Component Testing
- Ignition OFF, disconnect the harness connector at the HO2S.
- Test for 3-35 ohms of resistance between the ignition 1 voltage terminal 4 and the control terminal.
- HO2S (EURO IV) heater control terminal 2
- HO2S (Non EURO IV) heater control terminal 3
- If not within the specified range, replace the HO2S.