2019-2023 Audi A6 Parking Aid / Lane Assist Malfunction TSB

Owners of 2019-2023 Audi A6, A6 allroad, S6, and RS 6 Avant models may experience issues with their vehicle's rear parking aid, lane change assist, or power rear lid. This Technical Service Bulletin, identified as 97 23 96 2070488/1, addresses these malfunctions, which typically stem from wiring damage.

Symptoms

If you own a 2019-2023 Audi A6, you might notice one or more of the following operational problems:

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

These symptoms indicate a potential issue with the electrical system, often leading to a situation where your Audi A6 parking aid not working.

Fault Codes / DTCs

While no specific Diagnostic Trouble Codes (DTCs) are listed in TSB 2070488/1, the document notes that various open circuit DTCs may be set. The exact codes will depend on which specific wire within the affected harness is damaged.

Diagnosis / Trigger Conditions

The root cause for these malfunctions is often environmental influences leading to damage or chafing of the wiring at the coupling point on the rear left bumper, specifically at the TSFHL location. A technician will typically find the customer concern to be reproducible, confirming the issue with the Audi A6 parking aid not working or other related systems.

Repair Procedure Summary

The repair outlined in TSB 2070488/1 involves inspecting and repairing the wiring harness. First, a technician will inspect the connection point TSFHL at the rear bumper for any visible damage, as shown in Figure 1 of the bulletin. If damage is found, the harness will be repaired.

The repair process includes removing existing cable ties and releasing the T14mx connector from its mounting. Damaged wires are then repaired using a specialized wiring harness repair set, VAS 1978 B/C. After the repair, the wiring harness is re-wrapped with adhesive tape, part number N 10729002, ensuring a 50% overlap and stopping 40 mm before the T14mx connector housing to match the original wrapping.

Finally, a protective sleeve, part number N 10892001, is secured to the T14mx connector using cable tie N 10623101. Additional adhesive tape N 10729002 is wrapped around the protective sleeve, and three layers of the same tape are applied underneath cable tie N 90937701, as illustrated in Figure 3 of the TSB. If no damage is found during the initial inspection, this TSB does not apply, and standard diagnostic procedures should be followed.

Required Tools or Parts

To perform the repair described in TSB 2070488/1, the following parts and tools are specified:

• Wiring harness repair set: VAS 1978 B/C
• Protective sleeve: N 10892001 (Quantity: 1)
• Cable tie: N 10623101 (Quantity: 1)
• Cable tie: N 90937701 (Quantity: 1)
• Adhesive tape: N 10729002 (Quantity: 0.2, likely referring to meters or rolls)
• Fasteners, Bolts, Nuts, and Screws: As needed per the Repair Manual (See ETKA/ELSA)

Important Warnings

It is crucial to note that if a technician inspects the wiring at the TSFHL connection point and finds no damage, this Technical Service Bulletin does not apply. In such cases, standard diagnostic procedures should be performed to identify the root cause of the issue, rather than proceeding with the repair outlined here.

Owner Action

If you are experiencing any of the described symptoms, such as your Audi A6 parking aid not working, or issues with lane change assist or the power rear lid, you should schedule an appointment with an authorized Audi service center. The service center will diagnose the problem and perform the necessary repairs according to TSB 2070488/1.

Warranty coverage for this repair is typically available for vehicles up to 48 months or 50,000 miles. For Audi Certified Pre-Owned (CPO) vehicles, coverage is under the G10 program, requiring owner verification. If your vehicle is outside of any warranty, this Technical Service Bulletin serves as informational guidance, and repair costs may apply.

NHTSA ID: 10238196