S80 AWD issue mechanical faillure
 

Good evening All,

I have a VIDA message saying mechanical faillure of the oil pump. No pressure actuator sliping (something like that)

2000 miles ago the AWD of the car was working fine on gravel. No idea if the message was already there.

I changed the filter and the oil but still the same DTC message and no AWD.

When the car in P position I can't move the prop shaft or rear wheel shaft.

What can be the problem ? faulty pump ? faulty sensor ?

Thanks for the help.

What is the actual DTC code?
You can check whether or not the haldex oil pump is working by removing electrical connector and connecting a 9v radio battery across the terminals.
You should be able to hear the pump.

You can also get live data via VIDA/DICE of some haldex/dem conponents.

As you cant rotate propshaft it would suggest issue is in the Haldex unit/components or the DEM.

Cheers

Bob

Thanks for the reply. I was abroad. I will have a look tomorrow.

By 9v battery you mean something like this ?

Attachment 119389

Thanks

yes. Thats what I used.

Cheers
Bob

What’s your mileage. My xc70 had a knackered pump at 200k
Haldex filter had never need changed since 06.

I have 71000 miles. I noticed the AWD stop working arround 70000 miles so I decided to change oil and filter. The oil was black but not too bad. Changing oil and filter didn't solve the problem.

I will try to have a go with the 9V battery

It's likely the pump in the AOC coupling, probably the most common failure of them. You should have an error on the dash.

Testing the pump with a 9v battery will tell you if there have been an electrical failure but not mechanical.

Get the oil and filter changed at the same time as the pump.

Thanks for the help all.

So i had a look and...

The error code is DEM-P188974

The pump works with the 9v battery and i can reach a pressure of 0.18MPa on VIDA.

I can also activate the pump with VIDA. I can ear it however the pressure goes up to 0,15mpa. The pump start for 2 seconds and stop. This is normal ?

Any idea ? Or lead so i can have a look at ?

Thanks

look here -


https://forums.swedespeed.com/showth...ue-DEM-P188974

issue appears to be pressure switch inside the DEM

Good luck

Cheers
Bob