Signal Circuit Inspection

IG "OFF" & Disconnect HO2S (B1/S1) connector.
IG "ON" & ENG "OFF".
Measure the voltage between signal terminal of HO2S (B1/S1) harness connector and chassis ground.
Specification: Approx 0.45V
Is the measured voltage within specification?
YES
- Go to "GROUND CIRCUIT INSPECTION " procedure.
NO
- Repair or replace as necessary and then, go to "VERIFICATION OF VEHICLE REPAIR " procedure.