Component Inspection

Inspection Condition	Inspection Procedure	Reference
Ignition "ON", engine "ON".	Connect KDS to Data Link Connector (DLC). Monitor parameters in "Current Data" with KDS.	Figure below

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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/S2) and go to "VERIFICATION OF REPAIR " procedure.