Location of cooling fan relays on RHD allroad?

[john535is]

Hi,
I have a 2.7t 2004 allroad and the cooling fan starts at a high speed then after the engine is running for about 40 seconds just goes to super high warp speed.
if I set the a/c to econ it turns the fans (both engine cooling and a/c) off
I changed the lower 4 pin water temp sensor with no change.
I changed the fan control unit near the left intercooler with no change.
The Bentley manual suggests relays are located on the 8 fold panel adjacent the steering column, or the 3 fold panel in the ecu box in the plenum. Neither location has the fan and high speed fan relays.
Any suggestions, it’s 40 deg C here in Sydney this week.

john535is

[Crasher]

I need to check the wiring diagram at work but the fans action suggests the controller sees the engine is running but cannot see the temperature/command signal so it is programmed to assume the engine is overheating. Quite warm here today as well, might even get into double figures… maybe.

[john535is]

Thanks Crasher,
it appears the green temperature sensor at the back of the engine is the culprit.
while it didn’t throw any errors I replaced it mainly because I was out of other ideas and I had one and that has stopped the fans going to super high speed.
I thought the sensor at the radiator lower hose controlled the fan speed but your comment helped to think about what tells the fans to run
thanks
john