06-19-2020, 02:24 PM
I had the very same issu with my Golf 5. The workaround with cutting the red wire on the CANbus decoder did not work for me. The car always had a quiescent current of 0.6 A, when CANbus decoder was connected.
The reason for this problem was my CANbus-Gateway. Older VAG-cars (<2007) often have a faulty softwareversion installed on their gateways, which prevents CAN from switching to bus rest. This problem even affects original radios from VW, so this is no promblem of Joying radios.
You can either change the gateway to a newer version (they don't cost that much) or you can update software of your current gateway. Unfortunatey, you need a specific diagnostic interface for both solutions.
I did update my gateway to the newest version (I own the interface) and the problem was fixed since them. No battery drain any more.
The reason for this problem was my CANbus-Gateway. Older VAG-cars (<2007) often have a faulty softwareversion installed on their gateways, which prevents CAN from switching to bus rest. This problem even affects original radios from VW, so this is no promblem of Joying radios.
You can either change the gateway to a newer version (they don't cost that much) or you can update software of your current gateway. Unfortunatey, you need a specific diagnostic interface for both solutions.
I did update my gateway to the newest version (I own the interface) and the problem was fixed since them. No battery drain any more.