2021 Audi Driver Assist Malfunctions DTC B200FF9

Owners of certain 2021 Audi models may experience various malfunctions with their driver assistance systems, including lane change assist, intersection assist, traffic sign recognition, and Adaptive Cruise Assist. These issues can be accompanied by Diagnostic Trouble Code (DTC) B200FF9 and specific warning messages displayed in the instrument cluster. This bulletin outlines a software update designed to optimize these features and resolve the underlying problems.

Symptoms

Owners might notice the following symptoms related to 2021 Audi driver assist malfunctions B200FF9:

• Lane Change Assist/Intersection Assist: The system may sporadically stop working, displaying one of these messages in the instrument cluster:
  • “Intersection assist: fault. Please contact service.”
  • “Side assist and exit warning system: fault. Please contact service.”
  • “Rear cross-traffic assist: fault. Please contact service.”
  • “Audi pre sense: fault. Please contact service.”
• Traffic Sign Recognition: Speed limit settings are not permanently stored and are lost with every ignition cycle.
• Adaptive Cruise Assist (ACA): In vehicles with steel suspension, ACA may disengage or lose calibration when towing a trailer or bike rack.

Fault Codes / DTCs

Technicians may find the following DTCs related to the 2021 Audi driver assist malfunctions B200FF9:

Code	Description	Module(s) Affected	Symptom Code(s)
B200FF9	Internal malfunction	J1088/J1089 (front corner radar control modules)	1311089
B200FF9	Internal Malfunction	J769/J770 (lane change assist control modules)	1311057, 1311058, 1311059, 1311060

It is also possible for these customer concerns to occur without a DTC being stored in the vehicle's memory.

Technical Background

This issue stems from the optimization of multiple driver assist features. The software update affects several control modules, including:

• Driver assist systems control module (zFAS), J1121 (address word 00A5)
• Adaptive cruise control module, J428 (address word 0013)
• Lane change assist control module, J769/J770 (address words 003C/00CF)
• Front left/front right radar sensor control module for object detection, J1088/J1089 (address words 00DB/00DC)
• Control module for laser distance control, J1122 (address word 00CD)
• Airbag control module, J234 (address word 0015)

New software is being implemented in production to prevent these issues in future vehicles.

Important Warnings for Owners

Owners should be aware of the following critical information regarding this software update:

• Prior Campaigns: All outstanding service campaigns must be completed before this update can be performed.
• EDR Backup: Federal law requires the airbag's Event Data Recorder (EDR) to be backed up before running this update. Your dealership will require you to sign a declaration of consent for this procedure.
• Personalization Settings: This update involves multiple control modules, and certain customer personalization settings might be reset to factory settings. Be prepared to reconfigure any custom settings after the service.
• Third-Party Modifications: Audi is not liable if third-party modifications, non-genuine accessories, or undocumented retrofits become inoperable after the update.
• Warranty: If your vehicle is outside of its warranty period, this Technical Service Bulletin is for informational purposes only, and charges may apply.

Repair Procedure Summary

The repair involves a multi-step software update using the ODIS diagnostic system. The process takes approximately 60-120 minutes, including 50-110 minutes for the software update and 10 minutes for SVM work. The general steps include:

1. System Designation Check: The technician will use ODIS to determine the specific zFAS (J1121) system designation.
2. SD Card/USB Selection: Based on the zFAS variant, the appropriate SD Card (for MY20 Audi e-tron quattro/Sportback) or USB-C drive (for other 2021 vehicles) will be selected.
3. EDR Backup & Consent: For MY20 Audi e-tron models, the Event Data Recorder (EDR) will be backed up, and customer consent will be obtained. A specific test program (TSB 2061023) will be run in ODIS, and diagnostic session results will be uploaded.
4. Peripheral Control Module Update: The peripheral control modules will be updated using SVM code FASISKD5A001.
5. Flash Context Exit: The technician will exit the flash context in ODIS.
6. Media Insertion: The selected SD Card or USB-C drive will be inserted into the vehicle.
7. zFAS Application Software Update: The zFAS application software will be updated using SVM code FASISKD5A002.
8. Bus Sleep Cycle: After the updates, the vehicle will be put through a bus sleep cycle by turning off the ignition, removing diagnostic tools, closing and locking the vehicle, and waiting approximately six minutes.

Required Tools or Parts

Specific parts are required depending on the vehicle model year and zFAS variant:

• For MY20 Audi e-tron quattro and Audi e-tron Sportback (zFAS Var B/C):
  • SD Card P/N: 4N0906961AR (Quantity: 01, Shop tool)
• For MY21 A6, A7, A8, Q7, Q8, Audi e-tron quattro, and Audi e-tron Sportback (zFAS Var B/C):
  • USB-C drive P/N: 4N1906961 (Quantity: 01, Shop tool)

Additionally, an ODIS Tester and the appropriate SVM code are necessary for the procedure.

Owner Action

If you are experiencing any of the described 2021 Audi driver assist malfunctions B200FF9, contact your authorized Audi dealership. Explain the symptoms you are observing and mention the Technical Service Bulletin 2063502/1. The software update is typically covered under warranty for eligible vehicles (up to 48 months/50,000 miles).

Warranty Information

This service is covered under Audi's warranty for up to 48 months or 50,000 miles, whichever comes first. Certified Pre-Owned (CPO) vehicles may also be eligible under claim type G10. The service number is 9093, and the damage code is 0039. Labor operations for the software update, including DTC checks, are coded as 0151 0000.

NHTSA ID: 10199425