This is the Control module and motor for the cooling fan off a Volvo XC90. When the vehicle come to us for repair the rad fan would fail to cut in when the vehicle was reaching high temperatures at tick over.
We plugged in our diagnostic computer to the engine management. It came back with a fault with the coherence for the rad fan motor. These units are rather expensive only being available from the main dealer at a cost of over £400 so we decided to open the unit up carefully and take a look at it.
As you can see from the picture there is a control board a relay and numerous capacitors. We Identified a fault with the connections on the board and repaired them. The unit was then sealed back to together and fitted to the vehicle for test.
Using our diagnostic computer we switch the fan request on to make sure the fan cut in. Finding everything working fine we put the vehicle back together and put in on test for a good while. By repairing this unit we saved the customer a huge amount of money on their final bill by not having to replace the control module.