A272472205883114
Service Bulletin Details
Public Details for: A272472205883114
This bulletin provides information for when there is a vehicle electrical system warning stored in the ecm, dtc U046900.
- 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 |
| 2023 AUDI S8 |
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 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 Q7 |
| 2020 AUDI Q8 |
| 2020 AUDI S8 |
Models from 2019
| 2019 AUDI A6 |
| 2019 AUDI A7 |
| 2019 AUDI A8 |
Technical Service Bulletin 27 48V vehicle electrical system warning, DTC U046900 stored in the ECM 27 24 72 2058831/14 April 26, 2024. Supersedes Technical Service Bulletin Group 27 number 24-69 dated March 12, 2024 for reasons listed below. Model(s) Year A6, A7, A8, and Q8 2019 - 2023 A6 allroad, S8, and Q7 2020 - 2023 VIN Range Vehicle-Specific Equipment All 48V electrical system Condition REVISION HISTORY Revision Date Purpose 14 - Revised Service (Updated Requirements for Coverage) Revised Warranty (Updated Labor Operations) 13 03/12/2024 Revised Service (Updated Requirements for Coverage) 12 01/18/2024 Revised Service (Updated Notices for clarity) Revised Additional Information (Updated reference TSB documents) Customer states: • The message “Electrical system: malfunction! Please contact Service” is displayed on the instrument cluster (Figure 1). • A yellow or red battery warning symbol is displayed on the instrument cluster. Figure 1. Cluster Warning Message. Workshop findings: The following DTC is stored: © 2024 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 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. • 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 © 2024 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 • 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 ELSA and reevaluate the concern: • B200096 – Faulty control module (Figure 2). 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. If the test plan provides the message “The event memory could not be read.” Then the starter/generator is not faulty and replacing the parts will not fix the problem. Complete function tests necessary for warranty coverage: Function test from previous instructions: • 00CC – Check/erase event memory entry Additional function tests necessary for 48V BSG replacement (provided from ELSA repair manual): In the event the 48V BSG is replaced after meeting the criteria listed above, the additional test plans must all be attached in the GFF Log for warranty approval. These test plans are covered under the Labor Operation for replacement of the 48V BSG. • De-energize of 48V vehicle electrical system • Re-energize 48V vehicle electrical system • 00CC – Replace control module • 0001 – Coolant circuit bleeding procedure Failure to provide the necessary test plans listed above may result in scrutiny and potential rejection of the warranty claim. Warranty Claim Type: • 110 up to 48 Months/50,000 Miles. • G10 for CPO Covered Vehicles – Verify Owner. © 2024 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 • 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 12V battery Charge (if starter-alternator requires replacement) 2706 8950 See SRT with associated operations GFF 0150 0060 Time stated on the diagnostic protocol Diagnostic Time: (Max 100 TU) Claim Comment: GFF (only if starter-alternator is not replaced) 0150 0010 See SRT with associated operations Road test prior to the service procedure No allowance 0 TU Road test after the service procedure No allowance 0 TU As per TSB 2058831/14 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 2067906: 27 48V Reference: Charging 48V Battery with 12V Charger DTC P0A7D00 • TSB 2067937: 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. ©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 © 2024 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 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 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.