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.
Continuity Test (B2200, B2600i, Miata, MX-6 & 626)
Remove speedometer from dash panel. Connect ohmmeter to appropriate terminals of printed circuit connector. SeeFig 1 , Fig 2 or Fig 3 . See SPEED SENSOR TERMINAL IDENTIFICATION . Rotate speedometer drive cable. Ensure continuity cycle is 4 times per revolution. If continuity cycle is not 4 times per revolution, replace speedometer.
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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.