Electrical error on SubCAN bus (CAN2 BusOff)
• Check connector for SubCAN bus on ACS (pin C11 and C12). • Check wiring for SubCAN bus: - Measure the resistance (with the battery disconnected) between CAN-high (pin C11) and CAN-low (pin C12). It should be close to 60 ohm (one 120 ohm termination resistor in each end of the CAN bus). - Measure the resistance (with the battery disconnected) between CAN-high on ACS (pin C11) and CAN-high on the ACSX unit. It should be close to zero ohm. - Measure the resistance (with the battery disconnected) between CAN-low on ACS (pin C12) and CAN-low on the ACSX unit. It should be close to zero ohm. • Check wiring and connector for the ignition signal (pin A11) on the ACS.
What you'll see
Articulation damping will have reduced functionality.
System reaction
Amber ACS warning lamp Speed Limitation
Diagnostic depth
The CAN-controller of the SubCAN bus has entered state bus-off, which indicates a communication error. There is a short circuit on the SubCAN bus, or the ACSX is not alive.
• Defect connectors on ACS for SubCAN bus (pin A9 or A12). • Defect wiring for CAN bus, open circuit on CAN-high (pin C11) or CAN-low (pin C12). • Ignition signal (pin A11) on ACS is short circuit to supply.