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 MANUALSMAZDA1991626 DX, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)SUSPENSIONELECTRONIC SUSPENSIONSUSPENSION - ELECTRONICCOMPONENT TESTINGSPEED SENSOR TEST (929)
1991 Mazda 626 DX, Automatic
Speed Sensor Test (929)
1991 Mazda 626 DX, AutomaticSECTION Speed Sensor Test (929)
- Raise and support drive axle so wheels can be turned by hand. Disconnect control unit wire connector. Control unit is located under right rear seat. Connect ohmmeter between terminal "H" of wire connector and ground. See Figure.
- Ohmmeter should fluctuate continuity and infinity as wheels are manually rotated. If no continuity registers, inspect wire harness for short or open circuit. If wire harness is okay, replace speed sensor and retest system.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.