Fault code
No.
Designation
Meaning
Task
Related
parameter
No.
121
HIHI ECU Power Sup‐
ply Voltage
Supply voltage too high
(2nd limit value); automatic
engine shutdown (configu‐
rable).
Check ECU supply
voltage.
Contact Service.
2.0140.93
2
122
HI T-ECU
Temperature in ECU hous‐
ing too high (1st limit value).
1. Improve engine
room ventilation.
2. Reduce power.
2.0132.92
1
134
15V POS ECU DE‐
FECT
Internal voltage (-15 VDC)
faulty; automatic engine
shutdown.
Replace engine
governor.
136
15V NEG ECU DE‐
FECT
Internal voltage (-15 VDC)
missing; automatic engine
shutdown.
Contact Service.
139
L1 TE BUFFER TEST
Supply voltage of tempera‐
ture sensors faulty.
Contact Service.
Check sensors;
Replace engine
governor.
140
TE BUF. ECU DEFECT
Supply voltage of tempera‐
ture sensors faulty.
Contact Service.
Check sensors;
Replace engine
governor.
142
BANK1 ECU DEFECT
Power output stage for con‐
trol of the solenoid valves
on bank 1 is faulty; Engine
does not start.
Replace engine
governor.
144
BANK2 ECU DEFECT
Power output stage for con‐
trol of the solenoid valves
on bank 2 is faulty; Engine
does not start.
Replace engine
governor.
145
15V_GOOD ECU DE‐
FECT
Power supply faulty; auto‐
matic engine shutdown.
Replace engine
governor.
146
L1 AD-TEST1 SUPPLY
Supply voltage A/D convert‐
er too low.
Replace engine
governor.
147
AD-TEST1 ECU DE‐
FECT
Electronic fault; automatic
engine shutdown.
Replace engine
governor.
148
L1 AD-TEST2 SUPPLY
Supply voltage A/D convert‐
er too low.
Replace engine
governor.
149
AD-TEST2 ECU DE‐
FECT
Internal electronic fault; au‐
tomatic engine shutdown.
Replace engine
governor.
150
L1 AD-TEST3 SUPPLY
Internal electronic fault; au‐
tomatic engine shutdown.
Replace engine
governor.
151
AD-TEST3 ECU DE‐
FECT
Internal electronic fault; au‐
tomatic engine shutdown.
Replace engine
governor.
176
AL LifeData not availa‐
ble
Alarm configuration; No (ap‐
propriate) LifeData backup
system available, ECU re‐
set after expiration of time-
out period.
Contact Service.
2.4000.00
4
48 | Troubleshooting | MS150054/02E 2012-02
TIM-ID: 0000016865 - 001