Control Circuit Inspection
■ Check voltage
- IG "OFF". Disconnect HO2S connector.
- IG "ON".
- Measure voltage between Heater Control terminal of the HO2S harness connector and chassis ground.
Specification: 2~3V
- Is voltage within the specification?
YES
- Go to "Component Inspection " procedure.
NO
- Repair as necessary and go to "Verification of Vehicle Repair " procedure.
NOTE:
HO2S must have a clean air reference to function properly. The air is obtained by way of the sensor wire (s). Do not attempt to repair the wire (s), connector, or the terminals.