A4822342065978_2

Technical Service Bulletin
48 Steering wheel heating does not heat up sufficiently
48 22 34 2065978/2 July 19, 2022. Supersedes Technical Service Bulletin Group 48 number 22-17 dated
February 1, 2022, for reasons listed below.
Model(s)
Year
VIN Range
Vehicle-Specific Equipment
All
Not Applicable
All Audi Vehicles 2008 – 2024
Condition
REVISION HISTORY
Revision
Date
Purpose
2
-
Revised Technical Background (Added Note)
1
02/01/2022
Initial publication
Customer states:
• The steering wheel does not heat up.
• The steering wheel does not heat up sufficiently.
• The steering wheel heats up unevenly.
• It takes a long time for the steering wheel to heat up.
Workshop findings:
•
There are no DTCs related to the topic.
Technical Background
Page 1 of 3
© 2022 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
The surface temperature may vary at different locations on the steering wheel due to uneven heat
distribution, which may give the impression that the steering wheel heating is insufficient or is not working at
all.
It may take over 30 minutes for the target temperature of approx. 30°C ± 3°C (86° F ± 5F°) to be
reached. The amount of time required is strongly dependent on the interior temperature and the settings on
the vehicle’s heater/air conditioner.
The surface temperature of the leather may be lower in the vicinity of the spokes compared to the rest of the
steering wheel, as some of the heat dissipates into the spokes.
The surface of the top part of the steering wheel (12 o’clock position) may also be heated up by sunlight,
resulting in a clearly noticeable temperature difference. If the driver holds the steering wheel at the 9 and 3 o
’clock positions, the leather will be warmed up by their hands. If the driver then touches the steering wheel at
the 12 and 6 o’clock positions, it will be cooler at these locations since they have not been warmed up by the
driver’s hands.
The NTC temperature sensor fitted in the foam underneath the cover can also cause the complaint to be
perceived differently.
When the desired surface temperature of 30°C (86° F) has been reached, the measured value for the
sensor is 34°C (93° F), as this is the temperature underneath the cover.
Note:
• Parts replacement does not solve this issue. Claims for replaced parts will be subject to review.
• If a critical case is identified, open a TAC case for further instructions.
Production Solution
Not applicable.
Service
Page 2 of 3
© 2022 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
Not applicable.
Warranty
This TSB is informational only and not applicable to any Audi Warranty.
Additional Information
All part and service references provided in this TSB (2065978) 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.
©2022 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 3 of 3
© 2022 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.