Technical Service Bulletin
91 No diagnostics communication to the telematics control module; DTC U142100
91 23 08 2056076/18 June 29, 2023. Supersedes Technical Service Bulletin Group 91 number 23-04 dated June
12, 2023, for reasons listed below.
Model(s)

Year

A4, A4 allroad,
S4, A5, A5
Cabriolet, A5
Sportback, S5,
S5 Cabriolet, S5
Sportback, RS 5,
RS 5 Sportback,
and e-tron
quattro

2019

VIN Range

Vehicle-Specific Equipment

All

ConBox Low

A6, A7, A8, Q5,
2019 – 2020
SQ5, Q7, and Q8
A6 allroad, S6,
S7, A8 e quattro,
S8, e-tron
Sportback, Q5 e
quattro, SQ7,
SQ8, and RS Q8

2020

Condition
REVISION HISTORY
Revision

Date

Purpose

18

-

Revised header (added DTC codes)

17

06/08/2023

Revised header (updated software filter)
Revised Condition (added criterions)
Revised Service (added software update)

16

09/23/2022

Revised Warranty (Update Service Number)

Page 1 of 7
© 2023 Audi of America, Inc.
All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and other intellectual property rights
of Audi of America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any time without notice. No part of this document may be reproduced, stored in a
retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, nor may these materials be modified or reposted to other sites, without
the prior expressed written permission of the publisher.

Technical Service Bulletin
Customer states:
• An SOS Warning might be displayed in the
instrument cluster (Figure 1).

Figure 1. Emergency call malfunction warning.
Or
• Connectivity features like remote locking and unlocking are not working.
Or
• No diagnostics communication can be established to the control module for the emergency call module and
communication unit (telematics control module or ConBox), J949 (address word 0075) during vehicle
diagnostics.
Workshop findings:
• Criterion 1:
No diagnostics communication can be established with the control module for the emergency call module
and communication unit (telematics control module or ConBox), J949 (address word 0075) via ODIS.
• Criterion 2:
The following DTC may be entered in Databus Control Module -J533- (address word 0019) but the ConBox
(address word 0075) can be addressed via ODIS:
• DTC U142100: Control module for emergency call module and communication unit no communication
Note:
This TSB only applies to vehicles that have no diagnostics communication to the telematics control module,
J949 (address word 0075). If DTC U153E00 is entered in the telematics control module, J949 (address word
0075), please reference TSB 2055945: 91 SOS Emergency call function deactivated message in the cluster,
DTC U153E00 stored in the telematics module.

Technical Background
A software bug can cause the control module to freeze during a cold start.

Production Solution
Not Applicable

Page 2 of 7
© 2023 Audi of America, Inc.
All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and other intellectual property rights
of Audi of America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any time without notice. No part of this document may be reproduced, stored in a
retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, nor may these materials be modified or reposted to other sites, without
the prior expressed written permission of the publisher.

Technical Service Bulletin
Service
Criterion 1:
(Not required if the ConBox (address word 0075) is addressable via ODIS):
1. Remove and unplug the telematics control module, J949 (address word 0075) according to the Elsa Repair
Manual.
2. Open the battery compartment of the
telematics control module, J949 (address word
0075), and disconnect the backup battery
(Figures 2 - 3).

Figure 2. Backup battery compartment location.

Page 3 of 7
© 2023 Audi of America, Inc.
All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and other intellectual property rights
of Audi of America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any time without notice. No part of this document may be reproduced, stored in a
retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, nor may these materials be modified or reposted to other sites, without
the prior expressed written permission of the publisher.

Technical Service Bulletin

Figure 3. Backup battery connector (no release
mechanism).
3. Remove the fuse supplying power to the data bus onboard diagnostic interface, J533 (address word 0019).
Please consult Elsa or the vehicle owner’s manual as to the fuse location for the specific model on which you
are working.
Note:
The vehicle is not able to be moved under its own power while J533 is without power. Please make sure the
vehicle is parked in a suitable location for the duration of the procedure.
4. Leave the battery and Gateway fuse disconnected for approximately 20 minutes, then reinstall the fuse.
5. Reinstall the backup battery back into the telematics control module, J949 (address word 0075).
6. Reinstall the telematics control module, J949 (address word 0075) back into the vehicle.
7. If ODIS still cannot connect to the telematics control module, J949 (address word 0075), then follow the
ODIS test plan and replace the telematics control module with part number 992 035 286 C.
If ODIS can connect to the telematics control module, J949 (address word 0075) after this procedure,
continue with Criterion 2.
Criterion 2:
SVM Update Instructions

Always use DoIP when flashing a control module via ODIS in supported vehicles.

