MTU 12V 4000 L32 F Operating Instructions Manual page 121

1.4550.143 – B - CAN Fault (CAN Bus Off, CAN Ad)
Red alarm. Initiated by throttle flap B-Bank.
Cause
CAN bus connection faulty.
1.4550.144 – B - CAN Stop Command
Yellow alarm. Initiated by throttle flap B-Bank.
Cause
"Stop" input signal received via
CAN bus.
Corrective action
1. Check cabling (→ Page 201).
2. Check throttle flap settings.
Corrective action
u Check throttle flap settings.
MS150104/02E 2016-11 | Troubleshooting | 121