Signal Circuit Inspection

■ Check voltage 

1. IG "OFF" and disconnect HO2S (S2) connector.
2. IG "ON".
3. Measure voltage between signal terminal of HO2S (BS2) harness connector and chassis ground.

   Specification:  Approx. 0.45V

   Fig 1: Measuring Voltage Between Signal Terminal Of HO2S (BS2) Harness Connector And Chassis Ground

   Courtesy of KIA MOTORS AMERICA, INC.
   Fig 2: HO2S (BS2) Harness Connector Terminals

   Courtesy of KIA MOTORS AMERICA, INC.
4. Is the measured voltage within specification?

   YES 

   • Go to "GROUND CIRCUIT INSPECTION " procedure.

   NO 

   • Repair short to battery in harness, and go to "VERIFICATION OF VEHICLE REPAIR " procedure.