Coolant Temperature Sensor/Switch (For Computer): Testing and Inspection

1987 Dodge Shadow L4-135 2.2L SOHC TurboSECTION Testing and Inspection

1. Place ignition switch in Off position, then disconnect coolant temperature sensor electrical connector.
2. Connect suitable ohmmeter across coolant temperature sensor terminals and measure sensor resistance.
3. Resistance should measure 700-1000 ohms with sensor at normal operating temperature (200°F) and 7000-13000 ohms with sensor at room temperature (70°F). If ohmmeter reading is not as specified, replace coolant temperature sensor.


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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.