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Coolant Temperature Sensor Test - 5000CS Turbo

  1. Disconnect wire from coolant temperature sensor. Connect ohmmeter between ground and coolant temperature sensor. Ohmmeter reading should be 60-1000 ohms.
  2. If not, replace coolant temperature sensor. If reading is correct, check sensor wiring. Remove ignition control unit panel located on passenger side footwell. Unplug ignition control unit connector.
  3. Using an ohmmeter, check continuity between terminal No. 10 of control unit connector and coolant temperature sensor wire. Ohmmeter reading should be close to zero ohms. If reading is incorrect, check for open circuit in wiring. If reading is correct, replace ignition control unit.
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