2023-2026 Audi Vehicles Electric Tailgate Malfunction TSB

Audi has issued Technical Service Bulletin (TSB) 2079214/3 to address concerns regarding electric tailgate malfunctions in various 2023-2026 Audi vehicles. This bulletin offers comprehensive guidance for technicians on diagnosing and repairing issues where the electric tailgate does not operate as expected, such as failing to open or close. The TSB emphasizes using the ODIS workshop tester for event memory-based fault finding, alongside detailed manual checks to pinpoint defective components in the electric tailgate system.

This information is crucial for owners experiencing problems with their Audi e-tron electric tailgate or similar systems in other affected models, ensuring a targeted and efficient repair process.

Symptoms of Electric Tailgate Malfunction

Owners may observe the following symptoms indicating an issue with their electric tailgate:

• The electric tailgate does not work at all.
• The tailgate does not open or close as desired.
• Event memory entries related to the tailgate system may be present in the vehicle's diagnostic system.

Technical Background

This TSB provides a detailed explanation of how the electric tailgate system functions across various Audi platforms, including MQB (Modular Transverse Matrix), MEB (Modular Electric Drive Matrix), MLB (Modular Longitudinal Matrix), PPE (Premium Platform Electric), and PPC (Premium Platform Combustion). It outlines the communication between control points like the remote key (A1) and interior door button (A2) with central control units such as the Body Computer Module (BCM), In-Car Application Server (ICAS), BCM2, Tailgate Control Unit (HDSG), Sensor Actor Rear (SAR), and HCP4. Understanding these interactions is key to diagnosing why an Audi e-tron electric tailgate might fail.

Diagnostic Addresses and Data

While specific Diagnostic Trouble Codes (DTCs) are not listed, the TSB highlights critical diagnostic addresses and measured value blocks for fault analysis using the ODIS workshop tester. These provide insight into the system's operation and potential failures:

• Tailgate Control Unit Diagnostic Addresses:
  • 006D: Relevant for MQB (Audi A3, Q3), MEB (Audi Q4 e-tron), and MLB vehicles (Audi A4, A5, A6, A7, A8, Q5, Q7, Q8, Q8 e-tron, e-tron GT).
  • 0046: Relevant for PPE and PPC vehicles (new A5, new A6, A6 e-tron, new Q5, Q6 e-tron).
• Measured Value Blocks (Tailgate Control Unit): These blocks record the last five reasons the tailgate stopped moving, basic setting status, reasons for basic setting abortion, luggage compartment cover malfunction, power latch malfunction, and current lock/power latch/control point status.
• Central Locking Diagnostic Addresses:
  • 0019: Relevant for MEB (ICAS).
  • 0009: Relevant for MQB, PPE, PPC.
  • 0046: Relevant for MLB.
• Measured Value Blocks (Central Locking): These blocks provide the current lock status, a list of lock faults, and the last 20 control point entries, which can help determine if a rear lid opened unintentionally (e.g., due to key operation in a pocket).

It is crucial to read out these measured value blocks immediately after a customer complaint, as they can be overwritten.

Manual Fault Finding and Diagnosis

The TSB provides detailed manual checks to identify defective components, especially when the ODIS workshop tester does not suggest a specific repair. These checks focus on the tailgate lock and power latch:

For MQB, MEB, and MLB Vehicles:

1. Close the tailgate from its fully open position.
2. Manually press the lock's pre-latch using a screwdriver or pen. The tailgate should stop moving immediately. If it continues to move, the tailgate lock may be defective.
3. Open the tailgate to allow the pre-latch to pop out.
4. Close the tailgate again and then stop it a second time by manually pressing the pre-latch. The power latch should activate, pulling the tailgate lock into the main latch and returning to its original position. If this sequence does not occur, the power latch may be defective.

For PPE and PPC Vehicles:

1. Close the tailgate from its fully open position.
2. Manually press the lock's pre-latch using a screwdriver or pen. The tailgate should stop moving immediately. If not, the tailgate lock may be defective.
3. If the remaining opening angle is less than 13%, the power latch automatically activates.
4. The power latch can be tested from inside the vehicle. Move the tailgate to a position with less than 13% opening angle remaining and then operate the tailgate lock pre-latch from the inside.

Audi provides video demonstrations for these manual checks, accessible via QR codes in the original TSB document.

WARNING: After any repair or adjustment, the basic setting of the tailgate must be performed to ensure proper operation and prevent excessive force from going undetected.

Required Tools or Software

• ODIS workshop tester: Essential for reading diagnostic addresses and measured value blocks.
• Screwdriver or pen: Used for manual checks of the tailgate lock pre-latch.

Owner Action

If you are experiencing issues with your Audi e-tron electric tailgate or any other affected Audi model, it is recommended to visit an authorized Audi service center. Technicians will utilize the diagnostic procedures outlined in TSB 2079214/3, including the ODIS workshop tester and manual checks, to accurately diagnose and repair the malfunction. This TSB is informational and generally not applicable to Audi warranty claims.

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Source: NHTSA ID 11029395