Technical Service Bulletin

Transaction No:

2071957/1

Release date:

11/06/2023

91-23-05 - MIB3 Poor Audio Quality

Condition
Applicable Vehicles
Model(s)

Atlas, Atlas Cross
Sport

Year

Eng. Code

2021 – 2023

All

Trans. Code VIN Range
From
All

All

VIN Range PR Code
To
All

8AR +
9VX

Revision Table
Instance Number

Published Date

Version Number

Reason for Update

2071957/1

11/06/2023

91-23-05

Original publication

This technical bulletin must be read in its entirety before attempting the software update.
 If software updates or flash campaigns/actions are performed on a vehicle, a charger with at
least 70A charging current MUST be used in order to avoid problems during software
updates and flash campaigns/actions.
 This technical bulletin ONLY applies to the vehicle groups specified above with PR codes
8AR+9VX.

The customer may report one or more of the following symptoms:
 Infotainment system loses sound
 Infotainment volume control(s) malfunction
 Infotainment system produces abnormal noise(s)

Page 1 of 4
© 2023 Volkswagen Group 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 Volkswagen Group 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

91-23-05 - MIB3 Poor Audio Quality

Transaction No:

2071957/1

Release date:

11/06/2023

Technical Background
This procedure resolves the concern(s) specified above by updating the amplifier -J525- to the latest
software level 3333.

Production Solution
N.A.

Service
Software Update Procedure
 Connect the MTRMSP0702 battery maintainer/charger to the vehicle’s 12 volt battery.
 Switch the ignition to the ON position.
 Connect the ODIS tester to the vehicle’s Data Link Connector (DLC).
 Initiate Guided Fault Finding (GFF) and allow the tester to perform module interrogation.
 Check the Software version number of Address 0047.
 If the Software version number is greater than or equal to 3333, this work procedure does not apply.
 If the Software version number is less than 3333, proceed with this technical bulletin.

Figure 1.
 Click on the “Special Functions” tab and scroll down to select “Adapting software”.
 Select option 2, “Software update via measure code.
 Enter corrective action code 4C54.
 Click “Complete/Next”.
 Follow all necessary prompts as needed once the test plan begins.
 Exit GFF once the test is complete.

Page 2 of 4
© 2023 Volkswagen Group 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 Volkswagen Group 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

91-23-05 - MIB3 Poor Audio Quality

Transaction No:

2071957/1

Release date:

11/06/2023

Warranty
To determine if this procedure is covered under Warranty, always refer to the Warranty Policies
and Procedures Manual 1)
Model(s)

Year(s)

Eng. Code(s)

Trans. Code(s)

VIN Range
From

VIN Range To

Atlas, Cross
Sport

2021 - 2023

All

All

All

All

SAGA Coding
Claim Type:

Use applicable Claim Type 1)
Damage

Service Number:

Code

9144

HST

Damage Location
(Depends on
Service No.)

--

--

0039
Atlas, Atlas Cross Sport

Parts Manufacturer

WG8 2)

Labor Operation 3) : Charge Battery

27068950 = See Elsa for latest time units.

Labor Operation 3) : Update Programming SVM

See GFF Time expenditure.

Diagnostic Time 4)
GFF Time expenditure

01500060 = Actual GFF print out. 70 TU max.

Road Test

01210002 = 00 TU
01210004 = 00 TU

Technical Diagnosis

01320000 = 00 TU max.

YES
NO
NO

Claim Comment: Input “As per Technical Bulletin 2071957” in comment section of Warranty Claim.
1)

Vehicle may be outside any Warranty in which case this Technical Bulletin is informational only.

2)

Code per warranty vendor code policy.

3)

Labor Time Units (TUs) are subject to change with ELSA updates.

4)

Documentation required per Warranty Policies and Procedures Manual.

Page 3 of 4
© 2023 Volkswagen Group 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 Volkswagen Group 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

91-23-05 - MIB3 Poor Audio Quality

Transaction No:

2071957/1

Release date:

11/06/2023

Required Parts and Tools
No Special Parts required.

Tool Description

Tool No:

Midtronics Battery Tester/Charger

MTRMSP0702 battery maintainer/charger

VAS Diagnostic Tool

VAS 6150/X & VAS 6160/X and ODIS Service with:
current online updates

Additional Information
All part and service references provided in this Technical Bulletin are subject to change and/or removal.
Always check with your Parts Dept. and Repair Manuals for the latest information.

Page 4 of 4
© 2023 Volkswagen Group 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 Volkswagen Group 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.