2021-2024 Audi A6/S6 Parking Aid, Lane Assist TSB 2070488/2

Owners of certain 2021-2024 Audi A6, A6 allroad, S6, and RS 6 Avant vehicles may notice that their rear parking aid, lane change assist, or rear lid power opening functions are inoperative. This can be a frustrating experience, especially when relying on these systems for daily driving.

Symptoms

If you own a 2021-2024 Audi A6, A6 allroad, S6, or RS 6 Avant, you might observe one or more of the following issues:

• "Rear parking aid does not work"
• "Lane change assist does not work"
• "Rear lid power opening does not work"

These symptoms indicate a malfunction in the affected systems, which can impact convenience and safety features of your vehicle. If you are experiencing an "Audi A6 parking aid not working" message, this TSB may apply to your vehicle.

Fault Codes / DTCs

When these issues occur, a technician performing diagnostics may find various "open circuit DTCs" (Diagnostic Trouble Codes) stored in the vehicle's system. The specific DTCs set will depend on which wires in the harness are affected by the damage.

Diagnosis / Trigger Conditions

Audi Technical Service Bulletin 2070488/2 explains that environmental factors can cause damage to the wiring at the TSFHL coupling point, located on the rear left bumper. This damage leads to the reported malfunctions. Technicians will typically inspect this specific area for visible signs of wiring damage.

Repair Procedure Summary

If wiring damage is identified, the repair involves several steps to restore functionality and prevent future issues:

1. Inspection: The technician will inspect the TSFHL connection point at the rear bumper for any damage. The exact location of fasteners, cable routing, and connectors may vary slightly depending on the bumper type.
2. Harness Repair: If damage is found, the wiring harness will be repaired using a specialized wiring harness repair set, such as VAS 1978 B/C.
3. Re-wrapping: After repair, the wiring harness is re-wrapped with adhesive tape (part number N 10729002). This tape must overlap by 50% and stop 40 mm before the T14mx connector housing to match the original wrapping.
4. Protective Sleeve Installation: A protective sleeve (part number N 10892001) is secured to the T14mx connector using cable ties (part numbers N 10623101 and N 90937701). It is crucial that this protective sleeve is not attached directly to the wiring harness with adhesive tape.

Required Tools or Parts

To perform this repair, Audi service centers will use specific tools and parts, including:

• Wiring harness repair set VAS 1978 B/C
• Adhesive tape (N 10729002)
• Protective sleeve (N 10892001)
• Cable tie (N 10623101)
• Cable tie (N 90937701)
• Fasteners, bolts, nuts, and screws as needed (refer to ETKA/ELSA)

Important Warnings

Owners and technicians should be aware of the following:

• "If no damage is found this TSB does not apply, carry out standard diagnosis." This means if the wiring is intact, the problem lies elsewhere, and standard diagnostic procedures should be followed.
• When re-wrapping the harness, ensure the tape "overlaps by 50% and stops 40 mm before T14mx connector housing (see original wrapping in Figure 1)."
• The "Protective sleeve must not be attached to wiring harness with adhesive tape." This is critical for proper function and durability.

Owner Action

If you are experiencing issues with your rear parking aid, lane change assist, or power rear lid, and you own a 2021-2024 Audi A6, A6 allroad, S6, or RS 6 Avant, it is recommended to contact your authorized Audi dealer. Reference Technical Service Bulletin 2070488/2 when discussing the problem. While the TSB is informational only if your vehicle is outside of warranty, claims submitted for payment must adhere to the Audi Warranty Policies and Procedures Manual. The service number for this issue is 9759 with damage code 0033.

Source: NHTSA ID: 11013737