2022-2024 BMW HV Charging Socket Programming Abort

Owners of certain 2022-2024 BMW electric and plug-in hybrid vehicles may encounter a "programming abort" condition related to the high-voltage charging socket. This issue, documented in BMW Service Information Bulletin (SIB) 61 03 24, affects the Combined Charging Unit (CCU) and can lead to various fault codes.

This technical service bulletin addresses situations where the CCU experiences a programming abort due to a lack of communication with the high-voltage charge socket electronics. Understanding the symptoms, causes, and proper repair procedures is crucial for resolving this complex issue.

Symptoms

Owners may not directly observe a specific dashboard warning for a "programming abort," but the underlying communication failure can lead to the Combined Charging Unit (CCU) going offline. This condition is indicated by specific fault codes stored in the vehicle's system.

Fault Codes / DTCs

When the high-voltage charging socket communication fails, the CCU will store specific fault codes. These codes point to inconsistencies or missing messages from the charging socket electronics. The primary fault indicating a BMW charging abort is S0768.

Code	Description
S0768	Programming Abort
0321A9	High voltage charging socket: hardware inconsistent
0321AA	High voltage charging socket: software inconsistent
CCU_P1 S0768	Programming abort: Combined charging unit
D7975D	Message (status of charging socket flap) missing, receiver CCU, transmitter high-voltage charging socket
D79763	Message (status display of charging process status) missing, receiver CCU, transmitter high-voltage charging socket
D79769	Message (status of charging plug lock) missing, receiver CCU, transmitter high-voltage charging socket
D7976C	Message (AC charging, temperature of high-voltage charging socket) missing, receiver CCU, transmitter high-voltage charging socket
D7976F	Message (DC charging, temperature of high-voltage charging socket) missing, receiver CCU, transmitter high-voltage charging socket rear
D797C3	Message (status of high-voltage charging socket) missing, receiver CCU, transmitter high-voltage charging socket

Diagnosis / Trigger Conditions

The Combined Charging Unit (CCU) performs a check for the coding file of the charging socket via the CCU CAN. If an incorrect charging socket is installed, or if there's a communication breakdown between the CCU and the charging socket electronics, the CCU will "drop" the coding file. This action results in the storage of faults like S0768 Programming Abort and others indicating hardware or software inconsistency.

Important Warnings

BMW has issued critical warnings regarding this issue to prevent further complications:

• "Do not program a CCU that has fault S0768 Programming Abort stored!" Attempting to program the CCU while this fault is present will cause the CCU to go offline, appearing "Blue" in the ISTA module tree.
• "Do not attempt to program the car until the communication is reestablished with the charge socket, or the CCU will be offline as mentioned above." It is essential to resolve the communication issue first.

Handling high-voltage components requires specialized training. Disconnecting or removing any high-voltage component necessitates disabling the HV system by a properly trained technician. Removal of the High Voltage Battery can ONLY be performed by an HV Specialist Technician with specific certifications (e.g., ST1825 for Alternative Drive Part 2, ST2205 for Generation 5 High-voltage systems).

Repair Procedure Summary

The repair process for a BMW charging abort linked to the high-voltage charge socket involves several diagnostic and corrective steps, as outlined in SIB 61 03 24:

1. Initial Diagnostics: Technicians should first follow the ISTA test plans for faults 0321A9 (hardware inconsistent) and 0321AA (software inconsistent).
2. Communication Restoration: The primary goal is to re-establish communication with the charge socket. This must be achieved before any programming attempts.
3. Component Checks: Technicians will inspect various components and connections, including:
   • The charging socket electronics for defects or incorrect part numbers.
   • The charging socket fuse for continuity.
   • The 12V power supply and ground connections at the charging socket.
   • The harness between the CCU and the charge socket.
   • The CCU CAN communication for faults.
   • PINs at the harness 12V connectors for the CCU or charge socket.
   • The CCU power supply, fuse, and grounds.
   • The CCU itself for internal faults.
4. SA 8WN Retrofit: For Gen 5 BEV vehicles produced starting 03/2023, a unified charging socket was introduced. If the high-voltage charging socket is replaced on these vehicles, a "Conversion charging socket with alternative microprocessor (SA 8WN)" may be required. For vehicles without SA 8WN, this option must be installed via the "Vehicle Order" in ISTA using the "Conversion to charging socket with alternative microprocessor" button. This ensures the correct coding file (SWFK) is computed and stored in the CCU.
5. CCU Recovery: Once communication is re-established and all faults can be cleared, the CCU can be recovered.

If, after performing all checks and following test plans, the communication issue persists, a TSARA case titled "Charge Socket Communication/Programming Abort" should be submitted for further assistance.

Owner Action

If your 2022-2024 BMW BEV or PHEV vehicle is experiencing a "programming abort" or any related charging system faults, it is essential to have it inspected by an authorized BMW service center. Due to the high-voltage nature of the components and the specialized diagnostic and repair procedures, this is not a DIY repair. The repair will typically be covered under the BMW New Vehicle Limited Warranty if it addresses verified defects in materials and/or workmanship.

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Source: NHTSA ID 10250365