Vehicle & Technical > Discovery

Leaking Oil - Now Cooling Fan problem

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Damonski:
Well just heard from the garage all back together but no cooling fans now :(

Its not the sender and if they short the relay the fans start.  Any ideas before I agree to yet more cost for them to find out the problem ?

Cheeeeers

Damonski:
any cheap v8i's ? :roll:

Damonski:
Ok more on this....

Collecting it back from the garage in the morning anyway.

The gauge sender unit works fine, the relay works fine when earthed and the fan kicks in. There seems to be a problem in the ECU connection.

He recommend for now a manual fan switch to kick the relay in, and then look at a new sender mounted somewhere to control the relay.

Is the relay controlled by the ECU and are there any good tips to maybe bypass the ECU and kick the relay in automatically ?

Cheers

muddyweb:
Don't know about the Mpi, but on my engine, there are 2 coolant temperature sensors... one supplies the guage and the other sends data to the ECU for fuel control, etc.

Just a thought... if you have 2, the ECU sensor might be faulty.


Failing that, you can put a thermostatically controlled fan controller in (from the likes of Demon Tweeks / Merlin Motorsport) and have that control the fan directly.

Damonski:
According to the rave cd thingie I have two, but I only remember seeing one that I know has been replaced, not by me tho, the X126 Engine Coolant Temperature Sensor.

To eliminate the sensor if I was to ground this whilst the engine is running, should the fan kick or, or is the ECM clever enough to want a particular resistance?

In other words any volunteers to ground there and tell me :)

Im thinking that maybe the replacement isnt the correct one.

Failing that Im putting in a switch to ground the relay contacts until I get chance to fit an additional sensor of some description.

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