UPDATE Technical Bulletin
October 15, 2014
23N7 UPDATE - TDI Battery Management Software (FED_EMS)
NOTE:
 Perform this UPDATE on all applicable vehicles within the Federal Emissions Warranty.
 It is MANDATORY to perform UPDATES on all applicable vehicles in dealer inventory PRIOR TO
RETAIL SALE.
 Inform customers that this UPDATE will be available free of charge as long as their vehicle is within
the Warranty parameters outlined in this UPDATE.
NOTE:
Required DMS Wording/Programming Text (SAGA claim comments): UPDATE Code 23N7 TDI
Battery Management Software (FED_EMS)

Model(s)

Year

Engine Code

Trans. Code

Passat

2015

2.0L TDI (CVCA)

All

Jetta

2015

2.0L TDI (CVCA)

All

Golf

2015

2.0L TDI (CRUA)

All

Beetle, Beetle Convertible

2015

2.0L TDI (CVCA)

All

REVISION HISTORY
Revision

Date

Purpose

1

October 1, 2014

Original publication

2

October 15, 2014

Added tip to Inspect operation of air conditioning system after the
flash.

Condition
This update has been proactively released to prevent the battery from becoming discharged due to a
unique set of circumstances during the CAN bus diagnostic phase, leading to excessive parasitic draw
and a discharged battery while the vehicle is parked.

Page 1 of 9
© 2014 Volkswagen Group 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
Volkswagen Group 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.

UPDATE Technical Bulletin

This UPDATE is in effect until removed.
Vehicle must meet all of the following criteria:


Procedure is valid only for vehicles that show the 23N7 code in Elsa, Campaign/Action Information
screen on the day of repair.



If the vehicle is sold it must be within the Federal Emissions Warranty.



Procedure must be performed within the allotted time frame stated in this UPDATE.



Procedure must be performed on applicable vehicles in dealer inventory prior to sale.

Technical Background
The battery can become discharged when the ECM “wakes-up” the CAN bus to do a diagnostic (~9
hours after vehicle shut-off). During that diagnostic time-window, if the door is opened or the ignition
is switched ON, the ECM goes into a mode that can continuously wake-up the CAN bus, leading to
excessive parasitic draw and a discharged battery while the vehicle is parked.

Production Solution
New software implemented into production CW37.

Service
NOTE:
 Elsa is the only valid inquiry/verification source. Check Elsa on the day this vehicle UPDATE will be
performed to verify vehicle eligibility for the UPDATE. Status must show “open”. Attach an Elsa
printout showing the “open” status to the repair order.
 If this UPDATE appears to have already been performed but the code still shows open in Elsa,
contact Warranty before proceeding further. Another dealer may have recently performed this
UPDATE but not yet entered a claim for it in the system.
 Elsa may also show additional open action(s); if so, inform your customer - this work can be done
while the vehicle is in for this UPDATE.
 Contact the Warranty Helpline (U.S.) or the Warranty Campaign Specialist (Canada) if you have any
questions.

Page 2 of 9
© 2014 Volkswagen Group 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
Volkswagen Group 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.

UPDATE Technical Bulletin

Step 1:
 Enter the VIN in Elsa and proceed to the
“Campaign/Action” screen

Tip: On the date of repair, print this
screen and keep a copy with the
repair order
 Ensure that the Status is “Open”



Note the Applicable Criteria ID
for use in determining the
correct work to be done and
corresponding parts associated

Step 2:
 According to the table below, check and
if necessary, update software:
ODIS – enter Start Diagnosis=> Special
Functions=> Adapt Software test plan.

Page 3 of 9
© 2014 Volkswagen Group 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
Volkswagen Group 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.

UPDATE Technical Bulletin

Update Programming Procedure
Tip:
To Update-Programming using SVM, review and follow instructions in Technical Bulletin
Instance 2014603 “Software Version Management”.
The SVM Process must be completed in its entirety so the database receives the update
confirmation response. A warranty claim may not be reimbursed if there is no confirmation
response to support the claim.

Note:
Prior to launching VAS Diagnostic Device application and starting control module update process,
confirm tester screen saver and power settings in accordance with Special Tools and Equipment Service Information Circular # VSE-08-18.
Failure to do so may result in the tester entering power save mode during data transfer, and
subsequent control module failure.
When using any tester in conjunction with a VAS 5054A wireless transmitter head for a flash
procedure, please connect a USB cable between the transmitter head and the tester. Failure to
do so may lead to errors during the flash procedure. Also, ensure that the tester is not
communicating via Bluetooth as the Bluetooth protocol is not a robust data transfer
environment for the flash process. Control module failures caused by flashing via
Bluetooth will not be covered.
All Volkswagen scan tool devices must only be used with their power adapters plugged in. Under
no circumstances should they be used on battery power alone during the programming
procedure.
Critical Warning: The Midtronics Battery Charger must be connected to the vehicle battery for
the duration of the programming, to ensure the battery state of charge remains above 12.5 volts
during the update process. If the battery drops below 12.5 volts, the programming could fail which
may result in damage to the control module.
Control modules damaged by insufficient voltage will not be covered.
The technician should verify the vehicle voltage prior to starting the update process, and should
monitor the voltage for the duration of the update.

