Oxygen Sensor Relay: Inspection
WARNING: This page is about a different car, the 2014 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.
- Check that the oxygen sensor relay has no deformation, cracks or other damages.
- Measure the resistance between oxygen sensor relay terminals.
Courtesy of SUBARU OF AMERICA, INC.
Terminal No. Standard 1 and 2 1 MΩ or more 3 and 4 93.8 - 136.4 Ω (when 20°C (68°F)) - Connect battery positive terminal to terminal No. 3 and battery ground terminal to terminal No. 4, and measure the resistance between oxygen sensor relay terminals.
Courtesy of SUBARU OF AMERICA, INC.
Terminal No. Standard 1 and 2 Less than 1 Ω