Signal Circuit Inspection
- IG "OFF" and disconnect HO2S (B1/S1) connector.
- IG "ON" & ENG "OFF"
- Measure voltage between terminal 3 of HO2S (B1/S1) 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.