Inspection Procedure

1. Connect a Hi-Scan (Pro) to the data link connector.
2. Start engine and warm up the vehicle until cooling fan operates.

Does scan tool display DTC P0036?

1. Yes:  Go to next step.
2. No: Problem is intermittent or was repaired and ECM memory was not cleared. see INTERMITTENT PROBLEM INSPECTION PROCEDURE ..

1. Turn ignition switch to OFF position and disconnect HO2S connector.
2. Measure resistance between terminals 3 and 4 of the HO2S connector.

   Specification (HO2S resistance):

   Fig 1: Heater Resistance Specifications

   Courtesy of KIA MOTORS AMERICA, INC.
   Fig 2: Checking Heater Resistance

   Courtesy of KIA MOTORS AMERICA, INC.

Is resistance within specification?

1. Yes:  Go to next step.
2. No: Replace HO2S.

1. Turn ignition switch to OFF position, and then disconnect HO2S and ECM connector.
2. Measure resistance between terminal 4 of the HO2S harness connector and 9 of the ECM harness connector.

   Specification (Resistance): below 1Ω

   Fig 3: Checking For Open In Harness

   Courtesy of KIA MOTORS AMERICA, INC.

Does the resistance indicate continuity?

1. Yes:  Go to next step.
2. No: Repair open in harness.

1. Turn ignition switch to OFF position, and then disconnect HO2S and ECM connector.
2. Measure resistance between terminal 4 of the HO2S harness connector and chassis ground.

   Specification (Resistance): infinite

   Fig 4: Checking For Short To Ground In Harness

   Courtesy of KIA MOTORS AMERICA, INC.

Does the resistance indicate open?

1. Yes:  Go to next step.
2. No: Repair short or short to chassis ground in harness.

1. Turn ignition switch to OFF position, and then disconnect HO2S and ECM connector.
2. Measure resistance between terminal 4 of the HO2S harness connector and chassis ground.

   Specification (Resistance): below 0.5V

   Fig 5: Checking For Short To Power In Harness

   Courtesy of KIA MOTORS AMERICA, INC.

Is voltage within specification?

1. Yes:  Go to next step.
2. No: Repair short to power in harness.

1. Remove HO2S.
2. Thoroughly check HO2S for contamination, deterioration or damage.

Is HO2S contaminated, deteriorated or damaged?

1. Yes:  Replace HO2S.
2. No: Clean or replace HO2S.