Control Circuit Inspection

IG "OFF" & Disconnect HO2S(S1) connector.
IG "ON" & ENG "OFF".
Measure voltage between control terminal of HO2S(S1) heater harness connector and chassis ground.

Specification: Approx. 3.5V

Is the measured voltage within specification?
YES
- Go to "COMPONENT INSPECTION "
NO
- Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.