Fan Control Module Check <3.8L Engine>

Remove the fan control module connector.
Turn the ignition switch to the "ON" position, and measure the voltage between the harness-side connector terminals.
Standard value: Battery positive voltage

Fig 1: Measuring Voltage Between Fan Control Module Connector Terminals 1 And 3
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Connect the fan control module connector, and disconnect the condenser fan motor connector.
Ensure that the A/C switch is off, and start the engine and run it at idle.
Measure the voltage between the fan control module-side connector terminals.

Fig 2: Measuring Voltage Between Fan Control Module Connector Terminals
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

Standard value: 1 volt or less

WARNING: Stay clear of the fan when the fan starts running.
Turn the A/C switch to the "ON" position.
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.
Standard value:
1. 8.2 ± 2.6 volts
2. Battery positive voltage ± 2.6 volts
If the voltage does not repeatedly change as indicated, replace the radiator fan motor.