2016-2026 Audi eCall LED Not Green TSB 2079652/1

Owners of 2016-2026 Audi vehicles may encounter a situation where the emergency call LED in the roof module fails to illuminate green. This indicates a potential malfunction within the eCall system, which is crucial for automatic and manual emergency assistance. This technical service bulletin, TSB 2079652/1, outlines the diagnostic and repair process for technicians to resolve the "Audi e-tron emergency call LED not green" issue. This bulletin was released on October 14, 2025.

The problem can manifest in several ways, including the manual emergency call function being inoperative, interference display symbols for the emergency call service, or the automatic online roadside assistance call not functioning. This document provides comprehensive guidance for addressing these concerns.

Symptoms: When Your Audi's eCall LED Isn't Green

The primary symptom addressed by TSB 2079652/1 is the "emergency call LED in roof module not lit up in green." This visual indicator is designed to confirm the operational status of your vehicle's eCall system. When it's not green, it suggests a problem with the system's ability to perform its core functions. This can include:

• The manual online emergency call functionality being unavailable, reported as "information, navigation, communication, entertainment -> Online Services -> manual emergency call -> manual online emergency call" with a complaint type of "functionality -> no function."
• Malfunction display symbols appearing, indicating "interference display for emergency call service" with a complaint type of "functionality -> activates."
• The automatic online roadside assistance call functionality failing to activate, reported as "information, navigation, communication, entertainment -> Online Services -> automatic emergency call -> automatic online roadside assistance call" with a complaint type of "functionality -> no function."
• The manual online roadside assistance call functionality also being unavailable, reported as "information, navigation, communication, entertainment -> Online Services -> manual emergency call -> manual online roadside assistance call" with a complaint type of "functionality -> no function."
• The automatic online emergency call functionality being unavailable, reported as "information, navigation, communication, entertainment -> Online Services -> automatic emergency call -> automatic online emergency call" with a complaint type of "functionality -> no function."
• Issues with online services automatic configuration, reported as "information, navigation, communication, entertainment -> Online Services -> Online Services configuration -> Online Services automatic configuration" with a complaint type of "functionality -> not set."

These symptoms collectively point to a potential failure of the eCall system to provide critical safety and assistance features, impacting the "Audi e-tron emergency call LED not green" status.

Initial Diagnosis: eCall Status Scenarios

Initial diagnosis for the "Audi e-tron emergency call LED not green" problem begins with ensuring optimal conditions for the eCall system. Technicians should move the vehicle to an open-air location to ensure adequate GPS and mobile phone reception. The ignition must then be switched on, and the vehicle allowed to sit for at least 30 seconds before evaluating the eCall LED feedback. The TSB details specific LED flash patterns and their corresponding eCall statuses:

• Scenario 1 (eCall ongoing): The eCall LED shows a continuous green light (G-G-G-G-G-G). This indicates that eCall is active and an emergency call is currently being made.
• Scenario 2 (eCall disabled): The eCall LED shows a continuous red light (R-R-R-R-R-R). This means eCall is deactivated. Technicians should perform general test steps. If the LED remains flashing red, Product Support must be contacted via reporting obligation 2063936.
• Scenario 3 (Predelivery state): The eCall LED shows a continuous red light (R-R-R-R-R-R). This indicates the vehicle is in transport mode. A pre-delivery inspection (PDI) is required. If the LED still flashes red after the "Establish readiness for sending and receiving information" routine, general test steps should be performed. If it persists, contact TAC.
• Scenario 4 (Error): The eCall LED shows an alternating red and green light (R-G-R-G-R-G). This signifies that eCall is not available due to a control unit communication interruption or the LED not activating. A relevant event memory entry will be found in the data bus diagnostic interface J533 or the emergency call module J949. Technicians should work through this entry using Guided Fault Finding.
• Scenario 5 (eCall not available): The eCall LED shows a continuous red light (R-R-R-R-R-R). Similar to Scenario 4, eCall is not available due to a control unit communication interruption or the LED not activating. A relevant event memory entry will be present in the data bus diagnostic interface J533 or the emergency call module J949.
• Scenario 6 (eCall available): The eCall LED shows a continuous green light (G-G-G-G-G-G). This is the target status, indicating eCall is fully functional.

General Test Steps and Further Diagnostics

If the eCall LED still does not light up green after the initial assessment, technicians should proceed with further diagnostic steps:

• Check for IT Errors: Look for any IT errors or disturbances under the "Breaking News" tab in the service portlet. If an IT error is present, consult the Customer Information Portal (CIP) for outage information. If multiple vehicles are affected without an IT error, contact Audi Digital Business Support (DBS).
• Review Other TSBs: If no IT error is found, check for other relevant TSBs, product information, or software updates related to online services, the data bus diagnostic interface J533, or the emergency call module J949. Any software updates for J533, J949, or information electronics J794 should be performed.
• Privacy Settings: Verify if the vehicle's privacy settings are active. If they are, deactivate them and then put the vehicle into bus sleep mode. Re-check the LED status after switching on the ignition.
• Emergency Call Module Restart: If the LED is still not green, perform a restart of the emergency call module using the "Control module restart" routine. Instructions for this are found under "Emergency call module restart" in the workshop manual.
• Refer to Related Service Information: Technicians should also consult service information TSB 2061028, titled "91 Audi connect GEN3/GEN4: No Services in MMI and SOS LED does not turn green after PDI," for additional guidance.

