Current Pump Circuit Inspection
- IG "OFF" & Disconnect HO2S(S1) connector.
- IG "ON" & ENG "OFF".
- Measure the voltage between Current Pump terminal of HO2S(S1) harness connector and chassis ground.
Specification: Approx. 2-3V
- Is the measured voltage within specification?
YES
- Go to COMPONENT INSPECTION procedure.
NO
- Repair or replace as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.