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Technical Service Bulletin Transaction No.: 2077819/4
90 Software update: gateway - various warning lamps for different vehicle systems light Release date: Apr 30, 2026
up in instrument cluster
Condition
| modes) | Years) | VIN Range Vehicle Specific Equipment
Without PR Code:
#4X
0019 Databus OBD
# version | Partnumber | Version
Q7, SQ7, Q8, SQ8, | 4993 _ 2095
and RS Q8
4KR907468Q 0042 4KR907468L HO6
4KR907468M 4KR907468L
4KE907468Q 0042 4KE907468L
4KR907468M 4KR907468L
4KL907468R 0043 4KL907468L
4KL907468M 0025 4KL907468L
4KR907468N 3039 4KR907468L
Q8 e-tron, Q8 All
$Q8 e-tron, and SQ8 2024 4KL907468M 0027 4KL907468L HO6
Sportback e-tron 4KE907468N | 3039 | 4KE907468L
4KR907468R 4KR907468L
4KE907468T 4KE907468L
4KR907468T 4KR907468L
4KE907468M 0025 4KE907468L
A6, A6 allroad, S6,
RS 6 Avant, A7, S7, | 2024 - 2025 4KE907468M 0027 4KE907468L HO6
RS 7, A8, and S8&
4KL907468Q 0042 4KL907468L
4KL907468T 4KL907468L
4KL907468N 3039 4KL907468L

| modes) | Yearts) _| VIN Range Vehicle Specific Equipment
Without PR Code:
#4X
0019 - Data Bus OBD Interface
ertron GT, and RS €- | 5994 _ 2025 All Software Part | Software Hardware | Hardware
tron GT . is
# version Part number | Version
4KR907468Q 0042 4KR907468L
4KL907468Q 0042 4KL907468L
Without PR Codes :
FKO
A5, A5 Cabriolet, S5, 9mo
S5 Cabriolet, and RS 2024 KAO
6 TYO
#4X
0019 — Data Bus OBD Interface
Software Part | Software Hardware Hardware
All # version Part number | Version
A4, A4 allroad, S4,
Sportback, RS 5
Sportback, Q5, Q5 e | 2024 — 2025 socso7468r | 0043 | socg07468L
quattro, Q5
$Q5 Sportback swos07468a | 0042 | swoso746sL | _Ho6
80C907468Q 0042 80C907468L
80C907468N 3039 80C907468L
REVISION HISTORY
Revision [owe pumose
4 Revised header (Added Models, Updated software)
Revised Condition (Added model table)

2 08/01/2025 | Revised header (Updated control units)
Revised Condition (Added DTC list)
Revised Service (updated SW number, and SVM Code)

Customer states:

Various warning lamps for different vehicle systems appear after opening and starting the vehicle or while driving.

For example:

+ Vehicle lights: fault.

+ Emergency call function: fault.

+ Start/stop system: fault.

+ Stabilization control (ESC): fault.

+ etc.

are displayed in the driver information system.

Various warning lamps are active, and the side windows may lower automatically.

Workshop findings:

+ Various DTC entries on different bus systems are logged (intermittent) in diagnosis address 0019 due toa
single occurrence of the event memory entry.

AND

+ Intermittent faults in CAN and FlexRay communication are logged in some control units and the diagnostic
interface. All symptoms and DTC entries indicate a temporary failure of the gateway J533. The DTC entries
can vary.

As the ODIS DTC entries, and warning messages can vary in suspected cases, no fault codes can be specified.

When classifying the issue, the important factor is the identical time stamp in the standard ambient conditions of the

respective event memory entry in DA0019. Most of these are communication, single-wire and signal faults (e.g.

implausible signal; CAN single wire mode; no communication or function limitation due to missing message).

oor DTCs may be stored in the event memory of the data bus diagnostic interface J533 (address word

+ U12FB00: Instrument cluster data bus 1-wire mode

+ U007200: Infotainment CAN 1-wire mode

+ U005400: Extended CAN single wire mode

+ _U001100: Medium Speed CAN Communication Bus Performance

+ _U10AB00: Instrument Cluster CAN data bus no communication.

+ ete.

