2038295/1

Technical Service Bulletin
26 Refill AdBlue warning comes on prematurely with no faults stored
26 14 24 2038295/1 September 16, 2014.
Model(s)
Year
VIN Range
Vehicle-Specific Equipment
Q7
2009 - 2012
All
TDI clean diesel
Condition
• There are “Refill AdBlue” warnings in the cluster. The warnings appear approximately 1,500 - 2,500 miles after
the last top-off.
• When the AdBlue tank is refilled, the vehicle will only accept approximately 1 - 2 gallons of reductant. When
checked manually, the active tank is 50% full or less and the passive tank is full.
• There are no reductant system fault codes stored. If any reductant system fault codes are stored, this TSB
does not apply.
Technical Background
The reducing agent transfer pump V436 may be faulty. The vehicle cannot pump AdBlue from the passive tank to
the active tank. Cars in hot weather regions are more prone to this issue.
Production Solution
A more robust transfer pump is in development.
Service
Perform the output test of the V436 transfer pump using the steps below.
For KWP2000 vehicles (MY2009-2010):
1. Locate the output test in ODIS under OBD >> 01 Engine Control Module 1>> Output Diagnostic Test Mode.
2. Click the dot next to selective, then enter actuator code 5278.
3. Click Start to begin the output sequence (Figure 1).
4. If the transfer pump fails to function (see attached video for typical clicking noise made during normal
operation) or fails to transfer fluid (which can be verified by disconnecting transfer pump line), see Repair
Manual >> Engine >> Engine Mechanical >> 26 Exhaust System, Emission Controls >> Reducing Agent
Metering System>> Reducing Agent Transfer Pump V436, Removing and Installing.
© 2014 Audi of America, Inc.
Page 1 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
Figure 1. Output test of SCR transfer pump in ODIS for KWP2000 vehicles.
For UDS vehicles (MY2011+):
1. Locate the output test in ODIS under OBD >> 01 Engine Control Module 1>> Output Diagnostic Test Mode>>
Actuator selection>> SCR activation transfer pump (Figure 2).
2. If the transfer pump fails to function (see attached video for typical clicking noise made during normal
operation) or fails to transfer fluid (which can be verified by disconnecting transfer pump line), see Repair
Manual >> Engine >> Engine Mechanical >> 26 Exhaust System, Emission Controls >> Reducing Agent
Metering System>> Reducing Agent Transfer Pump V436, Removing and Installing.
© 2014 Audi of America, Inc.
Page 2 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
Figure 2. Output test of SCR transfer pump in ODIS for UDS vehicles
Warranty
Claim Type:
Use applicable claim type. If vehicle is outside any warranty, this Technical Service
Bulletin is informational only.
Service Number:
2683
Damage Code:
0017
Labor Operations:
Reductive agent supply module remove + reinstall
2683 1901
50 TU
Diagnostic Time:
GFF – Checking and clearing fault codes
0150 0000
80 TU
Transfer pump output test
2683 1999
20 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:
© 2014 Audi of America, Inc.
As per TSB #2038295/1
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
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
Part Number
Part Description
Quantity
4L0131901
Transfer pump for reduction agent
1
Additional Information
All parts and service references provided in this TSB (2038295) 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.
Page 4 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.