Engine Compartment Blower Problem.

[deliriousga]

I am having trouble with the blower in the engine compartment not coming on. The red coolant temp light flashes slowly so I checked it out and found the fan not operating. :rolleyes:

Here's what I've done so far:

1) Replaced the relay and no change.

2) Tested connections to the relay for power. All incoming have 12V and light mV on the outgoing to the fan.

3) Jumped the relay to see if the fan turns on. Fan works when jumped. I tried jumping it from each incoming connection on the relay. Two of them will make the fan turn on but it won't stop when the car is turned off so I disconnected that and put the relay back in.

4) Swapped out all of the relays that are the same type as the engine compartment fan relay.

5) Checked all fuses, none blown.

Are there switches/sensors tell the engine compartment fan to turn on I can check?

Thanks! :cheers:

[Loren]

Yes, there is a sensor in the engine compartment. Here are the conditions that he fan should come on at.

Switch-on conditions for engine compartment fan

The engine compartment fan is switched on when the engine compartment temperature is > 80 °C

or

the coolant temperature is > 102 °C.

After-running of engine compartment fan

If the ignition is switched off and the engine compartment temperature is more than 60 °C, the DMEcontrol module remains in readiness for another 20 minutes. During this time, the engine compartment temperature is retrieved every 10 seconds. If the engine compartment temperature is > 85 °C, the engine compartment fan is switched on for 20 seconds. If the engine compartment temperature is still> 85 °C after this time, the fan remains on for a further 30 seconds.