Current Pump Circuit Inspection
- IG KEY "OFF".
- Disconnect HO2S (S1) connector.
- IG KEY "ON" & ENG "OFF".
- Measure the voltage between Current Pump terminal of HO2S (S1) harness connector and chassis ground.
Specification: Approx 2.8V
- Is the measured voltage within specification?
YES
- Go to "COMPONENT INSPECTION " procedure.
NO
- Repair Open or Short circuit and then, go to "VERIFICATION OF VEHICLE REPAIR " procedure.