MTU 12 V 4000 G73 Operating Instructions Manual page 78

421 – L2 Aux 1
Cause
Alarm configuration limit value
1; Input signal of Aux 1 has
exceeded/not attained limit
value 2, depending on
configuration.
428 – L1 T-Aux 1
Preliminary warning
Cause
Alarm configuration limit value
1; Temperature signal of Aux 1
has exceeded / not attained
limit value 1, depending on
configuration.
440 – L1 P-Aux 1
Preliminary warning
Cause
Alarm configuration limit value
1; Pressure signal of Aux 1 has
exceeded / not attained limit
value 1, depending on
configuration.
442 – L2 P-Aux 1
Preliminary warning
Cause
Alarm configuration limit value
2; Pressure signal of Aux 1 has
exceeded / not attained limit
value 2, depending on
configuration.
444 – SD U-PDU
Cause
SD alarm configuration; Injector
power stage sensor defect;
internal error of the ECU7.
78 | Troubleshooting | MS150029/02E 2013-03
ZKP-Number: 2.0160.922
Corrective action
u Determine cause of limit value violation and rectify fault.
ZKP-Number: 2.0130.921
Corrective action
u Determine cause of limit value violation and rectify fault.
ZKP-Number: 2.0110.921
Corrective action
u Determine cause of limit value violation and rectify fault.
ZKP-Number: 2.0110.931
Corrective action
u Determine cause of limit value violation and rectify fault.
ZKP-Number: 1.8004.578
Corrective action
u Replace ADEC (ECU 7).