All models with multi-function
control unit
If a customer complains about the above problem, this could be caused by moisture. Leaks may occur in the upper right area of the windshield (connection to body). This results in water penetrating into the front footwell. The water penetrates into the main cable harness (near the bulkhead) and into the multi-function control unit through the, causing the above-mentioned complaint. If this is the case, the glass pane must be sealed. In addition, the cable harness must be dried and checked for possible damages (corrosion). Thereafter, the control unit's plug connection must be checked and cleaned if necessary. If this does not resolve the complaint, the control unit must be replaced.
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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