Scania fault code 543

COO Coordinator Downhill speed control The voltage in the downhill speed control switch has been below the permitted level. Read explanation → MBS #Not implemented. Absence of CAN bus 3 communication The fault is validated as present if the ECU does not detect communication on CAN bus 3 within the timeout period Read explanation → CUV Visibility system Switch for main lighting Incorrect or missing communication with switch for main lighting. Read explanation → BCI Configuration fault, Expansion unit B The expansion unit is responding, but does not exist according to the vehicle configuration. Read explanation →