2016-2026 Audi Wiring Harness Repair TSB

Audi has issued Technical Service Bulletin (TSB) 2061976/4 to provide guidance for technicians on properly repairing and documenting wiring harness issues across a wide range of its vehicles. This TSB, released on August 26, 2025, aims to improve the quality of repairs and documentation for electrical system faults.

Symptoms

Owners may notice a warning light on the dashboard or experience a general malfunction within the vehicle's electrical system. These symptoms often indicate an underlying wiring issue that requires professional diagnosis.

Diagnosis / Trigger Conditions

When a warning or malfunction is reported, a wiring issue is frequently identified as the root cause. Technicians are instructed to thoroughly document their findings, including:

• The specific circuit affected.
• Pin identification of the main circuit.
• Results of circuit checks, including resistance and voltage values.
• The precise location where the damaged pin or circuit was found.
• Any other relevant details to support the findings.

For example, a technician might find a FlexRay circuit with high resistance or a short circuit to ground, such as a damaged green FlexRay wire between specific control units (J743 Dual Clutch and J533 Data Bus on Board Diagnostic Interface) located under the driver's seat along the frame rail. Overlays may be used as a diagnostic aid to pinpoint such issues, including those affecting the Audi e-tron wiring harness.

Repair Procedure Summary

This TSB outlines specific repair procedures depending on the nature of the wiring damage:

• For root causes related to pins or coaxial connector ends: Technicians should retain approximately 10-20 mm of the original wire, where space allows, and repair the connection using the VAS1978B wiring harness repair set.
• For root causes related to high resistance or a short circuit in the wiring: Overlays can be used for diagnosis. The affected section of wire that was removed or found faulty should be retained. Faulty sections of the wire must be repaired using the VAS1978B tool.

Crucially, technicians are required to take detailed photos for accurate location and findings. These photos should include a perspective view (Figure 1), the original routing before disturbance (Figure 2), and a close-up of the damaged circuit (Figure 3). All photos must have a date stamp and VIN reference, and be taken with sufficient light.

Required Tools or Parts

To perform these wiring harness repairs and diagnostics, technicians will need specific tools:

• VAS 1978B: A specialized wiring harness repair set.
• VAS 6160 / VAS 6150: A VAS tester equipped with the current version of ODIS (Windows 10) for diagnostics and system checks.

Owner Action

If you experience a warning light or an electrical system malfunction in your 2016-2026 Audi, it is recommended to schedule an appointment with an authorized Audi service center. Technicians are trained to diagnose and address these issues following the detailed procedures outlined in TSB 2061976/4. When claiming wire repairs under warranty, specific PIDs (Process Identifiers) like PID 9709 (Central Wiring Harness), PID 9713 (Engine compartment wiring harness), PID 9732 (Door harness), PID 9757 (Seat harness), PID 9779 (Roof wiring harness), PID 9759 (Bumper harness), and PID 9781 (Transmission wiring harness) are used to differentiate which harness is affected. This ensures proper documentation for your Audi e-tron wiring harness or other Audi model's electrical system.