Critical Warning: Emergency Call Module Restart

Repair Procedure Summary

To restart the emergency call module, technicians should follow these steps:

1. ODIS Control Unit Restart: First, restart the control unit via ODIS. Navigate in the test plan to: "Select own tests > Diagnostic capable system > 0075 – Emergency call module – J949 > 0075 - Emergency call module, functions > 0075 – Control module restart." After performing the restart, reassess the complaint.
2. Terminal 30 Reset: If the complaint persists after the ODIS restart, reset terminal 30 by disconnecting the 12V vehicle battery. Detailed instructions for this procedure can be found in the Workshop Manual.
3. New Vehicle Registration in Backend: If the terminal 30 reset does not resolve the issue, a new vehicle registration can be initiated in the backend. This is done through the service portlet by pressing the "Reset control unit in backend" button under the "Vehicle communication" tab. After this, switch the ignition on and check the LED.
4. Vehicle Data Synchronization: If the control unit has already been replaced, technicians should press the "Vehicle data synchronization for backend" button under the "Vehicle data" tab in the service portlet.

If the problem remains unresolved despite these steps, technicians should read out all measured values from the emergency call module (diagnostic address 0075) and contact Technical Assistance Center (TAC) for further support.

Affected Components and Control Units

Several control units and components are involved in the eCall system and may be implicated in the "Audi e-tron emergency call LED not green" issue:

• Data bus diagnostic interface J533
• Emergency call module J949 (Diagnostic address 0075)
• Information electronics J794
• Aerial module 8107
• Diagnostic address 0019 (System designation: Gateway)

Specific components are also identified for service billing:

| Service number | Component ```

Technical Background and Production Solution

This TSB indicates that there is no specific technical background or production solution applicable to this issue. This suggests that the problem is not due to a manufacturing defect or known design flaw but rather a potential configuration or software issue that can be resolved through diagnostic and service procedures.

Critical Warnings for Owners

While the TSB is primarily for technicians, owners should be aware of the following:

• Warranty: If your vehicle is outside of any warranty, this Technical Service Bulletin is informational only, meaning repairs may not be covered by the manufacturer.
• Parts and Service References: All part and service references provided in this TSB (2079652/1) are subject to change and/or removal. Always check with your Parts Department and/or ETKA for the latest information and parts bulletins.

Warranty and Service Billing

When billing for work performed under this TSB, the correct service number and damage code must be selected according to the specific situation. The following guidelines apply:

• Service Number 9107: This service number is reserved for technical causes outside the vehicle (e.g., mobile network or backend issues) and may not be used to invoice replacement of parts. It is also used for work performed on the vehicle due to an issue not caused by vehicle technology, such as a terminal 30 reset based on repair queries.
• Service Numbers 9145, 9170, or 9035: These numbers should be used for invoicing if a component was determined to be the cause of the complaint. This is confirmed by a relevant event memory entry in the data bus diagnostic interface J533 or emergency call module J949, or if J949 or J533 had to be replaced.

Damage Code

A new damage code, A039 = emergency call LED not green, has been created specifically for this complaint. This code does not apply to service number 9035.

Service Number / Damage Code Combinations for Invoicing

| Service number / damage code | Explanation ```

Technical Background and Production Solution

This TSB indicates that there is no specific technical background or production solution applicable to this issue. This suggests that the problem is not due to a manufacturing defect or known design flaw but rather a potential configuration or software issue that can be resolved through diagnostic and service procedures.

Critical Warnings for Owners

While the TSB is primarily for technicians, owners should be aware of the following:

• Warranty: If your vehicle is outside of any warranty, this Technical Service Bulletin is informational only, meaning repairs may not be covered by the manufacturer.
• Parts and Service References: All part and service references provided in this TSB (2079652/1) are subject to change and/or removal. Always check with your Parts Department and/or ETKA for the latest information and parts bulletins.

Warranty and Service Billing

When billing for work performed under this TSB, the correct service number and damage code must be selected according to the specific situation. The following guidelines apply:

• Service Number 9107: This service number is reserved for technical causes outside the vehicle (e.g., mobile network or backend issues) and may not be used to invoice replacement of parts. It is also used for work performed on the vehicle due to an issue not caused by vehicle technology, such as a terminal 30 reset based on repair queries.
• Service Numbers 9145, 9170, or 9035: These numbers should be used for invoicing if a component was determined to be the cause of the complaint. This is confirmed by a relevant event memory entry in the data bus diagnostic interface J533 or emergency call module J949, or if J949 or J533 had to be replaced.

Damage Code

A new damage code, A039 = emergency call LED not green, has been created specifically for this complaint. This code does not apply to service number 9035.

Service Number / Damage Code Combinations for Invoicing

| Service number / damage code | Explanation ```

Technical Background and Production Solution

This TSB indicates that there is not a specific technical background or production solution applicable to this issue. This suggests that the problem is not due to a manufacturing defect or known design flaw but rather a potential configuration or software issue that can be resolved through diagnostic and service procedures.

