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1505 – AL_dosing_unit_defect_DU6
Cause
Supply unit / dosing unit 6
(M80.2X1, flow 3) of the SCR
system has signaled an internal
fault via component CAN bus 5.
1506 – AL_heater_cartridge_defect_SU6
Cause
The heating cartridge power
supply or the heating cartridge in
supply unit M80.2X3 is faulty.
1507 – AL Flap Intake Air B Defect
Cause
Thermal management flap 2
(M58.2) is faulty.
1508 – AL Act Intake Air B Ref-Drv EngStop
Cause
This alarm is set in the fault
memory if homing of thermal
management flap 2 (M58.2) was
not successful when initiated with
the engine at standstill.
1509 – AL Act Intake B Ref-Drv Eng Running
Cause
Homing of thermal management
flap 2 (M58.2) could not be
executed owing to low battery
voltage or was unsuccessful for
some other reason.
1510 – AL Flap Intakeair B Wear Limit 1
Cause
The turning range on homing
thermal management flap 2
(M58.2) has violated limit value 1.
The flap mechanism is beginning
to wear.
174 | Troubleshooting | MS15065/01E 2019-01
Corrective action
u Contact Service.
Corrective action
1. Check component(s) and wiring, replace as necessary.
2. Contact Service.
Corrective action
u Contact Service.
Corrective action
1. Check state of charge of batteries (plant side).
2. Check plug connections to Engine Control Unit (→ Page 323).
3. Contact Service.
Corrective action
1. Check engine cabling (→ Page 321).
2. Contact Service.
Corrective action
u Contact Service.
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