A/F Heater Relay: Highlander
WARNING: This page does not describe the selected car, but rather 11 other vehicles, including the 2003 Toyota Tacoma, 2003 Toyota RAV4, 2003 Toyota Prius, 2003 Toyota Matrix, and 2003 Toyota MR2. However, it is still accessible from the selected car via links, so may be relevant.
- Remove A/F heater relay from fuse/relay box at driver's side front corner of engine compartment, just in front of strut tower. To test A/F heater relay continuity, using ohmmeter, check for continuity and no continuity between specified terminals on A/F heater relay. See Fig 1.
- To test A/F heater relay operation, apply battery voltage and ground to A/F heater relay. Using ohmmeter, check for continuity between specified terminals on A/F heater relay. See Fig 1. Replace A/F heater relay if defective.