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| − | = WARNING: RESTRICTED ACCESS =
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| − | Your attempt to access this page is considered UNAUTHORIZED!
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| − | '''ERROR 401: UNAUTHORIZED'''
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| − | Your IP address has been logged.
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| − | ------------------------------------------------------------
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| − | = Volkswagen SFD, SFD2 & Service Reminder Reset (SRI) with VCDS =
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| − | == Overview ==
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| − | Volkswagen Group introduced SFD ('''Schutz der Fahrzeugdiagnose''' – Protection of Vehicle Diagnostics) in 2020 to enhance cybersecurity and control access to vehicle software. In 2024, a second layer called '''SFD2''' was introduced, requiring cryptographic validation for critical changes.
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| − | This page explains how VCDS interacts with SFD and SFD2 systems and provides step-by-step instructions for resetting the Service Reminder (SRI) on protected vehicles.
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| − |
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| − | == What is SFD and SFD2? ==
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| − | '''SFD (v1)''' restricts coding, adaptations, and other “write” functions unless a one-time unlock token is used. VCDS supports this system using a manual token entry method.
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| − | '''SFD2 (v2)''' is used in 2024+ vehicles and protects specific data changes using encrypted, per-operation validation. SFD2 requires Volkswagen’s online infrastructure and is currently unsupported by VCDS.
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| − | SFD and SFD2 do '''not''' block:
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| − | * Reading fault codes (DTCs)
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| − | * Viewing live data (Measuring Blocks)
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| − | * Performing an Auto-Scan
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| − |
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| − | == How VCDS Works with SFD ==
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| − | VCDS supports SFD by:
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| − | * Detecting SFD-protected modules
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| − | * Displaying the module's challenge string
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| − | * Allowing manual entry of the corresponding unlock token
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| − | VCDS does not generate or request unlock tokens itself. Tokens must be obtained separately and are valid for:
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| − | * One module only
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| − | * One session (approximately 90 minutes)
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| − | '''SFD2 is not supported by VCDS.'''
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| − |
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| − | == Manual Unlock Process in VCDS ==
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| − | # Open VCDS and connect to the module
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| − | # Attempt a function (e.g., Adaptation or Security Access)
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| − | # Copy the displayed challenge string
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| − | # Submit the challenge to a trusted token provider
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| − | # Paste the returned release token into VCDS
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| − | # The module unlocks for ~90 minutes
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| − |
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| − | == Resetting the Service Reminder (SRI) ==
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| − | === Vehicles Without SFD (Pre-2020) ===
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| − | Older vehicles do not require SFD unlocks.
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| − | → [https://www.ross-tech.com/vcds/tour/sri-reset.php SRI Reset Tour Page]
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| − |
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| − | === Vehicles With SFD ===
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| − | Some newer vehicles (e.g., Golf 8, ID.4) have SFD in:
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| − | * '''17-Instruments'''
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| − | * '''5F-Infotainment'''
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| − | Steps:
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| − | # Retrieve the challenge string in VCDS
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| − | # Obtain and enter the unlock token
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| − | # Perform the SRI reset within the 90-minute window
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| − |
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| − | === Vehicles With SFD2 / Gateway Filtering ===
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| − |
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| − | Newer platforms may also use a diagnostic filter in '''19-Gateway'''.
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| − | Steps:
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| − | # Retrieve and unlock 19 using a token
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| − | # In 19, go to Adaptation and set:
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| − | <code>DE16611 – Diagnosis filter: temporary deactivation → not active</code>
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| − | # This disables the diagnostic filter for ~20 km
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| − | # Unlock 5F (or other protected modules) using tokens
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| − | # Perform the SRI reset
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| − |
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| − | <span style="color:orange;"><b>Tip:</b> While in R-Mode, you can collect challenge strings for both 19 and 5F and request both tokens at once.</span>
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| − |
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| − | == SFD Requirement Matrix for SRI Reset ==
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| − |
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| − | {| role="presentation" class="wikitable" style="background:lightgray; text-align:center; width:99%;" border="0"
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| − | |-
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| − | ! Service function !! Vehicles Without SFD !! SFD in 17-Instruments !! SFD in 5F-Infotainment !! SFD2 Gateway Filter
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| − | |-
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| − | ! SRI (Service Reminder) Reset
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| − | | style="background:limegreen" | Just perform SRI reset || style="background:orange" | Unlock 17 first || style="background:orange" | Unlock 5F first || style="background:red" | Unlock 19, then unlock 5F
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| − | |-
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| − | ! Is SFD Unlock Required?
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| − | | style="background:limegreen" | No || style="background:orange" | Yes || style="background:orange" | Yes || style="background:red" | Yes in 19 and 5F
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| − | |-
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| − | ! Can You Save Adaptation Values?
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| − | | style="background:limegreen" | Yes || style="background:orange" | Yes, after unlocking 17 || style="background:orange" | Yes, after unlocking 5F || style="background:red" | Unlock 19 to disable filter, then unlock other modules
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| − | |}
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| − |
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| − | <sup>1</sup> 17 – Instrument Cluster
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| − | <sup>2</sup> 5F – Infotainment / MMI
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| − | <sup>3</sup> 19 – CAN Gateway with SFD2 diagnostic filtering
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| − | == NIx Coding Index Table ==
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| − | Some vehicles contain a PR code indicating cybersecurity level:
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| − |
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| − | {| class="wikitable"
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| − | |-
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| − | ! NIx Index !! Cybersecurity Protection !! Software Update Protection !! SFD2 Gateway Present?
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| − | |-
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| − | | NI0 || No || No || No
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| − | |-
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| − | | NI1 || Yes || Yes || No
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| − | |-
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| − | | NI7 || Yes || No || No
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| − | |-
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| − | | NI8 || No || No || Yes
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| − | |-
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| − | | NI9 || Yes (non-UNECE markets) || Yes (non-UNECE markets) || No
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| − | |}
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| − | == Factory Tool vs VCDS Comparison ==
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| − |
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| − | {| class="wikitable"
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| − | ! Feature !! ODIS (Factory Tool) !! VCDS
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| − | |-
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| − | | Token Handling || Online and automatic || Manual (offline)<sup>1</sup>
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| − | |-
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| − | | Backend Access || Yes || No
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| − | |-
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| − | | Lockout Behavior || Immediate logout or session close || Timeout (~90 minutes)
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| − | |-
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| − | | Token Source || VW Dealer Portal || Third-party vendor
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| − | |}
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| − | <sup>1</sup> Online functions coming soon
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| − | == Related Control Module Addresses ==
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| − |
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| − | * '''17 – Instruments''': Cluster, odometer, service interval
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| − | * '''5F – Infotainment''': MMI, media interface
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| − | * '''19 – Gateway''': Network access, diagnostic filter
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| − |
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| − | == Resources ==
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| − | * [https://www.ross-tech.com/vcds/tour/sri-reset.php SRI Reset Tour]
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| − | * [https://www.ross-tech.com/vcds/tour/adaptations.php Adaptations Function Tour]
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| − | * [https://forums.ross-tech.com/ Ross-Tech Forums]
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| − |
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| − | <span style="color:#d93025;"><b>Note:</b> If readiness or service reset functions fail, ensure the engine control unit software is up to date and that a full OBD drive cycle has been completed.</span>
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