Coolant Temperature Sensor Testing

1991 Subaru Legacy L, 4D Sedan, AWD, StandardSECTION Coolant Temperature Sensor Testing

Disconnect coolant temperature sensor connector. Connect ohmmeter leads between sensor terminals. See COOLANT TEMPERATURE SENSOR RESISTANCE table.

COOLANT TEMPERATURE SENSOR RESISTANCE

Temperature Ohms
14°F (-10°C) 7000-11,500
68°F (20°C) 2000-3000
122°F (50°C) 700-1000
RENDER: 1.0x

NO RELATED

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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.