Troubleshooting The D-Bus: Notes

The failure of communication with one or several control units via the D-bus can be caused by:

• Failure of the D-bus cable or its individual connections.
• Failure of the IKE/KOMBI control unit.
• Failure of the I/K or P-bus or its individual connections.
• Failure of the voltage supply or ground to individual modules.
• Interference in the D-bus cable.