Many malfunctions in the electrical system are caused by poor harness and terminals.
Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
Has a problem been found?
YES
Repair as necessary and go to "Verification of Vehicle Repair" procedure.
NO
Go to " Signal Circuit Inspection " procedure.
IG "OFF".
Disconnect HO2S(B1/S2) connector.
IG "ON" & ENG "OFF".
Measure voltage between terminal 1 of HO2S(B1/S2) and chassis ground.
Specification : Approx. 0.45V
Is the measured voltage within specification ?
YES
Go to "Component Inspection" procedure.
NO
Repair or replace as necessary and then, go to "Verification of Vehicle Repair"procedure.