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Coolant Temperature Sensor Test - Code 13

  1. Disconnect 16-pin connector. Measure the resistance between terminals No. 23 and 26. If resistance readings are okay, replace control unit. If not okay, check wiring harness. If harness is okay, place the sensor into water that is maintained at the specified temperature(s) in the COOLANT SENSOR TEMPERATURE/RESISTANCE RELATIONSHIP  table.
    COOLANT SENSOR TEMPERATURE/RESISTANCE RELATIONSHIP

    Temperature: °F (°C) Resistance Ohms
    14°F (10°C) 7000-11400
    68°F (20°C) 2100-2900
    122°F (50°C) 680-1000
    176°F (80°C) 260-390
    212°F (100°C) 180-200
  2. If the readings of the sensor do not match the ones in the table, replace temperature sensor. If readings match the ones in the table, sensor is good, replace the control unit.
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