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.
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HOMESERVICE MANUALSTOYOTA2005CELICA GT-S, STANDARDREPAIR AND DIAGNOSISENGINE PERFORMANCEENGINE CONTROL SYSTEMSSFI SYSTEMEFI MAIN RELAYINSPECTION
2005 Toyota Celica GT-S, Standard
EFI Main Relay: Inspection
2005 Toyota Celica GT-S, StandardSECTION Inspection
- REMOVE EFI MAIN RELAY (Marking: EFI)
- INSPECT EFI MAIN RELAY CONTINUITY
- Using an ohmmeter, check that there is continuity between terminals 1 and 2.
If there is no continuity, replace the relay.
- Check that there is no continuity between terminals 3 and 5.
If there is continuity, replace the relay.
- Using an ohmmeter, check that there is continuity between terminals 1 and 2.
- INSPECT EFI MAIN RELAY OPERATION
- Apply battery voltage across terminals 1 and 2.
- Using an ohmmeter, check that there is continuity between terminals 3 and 5.
If there is no continuity, replace the relay.
- REINSTALL EFI MAIN RELAY
RENDER: 1.0x
NO RELATED
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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.