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.
1988 Mazda RX-7 Base, 2D ConvertibleFACTORY OEM SERVICE PROCEDURE
Feedback System
- Connect self-diagnosis checker to connector. See Figure . Place select switch in the "B" position. Disconnect neutral switch connector. Operate engine at idle to normal operating temperature. Shut off engine. On turbo models, remove intercooler. See Figure .
- On all models, disconnect throttle sensor connector. See Fig 1 . On turbo models, reinstall intercooler. On all models, start engine and allow to idle. Self-diagnosis checker should read trouble code 06 with monitor light on.
- Increase engine speed to 1500-2000 RPM and note that monitor light starts to flash within 10 seconds after increasing engine speed. Trouble code 06 should be indicated with monitor light flashing more than 8 times per 10 seconds.
- Maintain engine speed at 1750 RPM and disconnect oxygen sensor connector. See Fig 1 . Monitor light should be off and trouble code 05 should exist. Replace ECU if any deviation from normal readings exists.
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.