Critical Warnings for Owners

While the TSB is primarily for technicians, owners should be aware of the following:

• Warranty: If your vehicle is outside of any warranty, this Technical Service Bulletin is informational only, meaning repairs may not be covered by the manufacturer.
• Parts and Service References: All part and service references provided in this TSB (2079652/1) are subject to change and/or removal. Always check with your Parts Department and/or ETKA for the latest information and parts bulletins.

Warranty and Service Billing

When billing for work performed under this TSB, the correct service number and damage code must be selected according to the specific situation. The following guidelines apply:

• Service Number 9107: This service number is reserved for technical causes outside the vehicle (e.g., mobile network or backend issues) and may not be used to invoice replacement of parts. It is also used for work performed on the vehicle due to an issue not caused by vehicle technology, such as a terminal 30 reset based on repair queries.
• Service Numbers 9145, 9170, or 9035: These numbers should be used for invoicing if a component was determined to be the cause of the complaint. This is confirmed by a relevant event memory entry in the data bus diagnostic interface J533 or emergency call module J949, or if J949 or J533 had to be replaced.

Damage Code

A new damage code, A039 = emergency call LED not green, has been created specifically for this complaint. This code does not apply to service number 9035.

Service Number / Damage Code Combinations for Invoicing

| Service number / damage code | Explanation ```

Technical Background and Production Solution

This TSB indicates that there is not a specific technical background or production solution applicable to this issue. This suggests that the problem is not due to a manufacturing defect or known design flaw but rather a potential configuration or software issue that can be resolved through diagnostic and service procedures.

Critical Warnings for Owners

While the TSB is primarily for technicians, owners should be aware of the following:

• Warranty: If your vehicle is outside of any warranty, this Technical Service Bulletin is informational only, meaning repairs may not be covered by the manufacturer.
• Parts and Service References: All part and service references provided in this TSB (2079652/1) are subject to change and/or removal. Always check with your Parts Department and/or ETKA for the latest information and parts bulletins.

Warranty and Service Billing

When billing for work performed under this TSB, the correct service number and damage code must be selected according to the specific situation. The following guidelines apply:

• Service Number 9107: This service number is reserved for technical causes outside the vehicle (e.g., mobile network or backend issues) and may not be used to invoice replacement of parts. It is also used for work performed on the vehicle due to an issue not caused by vehicle technology, such as a terminal 30 reset based on repair queries.
• Service Numbers 9145, 9170, or 9035: These numbers should be used for invoicing if a component was determined to be the cause of the complaint. This is confirmed by a relevant event memory entry in the data bus diagnostic interface J533 or emergency call module J949, or if J949 or J533 had to be replaced.

Damage Code

A new damage code, A039 = emergency call LED not green, has been created specifically for this complaint. This code does not apply to service number 9035.

Service Number / Damage Code Combinations for Invoicing

Service number / damage code	Explanation
9113/0040	When an event memory entry on the GPS aerial was logged in emergency call module J949 or data bus diagnostic interface J533
9138/0040	When an event memory entry on the aerial was logged in emergency call module J949 or data bus diagnostic interface J533 or aerial module 8107
9156/0040	When an event memory entry on the loudspeaker for telephone was logged in emergency call module J949
9157/0040	When an event memory entry for the microphone is logged in emergency call module J949 or information electronics J794
9178/0040	When an event memory entry for the emergency battery for telematics is logged in emergency call module J949
9107/A039	For work performed on vehicle due to issue not caused by vehicle technology
9145/A039	When an event memory entry was logged in emergency call module J949 or emergency call module has been replaced, and system designation is "ConBox" or "CB_H_"
9170/A039	When an event memory entry was logged in emergency call module J949 or emergency call module has been replaced, and system designation includes "OCU"
9035/0039	When an event memory entry was logged in data bus diagnostic interface J533 or data bus diagnostic interface J533 was replaced

Labor Operations

Specific labor operations and time units are defined for various scenarios:

Labor Operations	Operation Code	Time Units (TU)	Billing Instruction
Scenario 2
Check online services	9170 0199		Please bill according to the time required
Check vehicle (bus sleep mode)	0689 0199	10 TU
Pre-delivery inspection	0101 00xx		See SRT with associated operations
Scenario 3
Check online services	9170 0199		Please bill according to the time required
Check vehicle (bus sleep mode)	0689 0199	10 TU
Scenario 3a
Check online services	9170 0199		Please bill according to the time required
GFF / Guided Functions	0150 0060		Labor according to the diagnostic log
Scenario 3b
Remove and install/replace telematics control unit	9170 19xx / 9170 55xx		See SRT with associated operations
Check vehicle (bus sleep mode)	0689 0199	10 TU

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

Important Considerations

It is important to note that information regarding predecessors and items included or excluded in repair operations, as well as any associated tasks, should be carefully reviewed. All part and service references provided in this TSB (2079652/1) are subject to change or removal. Technicians should always verify the latest information and part bulletins with the Parts Department and/or ETKA.

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Source: NHTSA ID: 10248232