2021-2026 Audi Door Lock Fault TSB 2063236/9

Audi has issued Technical Service Bulletin (TSB) 2063236/9 to address customer complaints regarding front and rear door lock malfunctions across several models from 2021 to 2026. This TSB outlines common symptoms, diagnostic trouble codes (DTCs), and a detailed service procedure to resolve these issues.

Symptoms

Owners may experience the following symptoms related to a door lock fault:

• The front or rear door (on either side) cannot be opened from the outside or the inside.
• Warning messages may appear on the instrument cluster, such as those related to the exit warning system or central locking, concerning the front or rear door.
• The vehicle might be locked, but it is still possible to open a door without using the key, indicating a potential malfunction in the locking mechanism.

Fault Codes / DTCs

Technicians may find one or more of the following diagnostic trouble codes (DTCs) logged in the vehicle's event memory, indicating a 2022 Audi e-tron door lock fault or similar issue in other models:

Diagnostic Address	Diagnostic Trouble Code	Fault Symptom	Storage State
Driver's door electronics	B122D29	Lock unit for central locking implausible signal	Intermittent
Passenger's door electronics	B122D29	Lock unit for central locking implausible signal	Intermittent
Rear driver's side door electronics	B14FF29	Motor for child safety lock implausible signal	Intermittent
Rear passenger side door electronics	B14FF29	Motor for child safety lock implausible signal	Intermittent
Driver's door electronics	B122B13	Central locking motors Open circuit	Intermittent
Passenger's door electronics	B122B13	Central locking motors Open circuit	Intermittent

Diagnosis and Trigger Conditions

Before replacing any door lock components, the TSB emphasizes checking for incorrect operation by the customer. This includes:

• Whether the interior door handle is pulled too quickly or past its end stop, which can trigger messages or faults without an actual door lock problem.
• If the door opens after pulling the interior handle twice or using the exterior handle, indicating no fault with the door lock itself.

Technicians are instructed to read and erase event memory entries in the control unit. After clearing codes, the ignition should be cycled, and the door opened and closed to check if the fault reappears. If the fault does not re-log, the door lock is considered functional.

Technical Background

Modern Audi door locks operate via an electrical signal from the interior or exterior door handle to the door control unit. This signal activates a microswitch, which then powers an electric motor to release the rotary latch, allowing the door to open easily. Despite this electronic system, two Bowden cables remain, providing a mechanical backup to open the door if the microswitch or control motor fails. In such cases, the interior door handle must be pulled out further than normal, often twice, to engage the mechanical release.

Important Warnings

Audi explicitly states that replacing parts or attempting repairs without fully considering the guidance in TSB 2063236/9 will not resolve the problem. Unjustified work or replacement parts may be charged back, and warranty claims will not be permitted in such instances. Owners should be aware that if the vehicle is outside of warranty, this Technical Service Bulletin is for informational purposes only.

Repair Procedure Summary

The service procedure outlined in TSB 2063236/9 involves several steps:

1. Customer Interview: Clarify the exact details of the complaint with the customer to understand the conditions under which the 2022 Audi e-tron door lock fault occurs.
2. Event Memory Check: Read out and erase any event memory entries in the control unit. After clearing, switch the ignition off and on, open and close the door, and then recheck if faults are logged. If the door operates normally and no new faults are logged, the door lock is considered okay.
3. Mechanical Inspection: Conduct a thorough mechanical inspection of relevant components:
   • Electrical Wiring and Bowden Cables: Check the electrical wiring and mechanical Bowden cables at the door lock and interior/exterior door handles for any damage, irregularities (e.g., twisting, incorrect routing, water/ice traces, stiffness). Replace affected components if necessary.
   • Exterior Door Handle Return: Verify that the exterior door handle returns to its flush, original rest position after operation. If it does not, refer to TSB 2060196,