A4524402072977_2
Service Bulletin Details
Public Details for: A4524402072977_2
This bulletin provides information when the abs/esc control unit cannot be reached, dtc U012100, abs control module not communication.
- 2024 - 2023 - 2022 - 2021 - 2020 -
Models from 2023
2023 AUDI E-TRON SPORTBACK |
Models from 2022
2022 AUDI E-TRON SPORTBACK |
Models from 2021
2021 AUDI E-TRON SPORTBACK |
Models from 2020
2020 AUDI E-TRON SPORTBACK |
Technical Service Bulletin 45 ABS/ESC control unit cannot be reached "DTC U012100 ABS Control Module no communication" stored 45 24 40 2072977/2 March 22, 2024. Supersedes Technical Service Bulletin Group 45 number 24-39 dated February 14, 2024 for reasons listed below. Model(s) Year e-tron quattro VIN Range Vehicle-Specific Equipment All Not Applicable 2019 2021 - 2023 e-tron Sportback quattro 2020 - 2023 e-tron S 2022 - 2023 Q8 e-tron, Q8 Sportback e-tron, SQ8 e-tron, and SQ8 Sportback e-tron 2024 Condition REVISION HISTORY Revision Date Purpose 2 - Revised Service (Updated procedure) Revised Warranty (Updated Labor Operations) 1 02/14/2024 Initial publication Customer states: • There is reduced braking assistance and various warning lamps appearing in the instrument cluster. Workshop findings: • ABS/ESC Control unit -J104- (Diagnostic address 0003) cannot be reached in communication. • The DTC "U012100 (Symptom Code 19875), ABS Control Module no communication" is also logged in the diagnostic address 0001. Technical Background Control unit -J104- has performed a restart. After this, the electromechanical brake servo remains on the hydraulic fallback level and no bus communication takes place. This results in driver messages from other vehicle systems being displayed. This restart only occurs in very rare exceptional cases. © 2024 Audi of America, Inc. Internal Page 1 of 3 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 Production Solution Not applicable. Service Proceed as follows: Vehicles equipped with ABS/ESC control unit -J104- with software version SW 2XX. • Disconnect the 12V battery from the vehicle for 5 minutes and then check the accessibility of the control unit J104- in the diagnosis. • Make sure the current software for the ABS control unit -J104- is at least version 242. (If the software level is below 242, review if the vehicle is affected by Field Campaign 93N1 and proceed with the necessary updates prior to moving to the next step). • Release the parking brake. • Perform a software update as described below. • Follow all instructions in TSB 2011732: 00 Software Version Management (SVM), operating instructions. • Update the ABS control unit (J104) using the SVM action code as listed in the table below, if necessary: Model Old Software Part Number 4KE909059N Old Software Version 242 New Software Part Number New Software Version (or higher) (or higher) 4KE909059N 245 SVM Code Input 243 244 e-tron/Q8 e-tron 4KE909059G 242 03A036 4KE909059G 245 243 • Afterwards perform a Basic Settings of the Parking Brake and TPMS. • If there are no DTCs stored in the ABS control unit -J104-, the vehicle can be released. If there are DTCs stored in the ABS control unit, please follow GFF instructions. Vehicles equipped with ABS/ESC control unit with software version SW321, please review: PSS 2073483: 45 PSS ABS/ESC control unit cannot be reached “DTC U012100 ABS Control Module no communication” stored and follow instructions. © 2024 Audi of America, Inc. Internal Page 2 of 3 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 Do not replace any component. Any control unit replacement for this concern may be denied. Warranty Claim Type: • 110 Up to 48 Months/50,000 Miles. • G10 for CPO Covered Vehicles – Verify Owner. • If the vehicle is outside of any warranty, this Technical Service Bulletin is informational only. Service Number: 4545 Damage Code: 0040 Labor Operations: Loosen and secure earth strap 9785 0999 10 TU Check vehicle (bus sleep mode) 0689 0199 10 TU Software Update (Includes checking for DTCs) 0151 0000 Time stated on the diagnostic protocol Diagnostic Time: (Max 50 TU) Claim Comment: Road test prior to the service procedure No allowance 0 TU Road test after the service procedure No allowance 0 TU As per TSB 2072977/2 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. Additional Information All part and service references provided in this TSB (2072977) 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.©2024 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. © 2024 Audi of America, Inc. Internal Page 3 of 3 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.