A9320342059309_2

93 "Electrical system: Malfunction! Safely turn off vehicle" is in the cluster, DTC P0AC000 is stored in
battery module
93 20 34 2059309/2 September 18, 2020. Supersedes Technical Service Bulletin Group 93 number 20-24 dated
April 23, 2020 for reasons listed below.
Model(s)
Year
VIN Range
Vehicle-Specific Equipment
Q5
2020
All
TFSI e
Condition
REVISION HISTORY
Revision
Date
Purpose
2
-
Revised header (Updated model)
1
04/23/2020
Initial publication
Customer states:
 When the "ignition" is switched on, a red warning light appears and the
vehicle cannot be moved.
 In the instrument cluster, the red battery symbol (Figure 1) with the text
"electrical system: Malfunction! Safely turn off vehicle" is shown.
Figure 1. Red battery symbol.
 After turning the car off and then on again, the warning light usually
goes out and the vehicle works properly again.
Workshop findings:
The following DTC is stored in the battery regulation control module, J840 (address word 008C):
 DTC P0AC000 (encoder 1 for current measurement hybrid/high-voltage battery, implausible signal).
 According to Guided Fault Finding the BJB (Battery Junction Box – SX6) should be replaced but the
replacement is not effective.
Note:
This condition is also extremely unlikely to happen again.
Technical Background
Page 1 of 3
© 2020 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.
The internal communication between the BJB (Battery Junction Box – SX6) electronics and the current/voltage
sensor is under extremely unusual conditions and registers as inaccurate.
Production Solution
Not applicable.
Service
The TSB applies if in the battery regulation control module, J840 (address word 008C) one of the following DTC
combinations is logged:
DTC
Combination/Not
Other DTC
Instructions
P0AC000
As only entry in 008C
P0AC000
In combination with
P33F000
Perform TSB
P0AC000
In combination with
U059B00
Perform TSB
Perform TSB
The TSB does not apply if other DTCs in addition to the DTC combinations above are logged in the battery
regulation control module, J840 (address word 008C). If this is the case, the TSB does not apply standard
diagnosis continues outside of this TSB.
If this TSB applies according to the above conditions (see table), postpone the repair as no effective
repair is possible at the moment.
Parts replacement does not solve this issue. Claims for replaced parts will be subject to review.
Warranty
This TSB is informational only and not applicable to any Audi Warranty.
Additional Information
All part and service references provided in this TSB (2059309) 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.
Page 2 of 3
© 2020 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.
©2020 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
© 2020 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.