Porsche Repair Questions? Ask a Mechanic for Answers ASAP
Hey there, thanks for the question.
did you make sure the connectors were seated properly? I have seen connectors that are corroded or damaged cause the fan modules to make them run randomly or continuously.
otherwise you could have an issue with the temp sensor on the passengers side of the block.
let me know how I can help further please.
If i recall correctly its underneath the passengers side of the intake manifold. Tight little spot of course.
I know some touregs and "maybe" the cayenne too has a fan switchseperate from the actual temp sensor ad its on the radiator water outlet.
Hey, sorry for the delay.
I don't have any meter specific testing documentation. Testing would be done taking a coolant temp reading and looking at the live data stream from the temp sensor switch itself.
Technically the answer would be both of them.
The one on the radiator inlet pipe is what tells the fans to run when the engine is off, the one on the thermostat housing is what tells the computer engine temperature and regulates by operating the fan while driving/idling/etc.
is the large wire staying to ground when the engine is on? or are the fans shutting off when you start the engine?
if you can upload your wiring diagram I will be happy to look at it for you.
I don't have one here at home for it.
sounds like the fan module, was pretty common early on with these trucks which is why they started selling the module seperate from the fan assembly later on and issues the TSB, but you already said you replaced it.
hey sorry, busy day :)
does the fan shut off when you start the engine? even thought the small wire is switching ground to power?
also, bizarre as this sounds - disconnect the fan module and reconnect it for me.