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 LE, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ELECTRICALGAUGESINSTRUMENT PANEL - STANDARDCOMPONENT TESTINGTEMPERATURE GAUGE SENDING UNITEXCEPT NAVAJO
1991 Mazda 626 LE, Standard
Except Navajo
1991 Mazda 626 LE, StandardSECTION Except Navajo
- Remove temperature gauge sending unit from engine. Place temperature gauge sending unit in a pan of water with a thermometer. Gradually heat water.
- Ensure resistance of temperature gauge sending unit is 49-58 ohms at 176°F (80°C) on B2200, B2600i, MX-6, RX7 and 626; 103 ohms at 140°F (60°C) on 929; or 190-260 ohms at 122°F (50°C) on Miata, MPV, Protege and 323. Replace temperature gauge sending unit if resistance is not within specification.
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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.