2022-2024 Audi e-tron eCall Fault with DTC B200000

Owners of 2022-2024 Audi e-tron and other Audi models may encounter a dashboard warning message and a red eCall LED. This issue is addressed by Audi Technical Service Bulletin (TSB) 2059528/11, which supersedes TSB 24-23 dated June 28, 2024. The TSB clarifies that the underlying cause is a software issue within the vehicle's Emergency Call Module and Communication Unit, commonly known as the ConBox.

Symptoms

Drivers will observe a specific warning message displayed in the instrument cluster. This message indicates a problem with the vehicle's emergency call system.

• "Emergency call function: malfunction! Function unavailable. Please contact service"
• A red eCall LED indicator

Fault Codes / DTCs

When scanned, the vehicle's onboard diagnostic system will typically store a specific Diagnostic Trouble Code (DTC) related to the ConBox.

• DTC B200000: Ctrl. Module Faulty. (active / static)

This DTC is stored in the Emergency Call Module and Communication Unit (J949), which is identified by address word 0075.

Diagnosis / Trigger Conditions

The TSB explains that the DTC B200000 is often stored without a genuine hardware fault. Instead, it is a software issue where the ConBox incorrectly detects a malfunction. The conditions for setting this DTC have been optimized with new software versions deployed since calendar week 29 of 2024.

Repair Procedure Summary

The repair for the Audi e-tron eCall fault involves a two-part process performed by an authorized Audi service technician. The technician must ensure they are using the most current ODIS Version, with a minimum requirement of > 2024.04.00.

Part 1: Initial Diagnostic and Check

1. The technician will perform the diagnostic program "J949 – Control Module for Emergency Call Module and Communication Unit, check control module." This program is automatically integrated into the test plan when DTC B200000 is logged.
2. This function can also be accessed manually 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. After running the program, the technician will check if the DTC has cleared and the warning message has disappeared from the instrument cluster. If the message persists, Part 1 must be repeated.

Part 2: Software Update or Guided Fault Finding

• For 2020 and 2021 Model Year Vehicles: A comprehensive software package has been developed to address multiple complaints across several control units. This package is detailed in "Cluster 35 service update TSB 2067021 (MY 2020)" or "recall 91DZ (MY 2021)".
• For 2022, 2023, and 2024 Model Year Vehicles: Technicians will perform Guided Fault Finding for any stored DTCs to resolve the Audi e-tron eCall fault.

This TSB, identified as 2059528/11, outlines the steps for addressing this specific eCall system issue.

Required Tools or Parts

Technicians must use the latest version of the ODIS diagnostic software, specifically ODIS Version > 2024.04.00, to perform the necessary diagnostic and programming steps.

Important Warnings

If the vehicle is outside of its warranty period, this Technical Service Bulletin is for informational purposes only. Owners should be aware that warranty claims must adhere to the Audi Warranty Policies and Procedures Manual.

Owner Action

If your 2022-2024 Audi e-tron displays the "Emergency call function: malfunction! Function unavailable. Please contact service" warning or a red eCall LED, it is recommended to schedule an appointment with an authorized Audi service center. Provide them with the symptom description and mention the Audi Technical Service Bulletin 2059528/11 to help expedite the diagnostic and repair process.

NHTSA ID: 11005933