Quote:
Originally Posted by greyv70
Hello AustenAWD
I would be interested to talk to you further about my car. I've owned the car since Feb this year and despite having been looked after quite well (FSH) the rear Haldex unit seems to have been a bit neglected and to my knowledge the AWD is currently not working.
The car has now done 115k miles and until recently the Haldex unit had no fluid and was completely caked in grime on the outside. I'm guessing a seal has gone somehow causing the fluid to leak out but I've no idea if the filters / pump are blocked as well as it is so difficult to get to.
I normally carry out my own car maintenance but this is a bit beyond me. If this is something that you'd be able to help me with please let me know how to contact you as I am unable to PM you thanks Chris
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What you need to do in order is get the car read with a DICE/VIDA. This will give you a great insight into what you need to do next. If you don't/cant you are feeling you way in the dark.
The DEM unit has a pressure gauge (small) and a control module (large) inside. The pressure gauge sometimes go faulty. If so VIDA/DICE will tell you.
VIDA DICE will also give you live pressure value data - might prove* the sensor works/don't work. see caviat.
Disconnect the pump lead and check the pump works with a 12volt battery- you will hear it running - If you need to change the pump you need to remove the prop shaft ( and 90% the exhaust too). The DEM controller suffers from water ingress damage, and sometimes gives " false" reading to the DEM
* due to DEM damage no pressure is shown on VIDA DICE which claims a pressure valve issue, when the PV is actually ok.- that caught me.
You can get your DEM unit checked out. I tried on company in Kent, who said the unit was fine, and then spent months trying to fix the AWD, when the DEM was infact faulty. Lukas, sorted me a referbed unit which is working great - no DTC'S and lots of AWD.
If you want to ask any questions just ask
Cheers
Bob.