Check Open In Harness
- IG "OFF" and disconnect HO2S (B1/S2) and PCM connector.
- Measure resistance between control terminal of HO2S (B1/S2) heater harness connector and heater control terminal of PCM harness connector.
Specification : Approx. below 1Ω
- Is the measured resistance within specification ?
YES:
- Go to "COMPONENT INSPECTION " procedure.
NO:
- Repair open in HO2S (B1/S2) heater control circuit and go to "VERIFICATION OF VEHICLE REPAIR " procedure.