MTU 8V2000M40A Operating Instructions Manual page 124

Fault
code
118
119
120
121
122
134
136
137
138
139
140
142
144
145
146
147
148
149
150
151
124 | Troubleshooting | MS150031/06E 2016-010
Alarm text Meaning
L1 SUPPLY VOLT. Supply voltage too low (1st lim-
LOW it)
L2 SUPPLY VOLT. Supply voltage too low (2nd
LOW limit)
L1 SUPPLY VOLT. Supply voltage too high (1st
HIGH limit)
L2 SUPPLY VOLT. Supply voltage too high (2nd
HIGH limit)
automatic engine shutdown
(depending on project design)
L1 T-ELECTRONIC Temperature in ECU housing
too high (1st limit)
15V POS ECU DE- Electronic equipment defective;
FECT automatic engine shutdown
15V NEG ECU DE- Electronic equipment defective;
FECT automatic engine shutdown
L1 5V BUFFER Power supply for pressure sen-
TEST sors defective.
SENSORPOWER- Power supply for pressure sen-
DEFECT sors defective.
L1 TE BUFFER Internal electronic fault (tem-
TEST perature sensors)
TE BUF. ECU DE- Internal electronic fault (tem-
FECT perature sensors)
BANK1 ECU DE- Internal electronic fault;
FECT Engine does not start
BANK2 ECU DE- Internal electronic fault;
FECT Engine does not start
15V_GOOD ECU Electronic equipment defective;
DEFECT automatic engine shutdown
L1 AD-TEST1 SUP- A/D-converter supply voltage
PLY too low
AD-TEST1 ECU Electronic equipment defective;
DEFECT automatic engine shutdown
L1 AD-TEST2 SUP- A/D-converter supply voltage
PLY too low
AD-TEST2 ECU Electronic equipment defective;
DEFECT automatic engine shutdown
L1 AD-TEST3 SUP- A/D-converter supply voltage
PLY too low
AD-TEST3 ECU Electronic equipment defective;
DEFECT automatic engine shutdown
Task
Check ECU supply voltage.
Check ECU supply voltage.
Check ECU supply voltage.
Check ECU supply voltage.
If engine was stopped: Start engine
(→ Page 114).
1. Improve engine room ventilation.
2. Reduce engine power.
Contact Service.
Contact Service.
1. Disconnect connectors X2 and X3 from
ECU. If alarm does not disappear: Con-
tact Service.
2. Check wiring (pressure sensors).
3. Contact Service.
1. Disconnect connectors X2 and X3 from
ECU. If alarm does not disappear: Con-
tact Service.
2. Check wiring (pressure sensors).
3. Contact Service.
Contact Service.
Contact Service.
Contact Service.
Contact Service.
Contact Service.
Contact Service.
Contact Service.
Contact Service.
Contact Service.
Contact Service.
Contact Service.