When soldering the Audi A4 transmission computer board, the main reason why solder wire cannot be used is due to the materials of the original solder joints.
If soldering is necessary, using solder wire is feasible, but additional rosin flux should be added to assist with the soldering.
If pressure welding is adopted, ultrasonic spot welding is usually used.
It should be noted that the connection wires of the transmission computer board are usually made of aluminum or nickel-plated wire, so only acidic flux can be used for soldering, which is obtained by dissolving zinc in hydrochloric acid.
For issues related to the Audi A4 transmission computer board, it is advisable to consult professionals who specialize in such repairs.
In the past, there have been cases where some repairers repaired the transmission computer at home, and this repair work is relatively straightforward, but the computer is located inside the transmission, and long-term high temperatures may cause aging, although it can be repaired.
We recommend choosing convenience stores for repairs, as they tend to be reasonably priced and typically offer a three-year warranty.
Regarding the Audi A4 transmission controller, the model is 12912, and specific prices vary by model.
If there is a fault where the engine transmission control module has no signal, it may be due to oxidized connectors causing communication failures.
For older vehicles, the transmission computer may be oxidized by water, while newer vehicles are less prone to this. Therefore, focus on checking whether the connectors are oxidized or loose.
I hope these inspection ideas can be helpful. If your car has problems, please consult a professional technician, who can usually resolve the issue in 10 minutes.
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