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Home >> Subaru >> 1987 >> GL 2D Hatchback, 1.6 2 >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Injection System - BOSCH AFC >> Testing >> Coolant Temperature Sensor
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Coolant Temperature Sensor

  1. Warm engine to normal operating temperature and stop engine. Using a thermometer, measure temperature of coolant. Disconnect negative battery cable and sensor electrical connector.
  2. Connect ohmmeter leads to both terminals of sensor. Readings should be as specified for corresponding temperatures. See COOLANT TEMPERATURE SENSOR RESISTANCE  table. If not, replace coolant temperature sensor.
COOLANT TEMPERATURE SENSOR RESISTANCE

Temperature °F (°C) Resistance (Ohms)
68 (20) 2100-2900
122 (50) 700-1000
176 (80) 400-600
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