How to solve Xhorse VVDI Prog Benz 204 front Sam module write error (00)?

Encountering a write error while programming a Mercedes-Benz W204 Front SAM module with VVDI Prog?

The detailed problem:

Hello have issue with VVDI PROG
Benz 204 front Sam module
Read flash ok but on write it delete data before write
And then fails

Here is the connection diagram:

Root Cause: Missing Pad Jumpers & Connection Errors

• Unshorted Circuit Pads: The connection wiring diagrams often require specific solder pads to be short-circuited (jumped) before writing. If left unjoined, the module will allow a flash read and erase, but block incoming write commands.

Feedback:

The issue was I had not short circuit the pads

3 Quick Steps to Fix VVDI PROG/ Multi Prog Error

1. Verify the Connection Diagram: Open your VVDI Prog/Multi Prog software and double-check the specific diagram for your board revision. Ensure all designated pads are properly shorted with a clean solder bridge or jumper wire.

2. Eliminate Extension Cables: Avoid using aftermarket extension cables, adapters, or breadboards. Connect using only the original wiring harness provided with your VVDI Prog or Multi-Prog to prevent voltage drops or signal interference during the write phase.

3. Inspect Solder Joints & Power: Ensure a stable power supply is connected to your programmer and that all solder points are solid with zero wire bridging. And VVDI PROG will need extra 12V power supply if needed.

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