WARNING:
Radiator Fan(s) may cycle ON high speed during the Update Process! There is a serious risk
that personal injury may result if contact is made with spinning fan blades. Keep hands and all
objects away from Radiator Fan(s) during Update Process!

Page 4 of 9
© 2014 Volkswagen Group 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
Volkswagen Group 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.

UPDATE Technical Bulletin
1. Connect battery charger and scan tool to vehicle and navigate to Guided Fault Finding=>
Diagnosis=>Special Functions=>Adapting Software=>Perform Test.
2. Update the Engine Control Module using the SVM Unit code as listed in the table below:
3. If necessary, refer to instructions in TB, 2014603: 00 Software Version Management (SVM),
operating instructions.

Model

Engine

Old Software
Part No.

Old
Software
Version

04L906016AF
Passat

Jetta

New
Software Part
No.

New
Software
Version
(or higher)

04L906016AF

8275

04L906016AE

04L906016AE

8272

04L906016AJ

04L906016AJ

8273

04L906016AK

8276

CVCA

SVM
Action
Code

All

CVCA

All
04L906016AK

3B57
04L906021D
Golf

Beetle,
Beetle
Convertible

04L906021D

8278

04L906021C

04L906021C

8277

04L906016AG

04L906016AG

8271

04L906016AH

8274

CRUA

All

CVCA

All
04L906016AH

Tip: Once the software update is complete, inspect the operation of the air conditioning (A/C)
system. It is possible that the A/C system will not produce cold air due to lost calibration
of the ambient temperature sensor. If A/C system is not operational, perform a brief test
drive for approximately 1 or 2 miles. This test drive will recalibrate the ambient
temperature sensor and allow the A/C system to operate correctly.

Tip: After the software update, when the ignition is switched on, it is possible that the TPMS
light may flash and/or remain illuminated and DTC 01325 tire pressure monitoring control
module no signal/communication may be present. If this condition occurs, clear the fault
codes in the ABS control module to correct the condition.

Page 5 of 9
© 2014 Volkswagen Group 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
Volkswagen Group 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.

UPDATE Technical Bulletin

Warranty
Claim Entry
Procedure

Enter your claim immediately upon completion of the UPDATE. Claims will only be paid
for vehicles that show this UPDATE code open in Elsa on the day of repair. To help
ensure prompt and proper payment, attach the screen print to the repair order.

Claim Help

U.S. dealers - Contact the Warranty Helpline toll-free at 1-866-306-8447 for help with
claim entry.
Canadian dealers - Contact your Warranty Campaign Specialist. For contact
information, please proceed to “ServiceNet – Warranty/Contact Information/Campaigns
– “Warranty Campaign Specialist.”

Required Customer Ensure customers are aware of all work performed on the vehicle by recording the
Notification
information on the repair order.
Attach a copy of the Vehicle UPDATE Fact Sheet to the customer’s copy of the repair
order and take the time to explain this UPDATE to your customer.

SAGA Code 23N7 Claim Entry Procedure
Check Elsa to confirm that this UPDATE code is open on the day of repair.
Service No.: 23N7
Damage Code: 0099
Parts Manufacturer/Vendor Code: WWO
Claim Type
Sold vehicle = 7 10
Unsold vehicle = 7 90
Accounting Instructions
Criteria I.D. 01
Check/UPDATE present. No further work required.
Repair operation:

0183 00 99

10 TU

-- OR -Check software, new software available. Install new ECM software.
Repair operation:

2360 25 99

40 TU

There is NO reimbursement for wash or loaner vehicle!

Page 6 of 9
© 2014 Volkswagen Group 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
Volkswagen Group 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.

UPDATE Technical Bulletin
If the vehicle is outside of the specified warranty period OR if customer refused repairs.
U.S. dealers: Submit the request through WISE under the Campaigns/Update/Recall Closure option.
Canadian dealers: Fax the Repair Order to Warranty at (905) 428-4811 and provide VIN, applicable
Service Number, Customer Information, Dealer Number and Date.

Page 7 of 9
© 2014 Volkswagen Group 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
Volkswagen Group 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.

UPDATE Technical Bulletin

Required Parts and Tools
Tool Description

Tool No:

Always ensure the ODIS Service application and brand
diagnostic data versions are up-to-date prior to performing SVM.

VAS Diagnostic Device

Additional Information
All part and service references provided in this Technical Bulletin are subject to change and/or
removal. Always check Elsa for the most current version of this document.

Page 8 of 9
© 2014 Volkswagen Group 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
Volkswagen Group 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.

UPDATE Technical Bulletin
UPDATE FACT SHEET – UPDATE Code 23N7
Dear Volkswagen Customer,
Today we performed UPDATE code 23N7 on your vehicle. This UPDATE ensures the latest
software is present in your vehicle, and was performed for you free of charge.
Volkswagen periodically makes updates like this available in order to ensure our customer’s
continued satisfaction with the quality of their Volkswagen vehicles.
We at Volkswagen are committed to providing our customers with reliable, quality products
that are a pleasure to drive and own. If you should ever have any questions or vehicle
concerns, your authorized Volkswagen dealer will be pleased to assist you.
Thank you for driving a Volkswagen!