Short circuit on door motor brake 2 output
Check the brake, cable harness and connectors for mechanical damage. If the resistance measured over the coil of the brake component (when disconnected from the DCU) is lower than approximately 12 ohms it will cause overcurrent.
What you'll see
The door leaf cannot be opened by the DCU, nor by hand (unless emergency opened): this indicates there is a short circuit to ground and the brake is thus constantly applied. The door leaf may appear to function normally even though this DTC is set: this indicates there is a short circuit to supply.
System reaction
The DCU signals 'Major fault' over CAN to MBS, which then requests 'Door malfunction' notification and exclamation mark indication in the related door in Bus stop page in ICL.
Diagnostic depth
A current above the maximum level has been detected on the high-side output for the brake, or the output has come in contact with supply voltage. The output can supply maximum 2 A.
- Short circuit due to damaged or broken wires. - The connected component is out of order.