Xc90 anti skid fault.

[drumagoo]

Hi again tested again today cleared all codes
Then read codes and got
0094 com probs with activ on demand couplings.
1a54 om rem signal missing
1a64 com with DEM signal missing
0004 tyre preasure siren com fault.
4f43 parking sensor 2 faulty

Then i unplugged dem cleared codes and read again and got
0094
1a64
0004
4f43
Need hrlp in where to look nxt thanks.

[colinbos]

Originally Posted by SwissXC90

Unplug the DEM connector (the diff control module, under the car)


If the DEM is causing trouble, remove and get it refurbished.
Put a plastic bag zip tied over the DEM loom connector to keep it clean and dry while the DEM is out of the vehicle.

Thats whats next.....as Swiss says......

[colinbos]

using

http://www.bba-reman.com/gb/index.aspx

or https://volvodiagnostic.com/shop/ind...duct&id_lang=1

[drumagoo]

Hi thanks thats where im at last post is codes after i unpluged dem.

[SwissXC90]

Your DEM is obviously faulty.
Get it rebuild/repaired using one of the company's provided in the links from colinbos

[byrlord]

Dear members, I have the following codes after running diagnostics in Vida:

- BCM 0094, Communication between control units Communication problems with DEM
- CEM 1A64, Communication with AOC control module Signal missing
- REM DD10 LIN communication, communication fault (Front rear park assist does not work)

I have done the following so far:

- My SAS was replaced last year by Volvo
- Changed oil and filter at the HALDEX
- Checked HALDEX pump and works
- The HALDEX module looks clean, no corrosion
- Checked Yaw sensor and it looks nice and clean, no corrosion
- Fuses are ok

I am open to WHAT is NEXT to CHECK suggestions, I would appreciate some help.

Thanks in advance!

[SwissXC90]

I'm guessing a CAN bus problem

Monitor the CAN bus signals with a scope to check the electrical waveform

If you see any irregularities, unplug units one by one until you find the one causing the problem.

This will take time, and experience helps a lot.

[spokoluzik]

Originally Posted by byrlord

Dear members, I have the following codes after running diagnostics in Vida:

- BCM 0094, Communication between control units Communication problems with DEM
- CEM 1A64, Communication with AOC control module Signal missing
- REM DD10 LIN communication, communication fault (Front rear park assist does not work)

I have done the following so far:

- My SAS was replaced last year by Volvo
- Changed oil and filter at the HALDEX
- Checked HALDEX pump and works
- The HALDEX module looks clean, no corrosion
- Checked Yaw sensor and it looks nice and clean, no corrosion
- Fuses are ok

I am open to WHAT is NEXT to CHECK suggestions, I would appreciate some help.

Thanks in advance!

Most likely your rem is faulty. Check power to fuse 23.