If the error codes 10665 “Battery monitor faulty”, 24015 “ABS power supply faulty” and 37840 “Airbag power supply faulty” are read out on one of the above vehicle models, this may be associated with a previous battery change. When a battery has been changed it is necessary to register the new one with the power management system. If this is omitted, the control unit will continue to use its record of the charging characteristics of the old battery. If any irregularities are detected, the electronic control unit will disable a number of the comfort functions in order to maintain the vehicle’s ability to start. In such cases the battery needs to be checked, charged or replaced, and when this has been done you should register it in the control unit. This automatically stores the kilometrage and clears and reinitializes various other measurements, such as the battery charge status, current, voltage and temperature.
You will find this function in mega macs as follows:
Vehicle Selection ‑> Diagnostics ‑> Coding ‑> “Battery Registration”.
Then clear the errors from the appropriate control unit.
Please do this by following the disassembly and reassembly instructions from the vehicle manufacturer.
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.
Not helpful at all
Very helpful