BMW X5 Forum (G05) - View Single Post - How to VO Code auto Lane Change Assistant (SWA)

Andy3661 · 06-29-2021, 05:47 PM

Quote:

Originally Posted by zazzau

Quote:

Originally Posted by Andy3661

Quote:

Originally Posted by ifr

This guide is specifically focused on VO Coding auto Lane Change Assistant, but will work for any VO Coding.

Note: the FA will not be saved to the car, which mitigates some risk of dealer warranty issues. The trade off is that the process will need to be repeated after each i-step upgrade that modifies HU_MGU, SAS and/or BDC.

Pre-reqs
- Windows PC - I use Windows 10 x64 VM on macOS VMware Fusion
- OBD-II to Ethernet cable
- E-Sys 3.27.1 or later - I use 3.36.2
- psdzdata - currently at 03/2021.57. You need a version that supports at least the same or newer than your car's i-step version.

Coding Steps for auto Lane Change Assistant (SWA)

Connect OBD2 cable to car
Start E-Sys
Start Car Diagnostic Mode (3 quick presses of the ignition button). Diag mode is preferred, but you need to be aware of your battery health and level of charge. Ideally connect a battery charger or voltage regulator.
Plug OBD2 cable into Ethernet Port and wait a few seconds
Switch to Expert Mode-Coding in E-sys
Click on the Connect Icon
Target Selector: choose the i-step that most closely matches your car version e.g. S18A_21_03_557. Under Interface, select 'Connection by VIN' If your VIN is not listed you have an issue. Usually wait longer, or check the PC network card is set to use TCP/IP 4 DHCP (not static), or cable not working, etc. Do not select *_DIRECT
Hit Connect button
Under 'Vehicle Order' click on Read
Under 'SVT Actual', click on Read (ECU)
If it's the first time you have coded, right-click on ECU under the SVT tree and choose 'Read Coding Data'. Use Windows File Explorer to backup your CAF directory which by default is C:\Data\CAF
Save your FA and SVT
Under Editors and Viewers - select 'FA Editor' and load your saved FA
Click on SALAPA-Element find and remove 8TR from the list. Click on Apply Changes
Click on File-Save As Give it a name such as FA_032021557_no8TR
Switch back to Expert Mode-Coding Load the FA you just created with no 8TR and do Read (ECU) again.
Select the following 3 ECU's in the SVT pane. Note these may vary by model:
1. BDC_BODY\CAFD_*7083*
2. HU_MGU\CAFD_*3E52*
3. SAS3\CAFD_*42C1*
With the 3 x ECU selected, click on Code (not Code Default Values)
Check the report is Green for all 3 ECU. Warnings are OK, but the text should be Green
Done!! Go into i-drive Car-Settings-Driver Assistance-Steering Assistant and make sure 'Lane Change Assistant' is ticked

Enjoy!

If you find the lane changes are slower than you would like, almost hesitant, then there is a fix for that, but it requires FDL coding and is not covered here.

Hi

Thanks for this. When I get to the SALAPA-Element it's empty?

Yes you have to activate FA first. It is not included in the instruction (so perhaps OP can modify the instruction.)

Oh! And I didn't get any options after clicking on the drop-down to select I-step. So I continued without selecting an I-step. I was able to code a bunch of stuff without any issues. As for the DHCP, I am running a Windows VM on MacOS, so I set static IP on MacOS and I placed the VM in bridged mode. Hopefully this helps others.

Thanks. I activated the FA but the SALAPA-Element is still empty, I don't understand what I'm doing wrong.