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2016-2026 Audi e-call LED Not Green TSB 2079652

This Technical Service Bulletin (TSB) 2079652/2 details diagnostic and repair procedures for 2016-2026 Audi vehicles where the emergency call LED in the roof module is not lit up green. It covers various scenarios, from eCall system status to communication errors, and outlines specific service…

Byeditor sarah mitchell2022 Audi e-tron
2022 Audi e-tron — manufacturer_communication document image 1
Source: NHTSA manufacturer_communication 11027368
2079652/22079652/1emergency call LED in roof module not lit up in greene-callemergency call module J949data bus diagnostic interface J533control unit for information electronics J79491 Audi connect GEN3/GEN4: No Services in MMI and SOS LED does not go green after PDIA0399170
Audi A3
2022–2026
Audi A4
2021–2025
Audi A4 allroad
2021–2025
Audi A5
2021–2024
Audi A6
2021–2025
Audi A6 allroad
2021–2026
30 tane daha göster
Audi A7
2021–2025
Audi A7 e
2021–2022
Audi A8 L e
2021
Audi e-tron
2021, 2023
Audi e-tron GT
2022–2026
Audi e-tron Sportback
2021–2022
Audi Q3
2021–2025
Audi Q5
2021–2025
Audi Q5 e
2021, 2023, 2024, 2025
Audi Q7
2021–2026
Audi Q8
2021–2026
Audi R8
2021–2023
Audi RS 3
2022–2026
Audi RS 5
2021–2024
Audi RS 6 Avant
2021–2026
Audi RS 7
2021–2026
Audi RS e-tron GT
2022–2026
Audi RS Q8
2021–2026
Audi S3
2022–2026
Audi S4
2021–2025
Audi S5
2021–2024
Audi S6
2021–2025
Audi S7
2021–2025
Audi S8
2021–2026
Audi SQ5
2021–2025
Audi SQ7
2021–2026
Audi SQ8
2021–2026
Audi TT
2021–2023
Audi TT RS
2021–2022
Audi TTS
2021–2023

Symptoms

Owners of 2016-2026 Audi vehicles equipped with e-call functionality may observe that the "emergency call LED in roof module not lit up in green". This indicates a potential issue with the vehicle's eCall system, which is designed to automatically contact emergency services. The LED should typically illuminate green to confirm the system is active and ready.

Revision History

This Technical Service Bulletin (TSB) 2079652/2 is a revision of a previously issued document. The initial publication, Revision 1, was released on October 14, 2025. This current Revision 2, released on December 11, 2025, includes updates to the Condition section, an added model table, revised warranty information, and updated service verbiage.

Important Warnings

Diagnosis and Trigger Conditions

To diagnose why the "Audi e-call LED not green" condition is present, technicians should first move the vehicle into an open-air location to ensure adequate GPS and mobile phone reception. After switching on the ignition, they must wait at least 30 seconds before evaluating the emergency call LED in the roof module based on its feedback pattern. The TSB outlines several scenarios:

eCall (emergency call) Status

Fall LED Feedback Status
1 Red, Green, Red, Green eCall ongoing
2 Red, Red, Red, Red eCall disabled
3 Red, Green, Red, Green Predelivery state
4 Red, Red, Red, Red Error
5 Red, Green, Red, Green eCall not available
6 Green, Green, Green, Green eCall available
Timing 0.5s, 0.5s, 0.5s, 0.5s, 0.5s, 0.5s, 0.5s, 0.5s, 0.5s, 0.5s, 0.5s, 0.5s, 0.5s, 0.5s, 0.5s

Each

Frequently Asked Questions

What does 'emergency call LED in roof module not lit up in green' mean?
This message indicates a potential issue with your Audi's eCall system, which is designed to automatically contact emergency services in case of a crash. The LED should normally be green to show the system is available and functioning correctly.
How will a technician diagnose the Audi e-call LED not green issue?
As per TSB 2079652/2, technicians will assess the LED's behavior after ensuring good GPS and mobile reception. They will follow a diagnostic chart based on the LED's flashing pattern to determine if the eCall system is ongoing, disabled, in a pre-delivery state, or has an error. Further steps involve checking for IT errors, relevant TSBs, privacy settings, and performing module restarts.
Is the repair for the Audi e-call LED not green covered under warranty?
Warranty coverage for the Audi e-call LED not green issue depends on the vehicle's warranty status and the root cause of the problem. Technical Service Bulletin 2079652/2 outlines specific service numbers for invoicing, differentiating between issues caused by vehicle technology and external factors like network problems. If your vehicle is outside of warranty, the bulletin serves as informational guidance for repairs.
What is the purpose of TSB 2079652/2?
TSB 2079652/2 provides Audi technicians with a comprehensive guide to diagnose and resolve instances where the emergency call LED in the roof module of 2016-2026 Audi vehicles is not lit green. It details diagnostic scenarios, repair procedures like control unit restarts and backend registrations, and specific warranty claim instructions to ensure proper resolution of the eCall system fault.

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