A faulty alternator controller may cause sporadic failures of the radio display in the above vehicles. Furthermore, the engine may enter the emergency mode.
This is often accompanied by the following error codes:
Body Control Module (BCM): B1517 (battery voltage)
Engine control unit: P0621 (alternator failure)
P0622 (alternator failure)
To remedy this, a modified alternator controller (93744610) should be installed.
Modified controller have already been used in production from the following VINs:
W0LLA63F870094862 – for engine code Z20DM/Z20DMH
W0LLA63F170151709 – for engine code Z24XE
W0LLA63F370094865 – for engine code Z32SE
Note: Delete the fault memory after the repair.
Important safety note
Technical information and practical tips have been compiled by HELLA in order to provide professional support to vehicle workshops in their day-to-day work. The information provided on this website is intended for use by suitably qualified personnel only.
Reprinting, distribution, reproduction, exploitation in any form or disclosure of the contents of this document, even in part, is prohibited without our express, written approval and indication of the source. The schematic illustrations, pictures and descriptions serve only for the purposes of explanation and representation of the instructions and cannot be used as a basis for installation or assembly work. All rights reserved.
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