Fan Controller Check

Remove condenser fan motor connector.
Start the engine and run it at idle.
Turn the A/C switch to ON and maintain the coolant temperature at 80°C (176°F) or less.

Fig 1: Measuring Voltage Between Fan Controller-Side Connector Terminals

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

When measuring the voltage between the fan controller-side connector terminals, check that the value changes repeatedly as indicated by (1) - (3) below.
1. 0 V
2. 8.2 plus/minus 2.6V
3. Battery positive voltage plus/minus 2.6 V
If the voltage does not repeatedly change as indicated, replace the radiator fan motor and the fan controller assembly.