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 below.
NO
- Repair Open or Short circuit and then, go to "Verification of Vehicle Repair " procedure.