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.
2000 Toyota MR2FACTORY OEM SERVICE PROCEDURE
Test No. 2: Ignition Switch Power Source Circuit: Testing
- Check AM1 and GAUGE fuses located under left side of instrument panel. If fuses are okay, go to next step. If either fuse is open, locate and repair short circuit. See WIRING DIAGRAMS . Replace fuse(s).
- Disconnect body ECU connectors. Turn ignition on. Measure voltage between body ECU harness 25-pin connector terminal No. 15 and ground. If voltage is 9-14 volts, go to next test listed. See appropriate TROUBLE SHOOTING SYMPTOMS table under TROUBLE SHOOTING. If voltage is not 9-14 volts, go to next step.
- Check wiring and connectors between body ECU and ground. See WIRING DIAGRAMS . Repair ground circuit as necessary. If ground circuit is okay, repair wiring or connectors between battery and body ECU.
Factory Service Tools
Use the Manual With the Right Hardware
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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.