MTU 12V4000M73 series Operating Instructions Manual page 152

371 – AL Wiring TO 1
Cause
Short circuit or wire break on
transistor output 1 (TO 1).
372 – AL Wiring TO 2
Cause
Short circuit or wire break on
transistor output 2 (TO 2).
373 – AL Wiring TO 3
Cause
Short circuit or wire break on
transistor output 3 (TO 3).
374 – AL Wiring TO 4
Cause
Short circuit or wire break on
transistor output 4 (TO 4).
390 – AL MCR exceeded
Cause
DBR/MCR feature: MCR
(maximum continuous rating) was
exceeded.
396 – TD T-Coolant
Cause
Maximum deviation of coolant
temperature values from sensors
150 | Troubleshooting | MS150045/03E 2018-08
ZKP-Number: 1.8004.634
Corrective action
1. Check charger valve/cabling, repair as necessary.
2. Replace engine governor
ZKP-Number: 1.8004.635
Corrective action
1. Check air recirculation valve/cabling, repair as necessary.
2. Replace engine governor
ZKP-Number: 1.8004.636
Corrective action
u Check wiring of charger valve 2 (marine engine)
ZKP-Number: 1.8004.637
Corrective action
u Check wiring of charger valve 3 (marine engine)
ZKP-Number: 1.1085.009
Corrective action
1. If the alarm occurs temporarily, no action required.
2. If the alarm is permanently active, contact Service.
ZKP-Number: 1.8004.626
Corrective action
1. Check sensor and cabling, replace as necessary.
2. Contact Service.