2021-2025 Audi eCall System Fault DTC B200000 TSB

Symptoms of an eCall System Malfunction

Owners of affected 2021-2025 Audi vehicles may notice a critical warning message appearing in their instrument cluster. This message, displayed verbatim, states: "Emergency call function: malfunction! Function unavailable. Please contact service". Alongside this, the eCall LED may illuminate red, indicating a problem with the vehicle's emergency call system. This condition directly relates to the Audi e-tron eCall fault and similar issues across various Audi models.

Diagnostic Trouble Codes (DTCs)

When diagnosing this issue, technicians will typically find a specific Diagnostic Trouble Code (DTC) stored in the Emergency Call Module and Communication Unit (ConBox), identified as J949 (address word 0075).

Code	Description	Condition	Module
B200000	Ctrl. Module Faulty	Active / Static	Emergency Call Module and Communication Unit (ConBox, J949)

This DTC B200000 indicates that the control module itself is reporting a fault.

Technical Background

Audi has identified that the primary cause of this eCall system malfunction and the associated DTC B200000 is a software issue. The DTC is often stored "without a good reason," meaning the hardware itself may not be defective, but the software incorrectly flags a fault within the Emergency Call Module and Communication Unit (ConBox). This understanding is crucial for addressing the Audi e-tron eCall fault effectively.

Repair Procedure Summary

The resolution for the eCall system malfunction involves a software optimization for the Emergency Call Module and Communication Unit (ConBox). This fix has been incorporated into production vehicles since Calendar Week 29 of 2024. For vehicles already on the road, the service procedure is divided into two parts:

Part 1: Initial Diagnostic and Software Check

1. ODIS Version Requirement: Ensure that the diagnostic system, ODIS, is updated to a minimum version of 2024.04.00 or newer.
2. Guided Fault Finding: Access the test plan and perform the program "J949 – Control Module for Emergency Call Module and Communication Unit, check control module." This program is automatically triggered when DTC B200000 is logged. Alternatively, technicians can manually navigate to this function via ODIS: Self-test >> Diagnostic capable systems >> 0075 – Control Module for Emergency Call Module and Communication Unit -J949- >> 0075 – Electrical components >> Control Module for Emergency Call Module and Communication Unit, check control module.
3. Verification: After running the program, check if the DTC B200000 has been erased and if the "Emergency call function: malfunction!" message has disappeared from the instrument cluster. If the message persists, repeat step 1.

Part 2: Further Action Based on Model Year

• For 2020 and 2021 Model Year Vehicles: A specific software package has been developed to address multiple complaints across a group of control units. This comprehensive update is detailed in Cluster 35 service update TSB 2067021 (for MY 2020) or recall 91DZ (for MY 2021). Technicians should refer to these documents for instructions on distributing and applying this software package.
• For 2022, 2023, 2024, and 2025 Model Year Vehicles: If the issue persists after Part 1, technicians should perform Guided Fault Finding for any stored DTCs to identify further steps.

Important Warranty Information

Audi specifies that Part 1 of this service, which involves the initial diagnostic and software check described in TSB 2059528/12, should be invoiced directly under this bulletin. However, Part 2 of the repair, if required, must be invoiced via the applicable TSB or recall notice specific to that part (e.g., TSB 2067021 or recall 91DZ for earlier model years).

It is important to note that if your vehicle is outside of its warranty period, this Technical Service Bulletin is provided for informational purposes only, and the repair may not be covered.

Warranty Claim Details

For warranty claims related to Part 1 of this service, the following details apply:

• Claim Type: If the vehicle is outside of any warranty, this TSB is informational only.
• Service Number: 9145
• Damage Code: 0039
• Labor Operations:
  • GFF: 0150 0010 (See SRT with associated operations)
  • GFF: 0150 0060 (Labor according to diagnostic log)
• Claim Comment: As per TSB 2059528/11

All warranty claims must adhere to the Audi Warranty Policies and Procedures Manual and are subject to review.

Additional Information

All part and service references within this TSB (2059528) are subject to change. Always consult with your Audi Parts Department and/or ETKA for the most current information and bulletins. Additionally, refer to the Repair Manual for any fasteners, bolts, nuts, and screws that require replacement during the repair process. This ensures the correct resolution for the Audi e-tron eCall fault.

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Source: NHTSA ID: 11007266