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HOMESERVICE MANUALSTOYOTA1990TERCEL BASE, 2D COUPE, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE MECHANICALCOOLING SYSTEM (MECHANICAL)ENGINE COOLING SYSTEMSELECTRIC COOLING FANCOOLING FAN QUICK TEST (TERCEL)
1990 Toyota Tercel Base, 2D Coupe, Standard

Cooling Fan Quick Test (Tercel)

1990 Toyota Tercel Base, 2D Coupe, StandardSECTION Cooling Fan Quick Test (Tercel)
  1. Ensure engine coolant temperature is below 172°F (78°C) on carbureted engine, below 181°F (83°C) on fuel injected engine. Turn ignition on. Fan motor should not run. If it does, check cooling fan relay, coolant temperature switch, and wiring.
  2. With ignition on, unplug coolant temperature switch. Fan motor should operate. If not, check cooling fan relay, fan motor, engine main relay, fuse, and wiring.
  3. Reconnect coolant temperature switch. Start engine and raise coolant temperature above 192°F (89°C) on carbureted engine, above 201°F (94°C) on fuel injected engine. Fan motor should operate.
  4. Allow coolant temperature to drop. Fan motor should stop when coolant temperature is below 172°F (78°C) on carbureted engine, below 181°F (83°C) on fuel injected engine. If not, replace coolant temperature switch.
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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

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  • • 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.