Component Inspection

Inspection Condition	(+) Probe		(-) Probe		Reference
Inspection Condition	Connector	Terminal	Connector	Terminal	Reference
Engine "ON" (warm up condition).	HO2S (B1/S1) connector	6 (current pump)	HO2S (B1/S1) connector	4 (current adjust)	Fig.1
Engine "ON" (warm up condition).	HO2S (B1/S1) connector	1 (nernst cell)	HO2S (B1/S1) connector	3 (virtual ground)	Fig.1

Courtesy of KIA MOTORS AMERICA, INC.

Good

No Good

Carefully re-do this troubleshooting guide steps.
If no problems were found with the circuits or connectors, replace the HO2S (B1/S1) and go to "VERIFICATION OF REPAIR " procedure.