H46 - Check For Closed Contact In the HO2S Heater Relay

Oxygen Sensor Heater Relay:

- Key "OFF".

- Heated Oxygen Sensor (HO2S) heater relay removed from power distribution box.

- Measure the resistance between the VPWR and the HO2S HTR terminals on the HO2S heater relay.

- Is the resistance less than 5.0 ohms?

Yes -- Replace HO2S heater relay. Do not rerun Quick Test.

No -- Go to H47.