A9421372063075_1

94 Various warnings displayed in cluster, DTCs U121C00, U011000, U003600, U002800, U002900, U140500,
P0A2F00, P0A1B00
94 21 37 2063075/1 April 30, 2021.
Model(s)
Year
VIN Range
Vehicle-Specific Equipment
Q5
2018 - 2020
All
PHEV
Q5
2021
000001 - 079893
PHEV
Condition
Customer states:
 Various warning lamps come on in the instrument cluster.
And/or
 The vehicle cannot be driven.
Workshop findings:
Various DTCs related to the power electronics, J841 (address word 0051) are stored in various control modules.
A few examples are:
 DTC U003600 (Vehicle Communication Bus A (-) shorted to Bus A (+)).
 DTC U002800 (Vehicle Communication Bus A).
 DTC U002900 (Vehicle Communication Bus A Performance).
 DTC U140500 (Terminal 15 Implausible signal).
 DTC P0A2F00 (Drive Motor "A" Over Temperature).
 DTC P0A1B00 (Drive motor “A” Control Module).
 DTC U121C00 (Drive Motor “A” No Communication).
 DTC U011000 (Lost Communication With Drive Motor Control Module).
Technical Background
The 12V wiring harness for the power electronics, J841 (address word 0051) can chafe against the underbody
trim.
Production Solution
Harness routing improved.
Page 1 of 6
© 2021 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.
Service
1. Check the wiring harness for the power electronics, J841 (address word 0051) for any chafed sections
(Figure 1).
Figure 1. Chafed 12volt harness section.
2. A. If there is no damage found, this TSB does not apply please continue with normal diagnosis outside of this
bulletin.
B. If damaged wires are found, please document the damage following TSB 2061976: 97 Wire harness
repairs and documentation.
3. Repair the wires with VAS 1978B. If it is necessary to replace the contacts in the connector as part of the
repair work, please use gold-plated repair wires 000 979 038 EA.
Tip:
Use the following special tools to remove the pins from the connector:
 Primary locking device: VAS 1978/35-31.
 Secondary locking device: VAS 1978/17.
After the wires are repaired, please perform the additional steps:
Page 2 of 6
© 2021 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.
4. Expose and release retaining clip (see red circle
in Figure 2).
Figure 2. Harness modification diagram.
5. Pull wiring harness 5 mm (see red arrow in Figure 2) away from power electronics.
6. Secure clip again with textile tape N 107 290 02. Clip must be replaced if it is damaged during removal (part
number 6Q0 971 848 P).
7. Wrap textile tape N 107 290 02 around entire wiring harness as far as connector.
Page 3 of 6
© 2021 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.
8. Secure cable tie N 106 232 01 around wiring
harness and connector so that wiring harness is
pulled upward (see red circle in Figure 3).
Figure 3. Secure the cable tie.
9. Ensure the wire does not make contact with any components including the undershield after the repair work
is performed.
Warranty
Claim Type:
 110 up to 48 Months/50,000 Miles.
 G10 for CPO Covered Vehicles – Verify Owner.
 If the vehicle is outside any warranty, this Technical Service Bulletin is informational
only.
Service Number:
9725
Damage Code:
0025
Page 4 of 6
© 2021 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.
Labor Operations:
Diagnostic Time:
Claim Comment:
Remove and install rear cover
5194 1903
See SRT with
associated
operations
Checking wiring harness
9709 0199
10 TU
Repair wiring harness (depending on number
of damaged wires)
9709 41XX
See SRT with
associated
operations
Modify wiring harness
9709 4999
20 TU
GFF
0150 0000
Time stated on
the diagnostic
protocol (Max 50
TU)
Road test prior to the service procedure
No allowance
0 TU
Road test after the service procedure
0121 0004
10 TU
As per TSB #2063075/1
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.
Required Parts and Tools
The part numbers mentioned in this TSB are different than the ones listed in ETKA. Only use parts listed in this
TSB, this includes superseding part numbers!
Part Number
Part Description
Quantity
See ETKA
Fasteners, Bolts, Nuts, and Screws as needed per the
Repair Manual
See ETKA/ELSA
N 10729002
Textile tape
.2
N 10623201
Cable tie
01
000979940
Crimp connector
As needed
6Q0971848P
Clip
01 (if needed)
000979038EA
Repair wire
As needed
Page 5 of 6
© 2021 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.
Tool Number
Tool Description
VAS 1978B
Wiring harness repair set
VAS 1978/35-31
Primary locking device (Included in
VAS1978/35-20 Wiring Repair Set)
VAS 1978/17
Secondary locking device
Additional Information
The following Technical Service Bulletin(s) will be necessary to complete this procedure:
 TSB 2061976, 97 Wire harness repairs and documentation.
All parts and service references provided in this TSB (2063075) are subject to change and/or removal.
©2021 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 6 of 6
© 2021 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.