MTU 12V4000M73 series Operating Instructions Manual page 156

501 – AL Wiring POM Starter 2
Cause
A wiring fault was detected in the
connection between starter 2 and
POM. This may be a missing
consumer, a wire break, or a short
circuit.
502 – AL Open Load POM Alternator
Cause
Open load was detected at the
connection of the battery-
charging generator on the POM.
503 – AL Battery not Charging
Cause
The battery-charging generator
does not charge the battery.
504 – AL CAN POM node Lost
Cause
POM missing on CAN bus.
506 – AL Low Starter Voltage
Cause
battery voltage is too low to
accomplish a starting procedure.
507 – AL POM Error
Cause
A general POM error occurred.
154 | Troubleshooting | MS150045/03E 2018-08
ZKP-Number: 1.4500.901
Corrective action
u Check connection between POM and starter.
ZKP-Number: 1.4500.902
Corrective action
u Check connection between POM and starter.
ZKP-Number: 1.4500.903
Corrective action
u Check battery-charging generator and cabling.
ZKP-Number: 1.4500.904
Corrective action
u Check connection and POM. If alarm occurs in combination with
alarm 508, the resistor in the POM cabling is missing.
ZKP-Number: 1.4500.906
Corrective action
u Check battery-charging generator and cabling.
ZKP-Number: 1.4500.907
Corrective action
u Replace POM.