Open load on emergency reset valve B output
Check the component, cable harness and connectors for mechanical damage. If the resistance measured over the valve's solenoid coil (when disconnected from the DCU) is higher than approximately 200 kohm the DCU will not detect that it is connected, thus there is open load. It is possible to reset manually by pushing the reset button on the valve itself.
What you'll see
The DCU is unable to reset the emergency opening valve and the door leaf or whole door stays in emergency opened state.
System reaction
The DCU signals 'Major fault' over CAN to MBS, which then requests 'Door malfunction' notification and an exclamation mark indication in the related door in Bus stop page in ICL.
Diagnostic depth
A current below normal operating level has been detected on the output for the valve.
- Open circuit due to damaged or broken wires. - A connector for the valve is unplugged. - The connected component is out of order.