Electrical error on CAN-bus 3 (CAN3 BusOff)
شرح
The DTC is set to active if CAN controller of CAN-bus 3 is in the state bus-off. The DTC is set to inactive if the CAN-controller is not in state bus-off for 1100 ms. The DTC is not validated (stored) if: • the ignition is turned off • first 2 seconds after ignition on • the supply voltage is below 22 volt • the supply voltage is above 32 volt
علت
• Defect wiring of CAN-bus 3: - CAN-high interrupted - CAN-low interrupted - CAN-high and CAN-low interrupted at the same location - Loss of connection to termination network - short circuit between CAN-high and CAN low. - short circuit between CAN-high and supply voltage. - short circuit between CAN-high and ground. - short circuit between CAN-low and supply voltage. - short circuit between CAN-low and ground. • Defect ECU on CAN-bus. • ECU on CAN-bus communicates with 250 kb/s. • These causes might not be detectable by the CAN controller. Instead timouts will occur for involved ECUs.
