Control Circuit Inspection
- Ignition "OFF".
- Disconnect HO2S connector.
- IG "ON".
- Measure voltage between VIP terminal of the sensor harness connector and chassis ground.
Specification: Approx. 2~3V
- Measure resistance between VIP terminal and other terminals of the HO2S harness connector.
Specification: Infinite
- Is HO2S display near the specifications?
YES
- Go to next step below
NO
- Repair or replace 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.