Check Open In Harness
- IG "ON" and disconnect HO2S (B1/S1) connector.
- Measure voltage between signal terminal of HO2S (B1/S1) harness connector and chassis ground. (Measurement "A")
- Measure voltage between signal and ground terminals of HO2S (B1/S1) harness connector. (Measurement "B")
Specification : Voltage difference between measurement "A" and "B" is below 200mV.
- Is the measured voltage within specification?
YES:
- Go to "COMPONENT INSPECTION " procedure.
NO:
- Repair open or contact resistance in harness, and go to "VERIFICATION OF VEHICLE REPAIR " procedure.