A461357 2031135-

Technical Service Bulletin
46 Yellow warning light for electric parking brake on, ACC inoperative once
46 13 57 2031135/2 August 16, 2013. Supersedes Technical Service Bulletin Group 46 number 12-26 dated
October 23, 2012 for reasons listed below.
Model(s)
Year
A4 / S4
2013
A5 / S5
2013
A5 Cabriolet
2013
Q5
2013
A6
2012 - 2013
A7
2012 - 2013
A8
2011 - 2013
VIN Range
Vehicle-Specific Equipment
All
Not Applicable
Condition
REVISION HISTORY
Revision
Date
Purpose
2
-
Revised header data (Added model years and DTCs)
Revised Condition (Added DTCs)
Revised Production Solution (Added solution)
1
10/23/2012
Initial publication
• The customer reports one of the following conditions:
• The yellow warning for electromechanical parking park (EPB) appeared once in the instrument cluster. The
warning turned off after the ignition was cycled, and there have not been additional occurrences. EPB
function was not affected.
• The adaptive cruise control (ACC) was inoperative once, but it resumed proper operation after the ignition
was cycled, and there have not been additional occurrences.
• One of the following DTCs is logged in the EPB control module, J540 (address word 53)
• DTC C101329 (Control module right channel voltage supply Implausible signal) with internal code 25
• DTC C101229 (Control module left channel voltage supply Implausible signal) with internal code 24
© 2013 Audi of America, Inc.
Page 1 of 3
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
Tip: Internal codes 24 or 25 are listed in “Extended environmental conditions”, under “Param_InterFaultID”,
as shown in red below.
Extended environmental conditions
Code
Value
Unit
Param_VoltaTermi30
14.4
V
Param_InterFaultID
24 or 25
Param_VehicSpeed
38
Param_NetwoManagState
normal
Param_IndicLampInElectParkiBrakeButton
Off
Param_RedIndicLamp
Off
Param_RedWarniLamp
Off
Param_GreenIndicLamp
Off
Param_YelloWarniLamp
Off
Param_StatuTermi15
On
Param_RWU
not active
Param_DSD
not active
Param_HTR
not active
Param_ECD
not active
Param_ACCRequeApply
not active
Param_AutoAdjus
not active
Param_GenerInspeFunct
not active
Param_InterParkiBrakeState
Dynamic
Param_SwitcStatuElectParkBrake
Idle
Param_StatuParkiLeft
BRAKE_RELEASED
Param_StatuParkiRight
BRAKE_RELEASED
© 2013 Audi of America, Inc.
km/h
Page 2 of 3
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
Technical Background
There is an issue with the software in the EPB control module that occurs one time. Because the issue only occurs
once, replacing the control module could cause an additional occurrence.
In the A4, A5 and Q5, EPB control modules with the following part numbers are affected:
• 8K0.907.801.J
• 8K0.907.801.K
• 8K0.907.801 L
Production Solution
Modified EPB control module software from:
A6(C7), A7 (C7), & A8 (D4): Vehicles produced from week 22/13
A4(B8), A5 (B8) and Q5(B8): Vehicles produced from week 22/13
Service
1. Delete the DTC and do not replace the control module.
2. Explain to the customer that the software issue can only occur one time, so replacing the control module is not
necessary, as doing so may cause the condition to occur again.
Warranty
This TSB is informational only and not applicable to any Audi warranty.
Additional Information
All parts and service references provided in this TSB (2031135) are subject to change and/or removal. Always
check with your Parts Department and service manuals for the latest information.
© 2013 Audi of America, Inc.
Page 3 of 3
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.