Component Inspection

■ Visual Check of HO2S (B1S1) 

1. IG "OFF" and disconnect HO2S (B1S1) connector.
2. Check that HO2S (B1S1) is contaminated or damaged by foreign materials.

■ Check HO2S (B1S1) Performance 

1. Warm up the engine to normal operating temperature.
2. Connect VMI to GDS and select "Oscilloscope".
3. Connect Channel A positive probe to Pin No. 1 (high) and Channel A negative probe to Pin No. 2 (low).

   Specification:  Refer to Fig 1

   Fig 1: Screen Display - Signal Waveform Of O2S1 At Normal Condition

   Courtesy of KIA MOTORS AMERICA, INC.

■ Confirm Part Inspection 

1. Does the HO2S (B1S1) operate properly? (Check Variation)

   YES 

   • Go to "VERIFICATION OF VEHICLE REPAIR " procedure.

   NO 

   • Carefully redo this troubleshooting guide steps.
   • If no problems were found with the circuits or connectors, replace the HO2S (B1S1) and go to "VERIFICATION OF VEHICLE REPAIR " procedure.