Radiator Cooling Fan Control Module: Testing and Inspection

FAN CONTROL MODULE INSPECTION [MZI-3.7]

1. Connect the M-MDS to the DLC-2.






2. Start and warm up the engine.

3. Monitor the engine coolant temperature with the M-MDS.

4. Measure the voltage at terminal 2 of the fan control module connector (2 terminals) as shown in the table.






- If not within the specification, inspect the input signals from the following parts.

- Cylinder Head Temperature (CHT) sensor
- Refrigerant pressure switch (middle)

Single fan control module





Dual fan control module





*1
Refrigerant pressure switch (middle) is off.
*2
Refrigerant pressure switch (middle) is on.

5. If all the above parts are normal, replace the fan control module.