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What is the Proxy Alignment Procedure?

Model: (Various brands) Various
Part: Onboard computer

When a warning light comes on or there is an issue with a control unit, you often hear about the CAN BUS (Controller Area Network): this is a communication protocol used by the car's control units to communicate with each other and recognise themselves through two lines (Can H and Can L); to avoid interference, these two lines are twisted together: therefore, when observing a wiring harness, the twisted pairs of wires are those of the Can line. That said, whenever you replace a control unit or an accessory such as the radio, it is necessary to perform the proxy alignment, which is the procedure for updating the new configuration of the network.

Updated on 28 February 2026 by ScegliAuto

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