2021-2022 Audi Driver Assist System Warnings and Flicker TSB

Symptoms

Owners of 2021-2022 Audi vehicles may experience issues with their driver assist systems. The primary symptoms include:

• The "intersection assist arrows flicker for a short period after the vehicle is started" (as visually represented in Figure 1, showing RCTA/Intersection assist arrows with a "Look! Safe to move?" message).
• "Various driver assist warnings are displayed on the instrument cluster."

Fault Codes / DTCs

Technicians may find no Diagnostic Trouble Codes (DTCs) stored, or one or more of the following DTCs may be present in the control module for driver assist systems (zFAS) -J1121- (address word 00A5):

Code	Description	Symptom Code	Module
C12D5FA	control unit for driver assist systems, picture processor does not respond	221281	zFAS -J1121-
B200FF9	Internal Malfunction	2117657	zFAS -J1121-
B107A16	Supply voltage for park assist sensor Voltage too low	233474	zFAS -J1121-

After a software update, in rare cases, additional DTCs may be stored in the driver assist systems control unit -J1121- (diagnostic address 00A5):

Code	Description	Symptom Code	Module
B200FF3	Internal malfunction	221193	zFAS -J1121-
B170AF1	Calibration step 2 not carried out	2117696	zFAS -J1121-

If DTC B170AF1 is stored, the ODIS test plan calculated for B170AF1 should be performed. It is also noted that DTC B107A16 may still be stored after the update, but the fault will no longer cause permanent symptoms once the DTC is cleared.

Technical Background

These customer complaints, including the Audi e-tron intersection assist flicker, have been observed with prior versions of the control unit software for driver assist systems. The issues stem from software-related malfunctions affecting the performance of various driver assistance features.

Production Solution

Audi has implemented an optimized software version for the affected control units in production vehicles starting with model year 2023. This means newer vehicles should not exhibit these issues.

Superseded Bulletins

This TSB (90 23 99 2069244/1, dated February 2, 2023) replaces PSS 2065489/1: PSS 91 Intersection assist arrows flicker after the vehicle is started. For Model Years 2019 and 2020 A6, A7, A8, Q7, Q8, and e-tron quattro, refer to the following superseded PSS documents:

• PSS 2060332: PSS 90 Audi adaptive light/Audi pre sense malfunction or driver assist systems inop, DTC C12D5FA stored.
• PSS 2061489: PSS 90 Pre sense malfunction/driver assist systems sporadically inop, DTC B200FF9 is stored in the driver assist module.
• PSS 2061689: PSS 90 Parking aid inop, DTC B107A16 stored in the driver assistance system with symptom code 233474.

Important Warnings

NOTICE: If active fault messages about driver assist systems are shown in the instrument cluster, this TPI may not solve the problem. If the flashing procedure is started despite active fault messages, the flash routine will be aborted and it may be necessary to replace control units as a result. Please attempt to resolve those cluster messages by clearing vehicle DTCs and cycling the ignition before starting this procedure.

CAUTION: Always use DoIP (Diagnostics over Internet Protocol) when flashing a control module via ODIS in supported vehicles. Not selecting DoIP may lead to extremely long flash times that may not be fully reimbursed by warranty. When prompted with the message "Should the entered SVM code be accepted or the vehicle connection be changed", ensure DoIP is selected. If not, change the vehicle access protocol by selecting "-3- Change vehicle access (CAN, DoIP, CANFD)".

Repair Procedure Summary

This Technical Service Bulletin (TSB) outlines a software update procedure to resolve the driver assist system issues, including the Audi e-tron intersection assist flicker. The update process involves:

1. Software Version Management (SVM) Update: Follow all instructions in TSB 2011732: 00 Software Version Management (SVM), operating instructions. The update may take between 30 and 90 minutes, depending on vehicle equipment and current software level.
2. Vehicle Update via SVM Action Code: Update the vehicle using the SVM action code FASISKD6A001. This code is used for diagnostic address 00A5 (zFAS control unit) to update software to version 0381 or higher. For diagnostic address 0013, the software is updated to version 0501 or 0641 or higher. The old software versions for 0013 could be 0492 or 0500, and for 00A5 could be 0364, 0365, 0366, or 0371.
3. Bus Sleep Cycle: After the update, perform a bus sleep cycle by exiting the flash context in ODIS, turning off the ignition, removing the charger and diagnostic dongle from the vehicle, closing the hood, trunk, and all doors, and waiting approximately 6 minutes until the vehicle has gone to "sleep."

Warranty Information

This repair is covered under warranty with the following details:

• Claim Type: 110 (up to 48 Months/50,000 Miles) or G10 (for CPO Covered Vehicles – Verify Owner). If the vehicle is outside of any warranty, this TSB is for informational purposes only.
• Service Number: 9093
• Damage Code: 0039
• Labor Operations: Software Update (Includes checking for DTCs) using operation code 0151 0000, with a maximum time allowance of 200 TU.
• Diagnostic Time: GFF (No allowance, 0 TU), Road test prior to service procedure (No allowance, 0 TU), Road test after service procedure (No allowance, 0 TU).
• Claim Comment: As per TSB 2069244/1. All warranty claims must adhere to the Audi Warranty Policies and Procedures Manual.

Additional Information

To complete this procedure, TSB 2011732: 00 Software Version Management (SVM), operating instructions, is a necessary reference. All part and service references provided in this TSB (2069244) are subject to change and/or removal. Always check with your Parts Department and/or ETKA for the latest information and parts bulletins, and the Repair Manual for fasteners, bolts, nuts, and screws that require replacement during the repair.

NHTSA ID: 10232759