eGolf Battery Repair

[thecrave]

I'm trying to repair my 2016 eGolf. After attempting to run an output test (ENG1311-Cell-Controller_Numbering) in module 8C using VCDS, I received a red triangle with bang, and error, "Error: Electrical system. Stop!" While the car powers on, it will not drive. Everything was fine with it prior to this action, I was simply curious for more info. Prior to this, the vehicle was operating just fine.

I ended up taking it to the dealer having exhausted options for resetting. Details on my saga are here:
https://forums.ross-tech.com/index.php?threads/46022/

Current situation - I took it to the dealer hoping they could do some sort of guided adaptation, etc., but no luck. They stated they have done remote diagnostics with VW techs using ODIS and they've proposed a repair to "Cell Circuit 'C'" which involves dropping the entire battery pack from the car, opening it and replacing three cells - one 5QE-915-599-AH and two 5QE-915-599-AK cells.

Parts and labor is just shy of $9,000.
Vehicle is worth ~$12,000.
I don't have a garage or nearby shop to do the work myself (I'm in Northern California).

After seeing some of the projects here with VW / eGolf HV batteries (amazing!!), I'm curious if anyone here has seen this error via CAN and if there's a way to "wake up" or "repair" the cells over the CAN bus from the ODB port? I love this vehicle and it seems crazy to do all this for what presumably was a hiccup in a BCM.

Here's a VCDS scan - note BCM 3, 5, 7 errors.

Code: Select all

Address 8C: HV Battery (J840)       Labels: 5QE-915-227.clb
   Part No SW: 5QE 915 227 M    HW: 5QE 915 227 H
   Component: K8C           H13 0722 
   Coding: 000000000000000000000000000000000000000000000000000000000000
   Shop #: WSC 00000 000 00000
   ASAM Dataset: EV_BECM08820215QE915227M 003016
   ROD: EV_BECM08820215QE915227H.rod
   VCID: 52A06100052D66062D-XXXX

5 Faults Found:
23264 - Internal Control Module
          P060C 00 [01100101] - Main Processor Performance
          Not Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Priority: 1
                    Fault Frequency: 1
                    Mileage: 38575 km
                    Date: 2024.11.01
                    Time: 15:54:54

                    Unlearning counter according OBD: 40
                    Current of H-V / hybrid battery: 0.000 A

18413 - Internal Temperature Measurement
          U1409 00 [00100100] - Implausible Signal
          Intermittent - Not Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Priority: 2
                    Fault Frequency: 1
                    Mileage: 38575 km
                    Date: 2024.11.01
                    Time: 15:58:40

                    Unlearning counter according OBD: 40
                    Current of H-V / hybrid battery: 0.000 A
                    Battery temperature: 14.234 °C

18376 - Battery Control Module 3
          U01A2 00 [00100111] - No Communications
          Not Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Priority: 2
                    Fault Frequency: 2
                    Mileage: 38575 km
                    Date: 2024.11.01
                    Time: 15:54:54

                    Unlearning counter according OBD: 40
                    Current of H-V / hybrid battery: 0.000 A

18386 - Battery Control Module 5
          U01A4 00 [00100111] - No Communications
          Not Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Priority: 2
                    Fault Frequency: 2
                    Mileage: 38575 km
                    Date: 2024.11.01
                    Time: 15:54:54

                    Unlearning counter according OBD: 40
                    Current of H-V / hybrid battery: 0.000 A

18394 - Battery Control Module 7
          U01A6 00 [00100111] - No Communications
          Not Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Priority: 2
                    Fault Frequency: 2
                    Mileage: 38575 km
                    Date: 2024.11.01
                    Time: 15:54:54

                    Unlearning counter according OBD: 40
                    Current of H-V / hybrid battery: 0.000 A