Page 4 of 7
© 2023 Audi of America, Inc.
All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and other intellectual property rights
of Audi of America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any time without notice. No part of this document may be reproduced, stored in a
retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, nor may these materials be modified or reposted to other sites, without
the prior expressed written permission of the publisher.

Technical Service Bulletin
To Activate DoIP, select Administration>>General>>GFF Process>>DoIP communication>>Only allow
DoIP communication
This setting will automatically reset when the diagnostic session is ended.
You can tell if DoIP is active by observing a red LED on the VAS 6154(A)
1. Follow all instructions in TSB 2011732: 00 Software Version Management (SVM), operating instructions.
2. Update the telematics control module, J949 (address word 0075) using the SVM action code as listed in the
table below, if necessary:
SVM Code Input
Old
Old
New
New
Software
Software Software
Software
Part Number Version
Part Number Version

Model

(or higher)
A4/A5/A6/A7/A8/Q5/Q7/Q8/e-tron
Quattro

4K1035283C

0233

4K1035283K

(or
higher)
0420

75A027

Warranty
Claim Type:

• 110 up to 48 Months/50,000 Miles.
• G10 for CPO Covered Vehicles – Verify Owner.
• If the vehicle is outside any warranty, this Technical Service Bulletin is informational
only.

Service Number:

9145

Damage Code:

0039

Criterion 1 only:
Labor Operations:

Telematics control module remove + reinstall

9170 1950
Or
9170 1900
Or

See SRT and
associated
predecessor
by model

9170 1952
Remove and reinstall the telematics control
module backup battery

9170 1999

5 TU

Page 5 of 7
© 2023 Audi of America, Inc.
All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and other intellectual property rights
of Audi of America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any time without notice. No part of this document may be reproduced, stored in a
retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, nor may these materials be modified or reposted to other sites, without
the prior expressed written permission of the publisher.

Technical Service Bulletin
Remove and reinstall the fuse for the Data Bus on 9035 1999
Board Diagnostic Interface
Diagnostic Time:

5 TU

GFF

0150 0000

Time stated
on the
diagnostic
protocol
(Max 20 TU)

Road test prior to the service procedure

No allowance

0 TU

Road test after the service procedure

No allowance

0 TU

Labor Operations:

Software Update

0151 0000

Time stated
on the
diagnostic
protocol
(Max 85 TU)

Diagnostic Time:

GFF

No allowance

0 TU

Road test prior to the service procedure

No allowance

0 TU

Road test after the service procedure

No allowance

0 TU

Criterion 2 only:

Claim Comment:

As per TSB 2056076/18

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.

Required Parts and Tools
The part numbers mentioned in this TSB are different from the ones listed in ETKA. Only use parts
listed in this TSB, this includes superseding part numbers!
Part Number

Part Description

Quantity

See ETKA

Fasteners, Bolts, Nuts, and Screws as needed per the
Repair Manual

See ETKA/ELSA

992035286C

Telematics Control Module (if required under Criterion
1)

01

Page 6 of 7
© 2023 Audi of America, Inc.
All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and other intellectual property rights
of Audi of America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any time without notice. No part of this document may be reproduced, stored in a
retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, nor may these materials be modified or reposted to other sites, without
the prior expressed written permission of the publisher.

Technical Service Bulletin
Additional Information
The following Technical Service Bulletin(s) may be necessary to complete this procedure:
• TSB 2055945, 91 SOS Emergency call function deactivated message in the cluster, DTC U153E00 stored in
the telematics module.
• TSB 2011732: 00 Software Version Management (SVM), operating instructions.
• Owner’s Manual: Fuses.
• Elsa: Wiring Diagrams >> Component Locations >> Fuses.
All part and service references provided in this TSB (2056076) 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.
©2023 Audi of America, Inc. All rights reserved. The information contained in this document is based on the
latest information available at the time of printing and is subject to the copyright and other intellectual property
rights of Audi of America, Inc., its affiliated companies, and its licensors. All rights are reserved to make changes
at any time without notice. No part of this document may be reproduced, stored in a retrieval system, or
transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, nor may
these materials be modified or reposted to other sites, without the prior expressed written permission of the
publisher.

Page 7 of 7
© 2023 Audi of America, Inc.
All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and other intellectual property rights
of Audi of America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any time without notice. No part of this document may be reproduced, stored in a
retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, nor may these materials be modified or reposted to other sites, without
the prior expressed written permission of the publisher.