Modifying vehicle settings with unofficial diagnostic tools can lead to unexpected problems. This article explores a common issue encountered after using an illegal VCDS version: malfunctioning Central Electric module functions. We’ll delve into troubleshooting steps using a legitimate VCDS system, focusing on Central Electric Byte 1 Vcds adjustments for accurate diagnosis and repair.
Incorrect coding within the Central Electric module can disrupt various vehicle functions. In this specific case, attempting to enable Daytime Running Lights (DRLs) with taillights resulted in multiple malfunctions. The original user, after acquiring a legal VCDS version, performed an autoscan revealing fault codes within the Central Electric module (Address 09). The autoscan, detailed below, highlights two critical errors: a faulty light switch (E1) and a communication issue with the high beam assist module. These faults likely stem from improper long coding changes in Byte 18 of Central Electric module 09.
Address 09: Cent. Elect. (J519) Labels:. 1K0-937-08x-09.clb
Part No SW: 1K0 937 086 M HW: 1K0 937 086 M
Component: BCM PQ35 M 110 0651
Coding: 100020286101C7C0085C0028B004B180706002004171C9200000A0000040
01800 - Light Switch (E1)
008 - Implausible Signal
03395 - Control Module for High Beam Assistant
004 - No Signal/CommunicationBeyond these primary faults, several other functions became inoperative:
- Rear Lid Central Locking: The rear lid only responds to the remote’s dedicated button, not central locking. Activating lock/unlock in Byte 00 causes the lid to pop open slightly when unlocking via remote.
- DRL Malfunction: Despite enabling DRLs in the Multi-Function Display (MFA), they remain inactive.
- Mirror Heating Failure: The heated mirror function is not working.
- Trunk Light Issue: The light inside the trunk is not functioning.
- Coming Home/Leaving Home (CH/LH) Inoperative: Despite enabling CH/LH in the MFA, these features are not working.
These widespread malfunctions point to the corrupted coding in the Central Electric module. While Byte 18 was the initial target for modification, it’s crucial to review central electric byte 1 vcds coding for potential errors. Byte 1 often controls fundamental functionalities, and its corruption could explain the range of issues.
Using the legitimate VCDS software, meticulously compare the current coding in Byte 1 and Byte 18 against factory default values for this specific vehicle model. Ross-Tech’s official website and documentation offer valuable resources for finding the correct coding.
Restoring the correct coding for central electric byte 1 vcds and subsequent bytes is paramount. However, given the extent of the malfunctions, a full system scan and thorough analysis of all fault codes within each module is strongly recommended. This comprehensive approach ensures all underlying issues are addressed. Remember, always back up existing coding before making any changes.
Addressing the root cause, the incorrect coding, will likely resolve the associated malfunctions. This case underscores the importance of using genuine diagnostic tools and exercising caution when modifying vehicle settings. If uncertainties persist, consulting a qualified automotive technician specializing in VW/Audi vehicles is advisable. They possess the expertise and resources to diagnose and rectify complex coding issues effectively.
