MTU 20V4000Lx2x Operating Instructions Manual page 106

187 – AL CAN1 Error Passive
Yellow alarm.
Associated parameter 2.0500.687
Cause
CAN controller 1 has indicated a
warning. Bus users (ECU, SAM or
EMU) are faulty.
188 – AL CAN2 Bus Off
Yellow alarm.
Associated parameter 2.0500.688
Cause
CAN controller 2 is in "Bus Off"
status. Automatic switching to
CAN bus 1. Bus users (ECU, SAM
or EMU) faulty.
189 – AL CAN2 Error Passive
Yellow alarm.
Associated parameter 2.0500.689
Cause
CAN controller 2 has indicated a
warning. Possible causes may be,
e.g. missing node, minor
malfunctions or temporary bus
overload.
190 – AL EMU Parameter Not Supported
Red alarm.
Associated parameter 2.0500.690
Cause
EMU parameters are not
supported.
201 – SD T-Coolant
Red alarm. Engine shutdown.
Associated parameter 1.8004.570
Cause
Coolant temperature sensor at
engine outlet defective, short
circuit or wire break.
106 | Troubleshooting | MS150122/00E 2015-07
Corrective action
u Check operation of bus stations and cabling.
Corrective action
u Check operation of bus stations and cabling.
Corrective action
u Check operation of bus stations and cabling.
Corrective action
u Contact Service (configuration fault).
Corrective action
u Check sensor and cabling (B6.1), replace as necessary. Fault is
rectified following engine restart.