: OFF, Engine: OFF
  2. Disconnect HO2S connector (B-25).
  3. Measure resistance between terminal 3 of the HO2S harness connector B-25 and chassis ground.
    1. Specification: Approx.?
      Fig 2: Measuring Resistance Between Terminal 3 Of HO2S Harness Connector B-25 And Chassis Ground
      G07703082
  4. Is the resistance near the specified value?

    YES

    1. Go to "COMPONENT INSPECTION " procedure.

    NO

    1. Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
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