Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1997 Toyota Avalon XLSFACTORY OEM SERVICE PROCEDURE
EFI Main Relay
NOTE:
EFI main relay may also be referred to as EFI relay.
- Ensure ignition is off. Remove EFI main relay from relay box at driver's side front corner of engine compartment, near battery.
- To test EFI main relay continuity, use ohmmeter to check continuity between specified terminals. See Fig 1 and Fig 2.
- To test EFI main relay operation, apply battery voltage and ground to relay and use ohmmeter to check continuity between specified terminals. See Fig 1 and Fig 2. Replace EFI main relay if defective.
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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