Recoding, corresponding to VAG 1551/1552 function 07, allows customization of various options within a vehicle’s Control Module using diagnostic tools like VCDS. This process, often involving an “Index Dm Vcds,” requires careful attention to detail and a thorough understanding of the procedures involved.
Example of VCDS Coding information balloon.
Several key factors influence the recoding process:
Important Considerations Before Recoding
- Login Requirement: Some modules necessitate a valid login before recoding is possible.
- Workshop Code (WSC): VCDS offers the unique ability to retain the original WSC or input a custom one, unlike some diagnostic tools that leave a default WSC after recoding.
- Importer Number: Relevant primarily for controllers utilizing KWP-2000, the Importer Number typically remains unchanged unless pre-configured in the Options screen.
- Coding Chart Data: Label files can contain up to 20 lines of coding chart data, displayed as helpful information within the coding screen.
Airbag Coding with VCDS
When coding new Airbag Modules in compatible VW models, VCDS, when used with a professional-grade HEX interface, can suggest a coding value based on the controller’s index number. While not guaranteed to be accurate, this suggestion provides a valuable starting point. Incorrect coding values are typically rejected by the module, reverting to a default value. Consult the Airbag Coding page for further details.
Locating the index number for the airbag controller.
Coding Slave Modules
Modern vehicles often feature codeable “slave” modules. VCDS presents a dropdown list of available modules within both regular and “long” coding screens, simplifying selection for coding procedures.
Selecting a slave module for coding.
Battery Coding Assistant in VCDS
For vehicles requiring battery coding within the 61-Battery Regulation module, VCDS provides a dedicated assistant. Enter the 10-digit serial number, omitting any preceding vendor codes.
Using the Battery Coding Assistant in VCDS.
Accessing Installation Lists
Certain vehicles, such as those based on the Audi B8 platform, require accessing the Gateway Installation List through the Open Controller screen for the CAN Gateway, rather than via Long Coding. This functionality is detailed on the Installation List Page.
Long Coding with VCDS
Essential for coding certain control modules in newer CAN-based diagnostic systems, Long Coding involves complex hexadecimal strings. VCDS facilitates this process through copy-and-paste functionality and the Long Coding Helper, often used with applications like LCode.exe. This helper allows users to modify individual bytes and bits within the coding string.
Example of the Long Coding interface in VCDS.
Additional Features and Considerations
- Soft Reset: This option prompts a control module reboot after coding changes, sometimes necessary for changes to take effect.
- Experimental Coding: VCDS provides access to “raw” or “experimental” coding data for newer modules where verified information might not yet be available. This data, clearly identified as experimental, allows users to explore coding options but should be used cautiously.
Example of the experimental coding warning in VCDS.
- Uninitialized Control Module Warning: This warning indicates missing WorkShop Code, Importer, or Equipment numbers, potentially preventing coding changes. VCDS offers automated solutions or manual input options to address this issue.
Successfully recoding a control module requires careful attention to detail and a thorough understanding of the specific procedures involved. Utilizing the features and functionalities within VCDS, alongside comprehensive documentation and resources, allows for efficient and accurate modification of vehicle settings.
