Power Circuit Inspection
- IG "OFF" & Disconnect HO2S (B1/S2) connector.
- IG "ON" & ENG "OFF".
- Measure voltage between terminal 1 of HO2S (B1/S2) harness connector and chassis ground.
Specification: B+
- Is the measured voltage within specification?
YES
- Go to HO2S (B1/S2) heater "CONTROL CIRCUIT INSPECTION " procedure.
NO
- Repair open or short to ground in HO2S (B1/S2) Heater power circuit then, go to "VERIFICATION OF VEHICLE REPAIR " procedure.