CANbus also called decoder, it usually used to solve boot( it will generate an ACC), steering wheel control, reversing radar display, display of the original car, etc.
A car with CANbus will not have a separate ACC line, small light line, and other lines. But the driving computer of the car communicates with the car stereo CANbus through two data lines (CAN line), and then CANbus decodes the corresponding signal to the car stereo. For example, when reversing, CANBUS will decode a reverse signal (12V voltage) to the REVERSE line of the car stereo, and the car stereo will automatically switch to the reverse interface. And also, when the car's instrument light switch is turned on, CANbus will decode a button light signal (12V voltage) to the car stereo's ILLUMI line, and the machine's button light will light up.
- ISO wiring harness with canbus.png (1.1 MiB) Viewed 17896 times
A side is to connect with the car stereo, B side is to connect with the car, C is standard for CANbus.
The REVERSE line and ILLUMI line on the CANbus ISO wiring harness is directly produced by CANbus. They will not be labeled, but the line position of the A end is the same as the . So if we want to find these lines, we can compare the line position of the universal ones.