4. Check For Short To Ground In Harness

1. Disconnect ECM connector.
2. Measure resistance between terminal 6 of HO2S harness connector and chassis ground.
   Fig 1: Checking HO2S Harness For Short To Ground

   Courtesy of HYUNDAI MOTOR CO.
   • Specification : infinite 

Does resistance indicate open? 

Yes: Go to next step.

No: Repair short to chassis ground in harness.