All Models
WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2003 Toyota Tundra, 2003 Toyota Tacoma, 2003 Toyota Sienna, 2003 Toyota Sequoia, and 2003 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.
- Ensure ignition is off. Remove EFI main relay from fuse/relay box at driver's side front corner of engine compartment.
- To test EFI main relay continuity, using ohmmeter, check for continuity and no continuity between specified terminals on EFI main relay. See Figure-Fig 1 .
- To test EFI main relay operation, apply battery voltage and ground to EFI main relay and use ohmmeter to check for continuity between specified terminals on EFI main relay. See Figure - Fig 1 . Replace EFI main relay if defective.