After cleaning a DPF on a VW Crafter, resetting the DPF settings with VCDS is crucial. This guide explores the process, common challenges, and potential solutions using information from the Ross-Tech Wiki.
Understanding DPF Regeneration and VCDS
Diesel Particulate Filters (DPFs) trap soot from diesel engines. Regular regeneration burns off this soot, but city driving can interrupt this process, leading to DPF warnings. VCDS, a diagnostic software by Ross-Tech, allows access to engine control unit (ECU) data, enabling users to monitor and reset DPF parameters. The Ross-Tech Wiki provides valuable information on using VCDS for various procedures, including DPF-related tasks.
The Challenge of Security Access
Accessing and modifying ECU settings, such as DPF parameters, often requires bypassing security access. The VCDS Wiki (http://wiki.ross-tech.com/wiki/index.php/2.0L_CR_TDI) outlines this process. However, it requires a PIN/SKC code specific to the vehicle. Obtaining this code can be difficult, as manufacturers like VW often restrict access. This limitation poses a challenge for owners who prefer to perform maintenance themselves. The legal implications of this restricted access are a separate issue.
Resetting DPF Values After Cleaning
While the VCDS Wiki primarily addresses DPF ash levels, cleaning a DPF also requires accounting for residual soot. VCDS allows viewing “Carbon Mass (ECM/DPF Replacement)” in Long Adaptation channels. Understanding how to interpret and modify this value, which is displayed in grams, is essential. The “Consumption Since Regen” value also provides relevant information.
Forced Regeneration and Soot Value Estimation
The question arises whether a forced regeneration should be performed before or after resetting the DPF values. The Ross-Tech Wiki provides guidance on forced regeneration (http://wiki.ross-tech.com/wiki/index.php/Diesel_Particle_Filter_Emergency_Regeneration). Determining the correct soot value to enter after cleaning remains a challenge, as there’s no specific adaptation for cleaning, only for replacement. The “DPF statistics” section in the VCDS Wiki may offer further insights if the adaptation is available for the specific vehicle.
Analyzing the Autoscan
The provided autoscan reveals no error codes related to the DPF. However, faults are present in other modules, such as the Roof Display (909C – Alarm Horn: No or incorrect basic setting), Upper Console (9036 – Supply voltage: Limit value exceeded), and Central Electrics (9004 – Programmable Special Functions Control Module: Malfunction in control module; 9001 – Bulb for Left Parking Lamp: Short to Plus). While not directly related to the DPF, these faults should be addressed separately.
Conclusion: Leveraging VCDS Wiki Ross Tech for DPF Solutions
Successfully resetting DPF settings after cleaning requires careful consideration of security access, understanding relevant adaptation channels, and potentially performing a forced regeneration. The VCDS Wiki by Ross-Tech offers invaluable resources for navigating this process. However, obtaining the necessary security access codes and accurately estimating soot values remain key challenges. Further research and potentially seeking advice from experienced VCDS users may be necessary to achieve a successful DPF reset.
