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 MANUALSMAZDA1991RX-7 TURBOREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - SYSTEM/COMPONENT TESTSCOOLANT TEMPERATURE SWITCH TEST
1991 Mazda RX-7 Turbo
Coolant Temperature Switch Test
1991 Mazda RX-7 TurboSECTION Coolant Temperature Switch Test
- Remove switch from radiator or engine block. Place switch in container of coolant with thermometer. Connect ohmmeter to switch terminals. Slowly heat coolant.
- Note temperature at which continuity exists between switch terminals. Continuity should be present with coolant temperature greater than 207°F (97°C) and continuity should not be present with temperature less than 194°F (90°C). Replace switch if not operating as described.
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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.