Hi all,anyone clued up on diesel vw transporter vans? When ignition is turned on now, all the coolant fans are coming on. Are they controlled via the ecu using a coolant sensor? Is this how modern diesels work? Thanks in advance..

 

if you look the fan will be belt driven, it stay,s on all the time.

my passat and bora are like this..... so i assume the transporter will be same

 

is it t4 or t5, has it got air con ?.

 

Says fans are coming on when ignition is turned on so probably not belt driven.

As above, does it have air con? I know on the fords the a/c comes on automatically when the fan position is set to windscreen, thus turning on the fans. Maybe vw are the same?

 

sometimes this also happens in limp home

 

Sorry,its a t5 2.5 130. No belts at all on the van. Its not in limp mode as it still goes like fook. It has got aircon but makin no difference

 

you need someone with vag-com

 

Could be coolant temp sensor thats gone

 

or possibly pressure switch for air con, if detects a faulty high pressure reading wil bring the fans on to try to cool it down.