XC90 REM / anti-skid service and park assist service.

[mottm]

Hello.
I have a xc90 2011.
I have had 2 messages pop up at the same time. Anti-skid service required and park assist service required.
I have checked all fuses on the REM but all seem ok.
Fuses 20 upwards though does not any power. Think these had a ignition feed. All other fuse locations have live feed which is permanent.

Has anyone any ideas how I can resolve this?

Many Thanks in advance,
Mark.

[SwissXC90]

I think you are looking at two completely different faults

For park assist, unplug the connection from the park assist control modul in the trunk, and then reconnect and try again.
Otherwise, you need VIDA to check what the fault is - it could be any one of the 4 or 8 sensors on the vehicle

And while VIDA is connected you can find out what is causing the anti.slid service required message. Could be any wheel speed sensor.

[mottm]

Ok I will unplug and plug the parking sensors later.
But this won't solve the no power on the REM on fuses above location number 20.

[SwissXC90]

Originally Posted by mottm

Ok I will unplug and plug the parking sensors later.
But this won't solve the no power on the REM on fuses above location number 20.

What power feeds are you checking?
In what vehicle state? Sleep? Key out? Key in? PosI? PosII?
Do you have every single function failing? If not then it tells you simply that the power on the fuse is only present when the function is active.

Here are the functions and values of fuses F21 to F38:

F21 Spare - 10A
F23 4/82 Differential Electronic Module (DEM) - 7.5A
F26 4/86 Parking Assistance Module (PAM) - 5A
F27 Main fuse for F20, F21, F23, F24, F26 - 30A
F28 3/76 Lock unit, left rear door
3/77 Lock unit, right rear door
3/78 Lock unit, tailgate
6/37 Lock motor, fuel filler flap 15A
F29 4/110 Trailer Module
- running light
- left-hand direction indicator
26/4 Converter, direction indicators & brake lights, USA
- running light
- left-hand direction indicator - 25A
F30 4/110 Trailer Module
- brake lights
- fog lights
- right-hand direction indicator - 25A
F31 Main fuse for F37-F38 - 40A
F37 9/2 Heated rear window - 20A
F38 9/2 Heated rear window - 20A

[mottm]

Hello,
When the engine is running, I do not get any volt readings through:
Fuse 20
Fuse 23
Fuse 24
Fuse 26
Fuse 37
Fuse 38.

[SwissXC90]

Originally Posted by mottm

Hello,
When the engine is running, I do not get any volt readings through:
Fuse 20
Fuse 23
Fuse 24
Fuse 26
Fuse 37
Fuse 38.

F37 and F38 will probably only have power when the rear window demister is on

F26 is your PAM, could be related to your PAM fault

F24 has no function

F23 is the DEM. Is your XC90 an AWD or front wheel drive model. Is a DEM fitted? Does it communicate on the CAN bus?

F20 - this wasn't part of your original fault description so I didn't include it. Look in the owner's manual to see what it is.

At any rate, connect VIDA and activate and test every device fed by these fuses. You will narrow down the problem much faster than just using a multimeter.

[spokoluzik]

Originally Posted by mottm

Hello,
When the engine is running, I do not get any volt readings through:
Fuse 20
Fuse 23
Fuse 24
Fuse 26
Fuse 37
Fuse 38.

Faulty rem. I can either repair yours or transfer software to second hand unit.
Regards
Lukas