CAN-bus not operative
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If the body CAN or powertrain CAN data bus is not working, there may be a short circuit or open circuit on the CAN Low/CAN High line. Alternatively, a control unit might be faulty.
The following procedure is recommended to localize the cause of the fault:
- Disconnect the bus users from the CAN bus one after the other until the cause of the fault (control unit X) is found.
- Check the lines of control unit X for a short/open circuit.
- If possible, check control unit X itself.
- However, this procedure only leads to success if a tap line from a control unit to the CAN bus has a short circuit. If a line in the CAN bus itself has a short circuit, the wiring harness must be checked.
We can assume no liability for printing errors or inaccuracies in this information and reserve the right to introduce technical modifications at any time.