Check Open In Harness
- IG "OFF" and disconnect HO2S (B1/S2) connector.
- IG "ON" and ENG "OFF"
- Measure voltage between signal terminal of HO2S (B1/S2) harness connector and chassis ground.
Specification:
Approx. 3.5V - when pumping current is ON
Approx. 0.45V - when pumping current is OFF
- Is the measured voltage within specification?
YES:
- Go to "GROUND CIRCUIT INSPECTION " procedure.
NO:
- Repair open in harness, and go to "VERIFICATION OF VEHICLE REPAIR " procedure.