Just wrapped up an interesting job cloning a climate control unit from an Audi A3 (2014, fits 2012-2020 models) and wanted to share the process using the Xhorse Multi-Prog Programmer. This is a great alternative for those without access to expensive tools like ODIS online, and it’s perfect for recycling spare parts from damaged vehicles. Here’s how it went down:
The Job
The goal was to back up the data from an Audi A3 climate control unit (part number noted in the video) with an Infineon XC2286M-72 MCU. Recycling these units is key—why toss perfectly good parts from a wrecked car when they can be reused? Plus, new units cost €400-600, while used ones can be found on eBay for €70-80!
Tools and Challenges
- VVDI Multi-Prog: Successfully read the entire chip for a full backup. It took about 20-30 minutes, but the process was stable and reliable.
- Microscope: Essential for this job. Soldering without one is a gamble. I used 0.1mm copper wires for precision.
- Soldering Setup: Some connections were soldered directly on the MCU (pins 6, 10, and three legs on the chip), while others were done on the PCB (capacitor, reset). The Multi-Prog software provides clear diagrams—just follow them carefully.
Process
- Prep: Soldered the necessary connections using a microscope for accuracy. The board’s multi-layer design means some pins must be soldered directly on the chip.
- Reading: Used Xhorse Multi-Prog to read the entire chip (576KB). The process is slow but thorough, ensuring a complete backup.
- Verification: The tool automatically verifies the data by performing a second read and comparing it. My read was spot-on, with only a ~1-second difference.
- Outcome: A perfect backup ready for cloning or swapping data. No online connection needed—just plug, read, and copy.
Why This Matters
- Cost Savings: Avoid pricey new parts or aftermarket units that often fail (90% non-functional in my experience).
- Sustainability: Recycling spare parts reduces waste and keeps older cars (10+ years) running.
- Accessibility: You don’t need fancy online tools. With skills, a good programmer like Multi-Prog, and a microscope, this is a straightforward job.
Tips
- Microscope is Non-Negotiable: Don’t attempt this without one—you’ll risk bad connections.
- Practice First: If you’re new, practice soldering on a spare board to build confidence.
- Double-Check Connections: Follow the Multi Prog MCU Adapter diagram and verify twice to avoid errors.
Credits to @YOYO Diagnostic!
