Technical Service Bulletin
46 Yellow warning light for electric parking brake on, ACC inoperative once
46 14 84 2031135/3 July 9, 2014. Supersedes Technical Service Bulletin Group 46 number 13-57 dated August
16, 2013 for reasons listed below.

Model(s)

Year

VIN Range

Vehicle-Specific Equipment

A4

2012 - 2013

All

Not Applicable

A5

2012 - 2013

All

Not Applicable

A5 Cabriolet

2012 - 2013

All

Not Applicable

Q5

2012 - 2013

All

Not Applicable

A6

2011 - 2013

All

Not Applicable

A7

2011 - 2013

All

Not Applicable

A8

2010 - 2013

All

Not Applicable

Condition
REVISION HISTORY
Revision

Date

Purpose

3

-

Revised Warranty (Added warranty table)

2

08/16/2013

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 brake (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
© 2014 Audi of America, Inc.

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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

© 2014 Audi of America, Inc.

km/h

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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.

© 2014 Audi of America, Inc.

Page 3 of 4

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
Warranty
Claim Type:

Use applicable claim type. If vehicle is outside any warranty, this Technical Service Bulletin
is informational only.

Service Number:

4664

Damage Code:

0039

Diagnostic Time:

GFF – Checking and clearing fault codes included
in existing labor operations

0150 0000

Time stated on
diagnostic protocol
(Max 50 TU)

Road test prior to service procedure

No allowance

0 TU

Road test after service procedure

No allowance

0 TU

Technical diagnosis at dealer’s discretion
(Refer to Section 2.2.1.2 and Audi Warranty Online for DADP allowance details)
Claim Comment:

As per TSB # 2031135/3

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.

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.

© 2014 Audi of America, Inc.

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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.