Control Circuit Inspection
- IG "OFF" & Disconnect HO2S (S2) connector.
- IG "ON".
- 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 " procedure.
NO
- Repair or replace as necessary and then, go to "VERIFICATION OF VEHICLE REPAIR " procedure.