[Winterle]

Hallo All,

I upgraded my BMW G20 from 8.8 to 10.25 display according to this post: https://g20.bimmerpost.com/forums/sh....php?t=2013844

I did the coding with Bimmercode.

Everything worked well, except when the car went into deep sleep, the display stayed black, unless I did a reboot of the head unit (30 sec on/off button).


Today I attempted to fix this by restoring all control units by re-writing the back-up files.

After flashing the instrument cluster, it stayed black and did not display anymore anything. I also can't connect anymore to the instrument cluster with Bimmercode (it's not in the list).

Can annyone support here? I was reading online and understood I could possibliy solve this by using Esys. Is that correct?

[Winterle]

Today I installed the full version of E-Sys, I'm now waiting for the cable I ordered.

How I understand the following steps from reading forum posts:

- I need to read ECU
- Find KOMBI
- Right click > Detect CAF

If the CAFD is missing, E-Sys will suggest a CAFD file.

- Then code


Is this correct? Can anyone help me out here?

Thanks!

[1966GTO]

Way above my head ! But I did run your question through AI and it came up with the below. Maybe there is something in there that will help you if nobody else chimes in. Sorry I couldn’t help more !



STEP-BY-STEP (DKOMBI recovery)

1. Connect to the car

1. Open E-Sys
2. Click Connect
3. Select:
4. Target: G20
5. Interface: Connection via VIN (ENET)
6. Hit Connect

2. Read ECU list (SVT)

1. Go to:
2. Expert Mode → VCM
3. Click:
4. Read ECU

👉 This loads the full ECU tree
3. Check for DKOMBI

Look for:

• DKOMBI

👉 If DKOMBI IS PRESENT

This is the best-case scenario.
4A. Detect CAFD (MOST IMPORTANT STEP)

1. Go to:
2. Expert Mode → Coding
3. Click:
4. Read ECU (Coding)
5. In left panel:
6. Find DKOMBI

If it shows NO CAFD (or red/missing):

1. Right-click DKOMBI
2. Click:👉 Detect CAF for SWE
3. Select the suggested CAFD (usually only one option)
4. Click OK

5A. Code the module

After CAFD appears:

1. Right-click DKOMBI
2. Click:👉 CODE

⏳ Wait 1–2 minutes
👉 Your cluster should reboot and come back
👉 If DKOMBI IS PRESENT but HAS CAFD

Still try:

1. Right-click DKOMBI
2. Click CODE

Sometimes it’s just corrupted coding, not missing CAFD.
🚨 If DKOMBI DOES NOT SHOW UP

This is your situation most likely.
4B. Try detecting via SVT Actual

1. Go to:
2. Expert Mode → TAL Processing
3. Click:
4. Read SVT (Actual)

👉 See if DKOMBI appears here
If it appears here but NOT in coding:

You can:

• Inject CAFD using same method above

❌ If DKOMBI is completely missing everywhere

Now we escalate.
🔥 LAST RESORT (still E-Sys)


TAL Processing (reflash attempt)

This is more advanced but still doable.
1. Go to:

• Expert Mode → TAL Processing

2. Load:

• FA (vehicle order) → Read FA
• SVT Actual → Read SVT

3. Calculate TAL

• Click:👉 Calculate TAL

4. In TAL options:

Select:

• blFlash
• swDeploy
• cdDeploy
• ibaDeploy

5. Target ONLY DKOMBI

VERY IMPORTANT:

• In ECU list → select ONLY DKOMBI

6. Execute TAL

• Click:👉 Start

⏳ This will attempt to reflash the cluster firmware
⚠️ If TAL fails or DKOMBI not listed

At this point:
👉 You need ISTA+
ISTA can:

• detect dead modules better
• perform recovery flash
• reinitialize ECUs

💀 Absolute worst case

If:

• E-Sys = no DKOMBI
• ISTA = no communication

👉 The cluster is:

• soft-bricked beyond recovery
• or hardware failure

➡️ Replacement + programming required