Operating instructions

Fault code Alarm text Meaning Task
119 L2 SUPPLY VOLT.
LOW
Supply voltage too low
(2nd limit)
Check ECU supply voltage.
120 L1 SUPPLY VOLT.
HIGH
Supply voltage too high
(1st limit)
Check ECU supply voltage.
121 L2 SUPPLY VOLT.
HIGH
Supply voltage too high
(2nd limit);
Automatic engine shut‐
down (depending on
project design).
Check ECU supply voltage.
If engine was stopped: Start engine
(→ Page 35).
122 L1 T-ELECTRONIC Temperature in ECU hous‐
ing too high (1st limit)
1. Improve engine room ventila‐
tion.
2. Reduce engine power.
134 15V POS ECU DE‐
FECT
Electronic equipment de‐
fective;
Automatic engine shut‐
down.
Contact Service.
136 15V NEG ECU DE‐
FECT
Electronic equipment de‐
fective;
Automatic engine shut‐
down.
Contact Service.
137 L1 5V BUFFER
TEST
Power supply for pressure
sensors defective
1. Disconnect connectors X2 and
X3 from ECU. If alarm does not
disappear: Contact Service.
2. Check wiring (pressure sen‐
sors).
3. Contact Service.
138 SENSORPOWER‐
DEFECT
Power supply for pressure
sensors defective
1. Disconnect connectors X2 and
X3 from ECU. If alarm does not
disappear: Contact Service.
2. Check wiring (pressure sen‐
sors).
3. Contact Service.
139 L1 TE BUFFER
TEST
Internal electronic fault
(temperature sensors)
Contact Service.
140 TE BUF. ECU DE‐
FECT
Internal electronic fault
(temperature sensors)
Contact Service.
142 BANK1 ECU DE‐
FECT
Internal electronic fault;
Engine does not start
Contact Service.
144 BANK2 ECU DE‐
FECT
Internal electronic fault;
Engine does not start.
Contact Service.
145 15V_GOOD ECU
DEFECT
Electronic equipment de‐
fective;
Automatic engine shut‐
down.
Contact Service.
146 L1 AD-TEST1 SUP‐
PLY
A/D-converter supply volt‐
age too low.
Contact Service.
48 | Troubleshooting | M015675/05E 2011-10
TIM-ID: 0000003161 - 001