Fan Controller Check

WARNING: This page is about a different car, the 2003 Mitsubishi Outlander. However, it is still accessible from the selected car via links, so may be relevant.

Remove the fan controller 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: Removing Fan Controller Connector & Measuring Voltage Between Harness-Side Connector Terminals
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Connect the fan controller 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 controller-side connector terminals.
Standard value: 1V or less

Fig 2: Measuring Voltage Between Fan Controller-Side Connector Terminals
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Turn the A/C switch to the "ON" position.

WARNING: Stay clear of the fan when the fan starts running.

Measure the voltage between the fan controller-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 V
2. Battery positive voltage +/- 2.6 V
If the voltage does not repeatedly change as indicated, replace the fan controller.