Control Circuit Inspection
- Ignition "OFF"
- Disconnect HO2S connector.
- Ignition "ON" & Engine "OFF"
- Measure voltage between Heater Control terminal of the HO2S harness connector and chassis ground.
Specification: Approx. 2.5V
- 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.