Component Inspection

■ Visual Check HO2S (B1S1) 

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

■ Check Linear HO2S (B1S1) performance 

1. Warm up the Engine to normal operating temperature.
2. Connect VMI to KDS/GDS and select "Oscilloscope".
3. Connect CH A (+) probe to Nernst cell voltage terminal (Pin No. 1) of HO2S (B1S1) connector.
4. Connect CH A (-) probe to Pump cell voltage terminal (Pin No. 6) of HO2S (B1S1) connector.
5. Connect CH B (+) probe to Common ground terminal (Pin No. 3) of HO2S (B1S1) connector.
6. Connect CH B (-) probe to Compensated resistance terminal (Pin No. 4) of HO2S (B1S1) connector.

   Specification:  Refer to Fig 1

   Fig 1: Screen Display - Signal Waveform Of HO2S (B1S1) 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 re-do 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.