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DTC › DCU3 DCU3 / 020B

Not impl: Absence of brown CAN bus communication (CAN1 buffer overflow)

â–¶ How to fix

Trouble shoot CAN bus cable harness and connectors.

What you'll see

Systems that communicate on the brown CAN often have major function disturbances.

System reaction

Functions dependent on information from brown CAN bus are degraded or disabled. #TBChecked: - An amber BNS malfunction warning will be shown in the ICL - A yellow/red Door malfunction warning will be shown in the ICL

Diagnostic depth

Detection

Communication error. Brown CAN-bus buffer overflow. The brown CAN-bus has an open circuit. Too many recieve and transmit errors has occured.

Possible cause

• Defect wiring of brown CAN-bus: - 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 unit(s) on the brown CAN-bus.

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