A272364205883111
Service Bulletin Details
Public Details for: A272364205883111
This bulletin provides information for when there is a 48v vehicle electrical system warning; dtc U046900 is stored in the ecm.
- 2023 - 2022 - 2021 - 2020 - 2019 -
Models from 2023
| 2023 AUDI A6 |
| 2023 AUDI A6 ALLROAD |
| 2023 AUDI A7 |
| 2023 AUDI A8 |
| 2023 AUDI Q7 |
| 2023 AUDI Q8 |
Models from 2022
| 2022 AUDI A6 |
| 2022 AUDI A6 ALLROAD |
| 2022 AUDI A7 |
| 2022 AUDI A8 |
| 2022 AUDI Q7 |
| 2022 AUDI Q8 |
| 2022 AUDI S8 |
Models from 2021
| 2021 AUDI A6 |
| 2021 AUDI A6 ALLROAD |
| 2021 AUDI A7 |
| 2021 AUDI A8 |
| 2021 AUDI A8 PHEV |
| 2021 AUDI Q7 |
| 2021 AUDI Q8 |
| 2021 AUDI S8 |
Models from 2020
| 2020 AUDI A6 |
| 2020 AUDI A6 ALLROAD |
| 2020 AUDI A7 |
| 2020 AUDI A8 |
| 2020 AUDI A8 PHEV |
| 2020 AUDI Q7 |
| 2020 AUDI Q8 |
| 2020 AUDI S8 |
Models from 2019
| 2019 AUDI A6 |
| 2019 AUDI A7 |
| 2019 AUDI A8 |
| 2019 AUDI Q8 |
Technical Service Bulletin 27 48V vehicle electrical system warning, DTC U046900 stored in the ECM 27 23 64 2058831/11 December 22, 2023. Supersedes Technical Service Bulletin Group 27 number 23-63 dated December 13, 2023 for reasons listed below. Model(s) Year A6, A7, A8, and Q8 2019 – 2023 A6 allroad, and Q7 2020 – 2023 S8 2020 – 2022 A8 e quattro 2020 – 2021 VIN Range Vehicle-Specific Equipment All 48V electrical system Condition REVISION HISTORY Revision Date Purpose 11 - Revised Service (Updated verbiage to match ODIS tester) 10 12/13/2023 Revised title (Updated for clarity) Revised header (Updated DTCs) Revised Condition (Added image, updated Workshop findings, and added note) Revised Technical Background (updated statement) Revised Service (updated TSB instructions) Revised Warranty (updated Labor Operations) Revised Additional Information (included links to reference TSB documents) 9 06/14/2023 Revised header (updated vehicle and PR number filter) Customer states: • The message “Electrical system: Malfunction. See owner’s manual” is displayed on the instrument cluster (Figure 1). • A yellow or red battery warning symbol is displayed on the instrument cluster. © 2023 Audi of America, Inc. Internal Page 1 of 5 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 1. Cluster Warning Message. Workshop findings: The following DTC is stored: ECM, J623 (address word 0001), or Gateway, J533 (address word 0019): • DTC U046900: Invalid data received from starter/generator control module (symptom 36564). The DTC and symptom must match for this TSB to apply. Technical Background The Belt Starter Generator (BSG), together with the vehicle’s 48V system is an intelligent vehicle system that provides electrical power to the vehicle as needed. Therefore, traditional diagnosis methods, like expecting the alternator to output at full voltage any time the vehicle is running, are no longer viable, as the output power of the BSG is regulated according to the current requirements of the vehicle. For further information, please refer to TSB 2067906: 27 48V Reference: diagnosis and system information. A hardware related issue may cause the belt starter generator (BSG) to stop working as intended. Production Solution Not applicable. Service Prior to following the diagnostic instruction: • VAS tester with the current version of ODIS is installed. © 2023 Audi of America, Inc. Internal Page 2 of 5 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 • While diagnosing the 48V system ensure the 48V and 12V battery are charged properly prior to following the procedure, please refer to TSB 2067906: 27 48V Reference: Charging 48V Battery with 12V Charger DTC P0A7D00. Performing the function test “C29 – Check_Erase” and attach to the test plan: ODIS path for Q7: • Body • Electrical system • 01 - On Board Diagnostic capable systems • CC - starter-alternator -C29 • CC - Functions • 00CC – Check/erase event memory entry ODIS path for A6/A7/A8/Q8: • Diagnostic capable system • 00CC - starter alternator -C29 • 00CC - Functions • 00CC – Check/erase event memory entry When asked “Are you running this program based on an instruction in a Technical Service Bulletin (TSB)?”, answer the test plan with YES. If the following event memory entry is shown in ODIS, replace the starter-alternator according to ETKA and reevaluate the concern: • B200096 – Faulty control module (Figure 2). © 2023 Audi of America, Inc. Internal Page 3 of 5 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 2. ODIS tester screen. If the listed DTC is not stored in the test plan, then the generator is not faulty and replacing parts will not fix the problem. A screenshot of ODIS with the VIN and DTC Memory Results from the test plan is necessary for billing under warranty. Warranty © 2023 Audi of America, Inc. Internal Page 4 of 5 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 Claim Type: • 110 up to 48 Months/50,000 Miles. • G10 for CPO Covered Vehicles – Verify Owner. • 1-GW for vehicles that fall under the Starter-Alternator Limited Warranty Extension. Service Number: 2726 Damage Code: 0040 Labor Operations: Replace starter-alternator (If required according to this TSB.) 2726 XXXX See SRT with associated operations Diagnostic Time: GFF 0150 0060 Time stated on the diagnostic protocol (Max 100 TU) Road test prior to the service procedure No allowance 0 TU Road test after the service procedure No allowance 0 TU (Includes time to ensure 12V and 48V batteries are charged.) Claim Comment: As per TSB 2058831/11 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 The following Technical Service Bulletin(s) will be necessary to complete this procedure: • TSB 2011732: 00 Software Version Management (SVM), operating instructions. • TSB 2067906: 27 48V Reference: diagnosis and system information All part and service references provided in this TSB (2058831) 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. © 2023 Audi of America, Inc. Internal Page 5 of 5 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.