DTC memory entry
Number U12FB00: Instrument cluster data bus 1-wire mode
Error type 2: passive/sporadic
Symptom: 65794
Status: 00001000
& Standard ambient conditions:
Date 417/25
Time: 4:39:18 PM
Mileage (DTC) 9589
Priority: 4
Frequency counter: 1
Elimination counter / driving cycle: 64
[-]Expanded ambient conditions:
DTC memory entry
Number: U007200: Vehicle Communication Bus E (-) shorted to Bus E (+)
Error type 2: passive/sporadic
Symptom: 65796
Status: 00001000
| Standard ambient conditions:
Date 47/25
Time: 4:39:18 PM
Mileage (DTC): 9589
Priority: 4
Frequency counter: 1
Elimination counter / driving cycle: 64
[EJExpanded ambient conditions:
DTC memory entry
Number U001100: Medium Speed CAN Communication Bus Performance
Error type 2: passive/sporadic
Symptom: 66049
Status: 00001000
E)standard ambient conditions:
Date 4l7I25
Time: 4:39:00 PM
Mileage (DTC): 9589
Priority: 4
Frequency counter: 1
Elimination counter / driving cycle: 64
Figure 1. Sample CAN bus and communication DTC stored at the same time stamp (DTCs stored can vary).
The complaint cannot be reproduced in the workshop. All systems continue to function without restrictions.
Technical Background
Under certain circumstances, an online data campaign may be causing a sporadic reset of data bus diagnostic
interface J533. This campaign already ended in week 38/2024. However, individual vehicles with this complaint still
come up.
The data bus diagnostic interface remains stuck for approx. 30 seconds and then fixes itself automatically with an
automatic reset.
Production Solution
Robustness measure in the software for the data bus diagnostic interface (diagnostic address 0019) as of week
25/2025 (MY26).
Service
This TSB replaces TSB 2075405: 90 Reporting Obligation pre repair - Various Warning Messages w/ Faults stored
for CAN bus Communication.
Software update to SW 0052 for the diagnostic interface control unit (DA0019).
Applies to vehicles with high-voltage components:

To prevent the high-voltage battery from charging during the software update, the high-voltage charging cable on
vehicles with high-voltage components must be unplugged BEFORE the SVM code is entered.
Please note that charging the high-voltage battery during a software update can cause damage to the high-voltage
components.
The software for the diagnostic interface must be updated on this vehicle. Please observe the information
and instructions under “Customer information” regarding this.
Follow all instructions in TSB 2011732: 00 Software Version Management (SVM), operating instructions.
Update the Data Bus On Board Diagnostic interface, J533 (0019) using the SVM action code as listed below if
necessary:
Please update the data bus diagnostic interface J533 (diagnostic address 0019) via SVM. To enter the SVM code,
use “Flash” mode on the ODIS tester.
Please use the function Authorized Multiple Code Entry. The new test program for software updates is included in
ODIS software (available as of 16.04.2025).
Note: The vehicle uses acoustic signals and flashing lights to indicate when user input is required during and at the
end of the test program.
Use the function “SVM — Authorized Multiple Code Entry’ in “Flash” mode.
CAUTION: the following SVM code must be input exactly as written below (incl. commas and without spaces;
copying and pasting is recommended):
ZGDOIP,19A027,19B027
Follow the instructions on the ODIS tester.
After the update has been completed, it is absolutely necessary to unplug the diagnostic connector and the charger
from the vehicle.
Now start the engine and let it run for a minute, then lock the vehicle and wait for five minutes.
Once you have done this, you can finish the diagnostic procedure via ODIS so that the event memory entries
created during the flashing procedure can be deleted.
Warranty
Claim Type: + Ifthe vehicle is outside of any warranty, this Technical Service Bulletin is
informational only.
Damage Code: 0039
Labor Operations: Software Update 01510010 |See SRT with
associated operations
Software Update 0151 0060 | Time stated on the
diagnostic protocol
Claim Comment: As per TSB 2077819/4
All warranty claims submitted for payment must be in accordance with the Audi Warranty Policies and Procedures
Manual. Claims are subject to review or audit by Audi Warranty.

Please note the information on predecessors and items that are included and excluded in the repair operations, as
well as any associated tasks.

Additional Information

The control unit software must be updated on this vehicle, or the software must be updated on several control units
in this vehicle to ensure they function correctly in conjunction with the other control units in the vehicle. Inform the
customer about the software update and ask them whether the software has been modified, or “tuned” (e.g. chip
tuning or retrofitting involving modifications to a third party). Explain to the customer that updating software renders
the modification(s) ineffective. In certain circumstances, the control unit may even be damaged by third party
software update(s). Please inform the customer that this software update may neutralize previous modification(s) to
the vehicle’s software performed by either the customer or other third parties.

Damage to the control unit(s) resulting from chip tuning is not covered under warranty. Please refer the customer to
the Warranty and Maintenance booklet to learn more about how modification(s) can impact warranty coverage.
Explain to the customer that if they “tuned” their vehicle, they will be responsible for any damage caused by the
software update or for damage that occurs as the result of not having the update performed. If the customer
declines the software update, please inform them that this could lead to issues or restrictions with the use of the
vehicle or individual components. Make a note to this effect on the order before it is signed by the customer. Include
this information in the customer file.

All part and service references provided in this TSB (2077819) are subject to change and/or removal. Always check
with your Parts Department and/or ETKA for the latest information and parts bulletins. Please check the Repair
Manual for fasteners, bolts, nuts, and screws that require replacement during the repair.

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