Component Inspection

Inspection Condition	Inspection Procedure	Reference
Engine "ON".	Connect KDS to "Data Link Connector (DLC)". Perform "Actuation Test" of concerned component with KDS.	Fig.1

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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.