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Signal Circuit Inspection

IG KEY "OFF".
Disconnect HO2S (S2) connector.
IG KEY "ON" & ENG "OFF"
Measure the voltage between signal terminal of HO2S (S2) harness connector and chassis ground.
Specification: Approx 0.45V
Is the measured voltage within specification?
YES
- Go to "GROUND CIRCUIT INSPECTION " procedure.
NO
- Repair Open or Short circuit and then, go to "VERIFICATION OF VEHICLE REPAIR " procedure.