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Fan Control Module Check

  1. Remove the fan control module connector.
  2. Turn the ignition switch to the "ON" position, and measure the voltage between the harness-side connector terminals.
    1. Standard value: Battery positive voltage 
      2. Fig 1: Measuring Voltage Between Harness-Side Connector Terminals
      G00856162Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  3. Connect the fan control module connector, and disconnect the condenser fan motor connector.
  4. Ensure that the A/C switch is off, and start the engine and run it at idle.
  5. Measure the voltage between the fan control module-side connector terminals.
    1. Standard value: 1V or less 
    WARNING: Stay clear of the fan when the fan starts running.
    Fig 2: Measuring Voltage Between Fan Control Module-Side Connector Terminals
    G00856163Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  6. Turn the A/C switch to the "ON" position.
  7. Measure the voltage between the fan control module-side connector terminals while the fan is running. The voltage should repeat the values 1) and 2) below.
    1. Standard value: 
      1. 8.2+/-2.6 V 
      2. Battery positive voltage+/-2.6 V 
  8. If the voltage does not repeatedly change as indicated, replace the radiator fan motor.
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