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 MANUALSMAZDA1993MPV BASE, 3D VAN WAGON, 2.6 1REPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - SYSTEM/COMPONENT TESTS - EFICOMPUTERIZED ENGINE CONTROLSPOWERTRAIN CONTROL MODULE (NAVAJO)GROUND CIRCUITS
1993 Mazda MPV Base, 3D Van Wagon, 2.6 1
Ground Circuits
1993 Mazda MPV Base, 3D Van Wagon, 2.6 1SECTION Ground Circuits
- Locate Powertrain Control Module (PCM) behind right kick panel. Using a DVOM, check for continuity to ground on PCM terminals No. 40 and 60. See Figure . Reading on DVOM should be zero ohms. If reading is not zero ohms, repair open to ground.
- Using a voltmeter, touch negative lead of voltmeter to a good ground. Touch positive lead of voltmeter to each ground terminal. With engine running, voltmeter should indicate less than one volt. If reading is one volt or more, check for open, corrosion and loose connection on ground lead.
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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.