A901342 2035902-

Technical Service Bulletin
90 "Ignition lock faulty" message in cluster information display
90 13 42 2035902/1 November 27, 2013.
Model(s)
Year
A4
2009-2015
A5
2008-2015
CAB
2010-2015
Q5
2009-2015
VIN Range
Vehicle-Specific Equipment
All
Not Applicable
Condition
• “Ignition lock faulty” message is displayed in the driver information
display with the symbol shown at right (Figure 1).
Figure 1. Symbol shown in driver
information display.
• One of the following DTCs is stored in the comfort system central control unit, J393 (address word 46):
• DTC 0003: Control unit - 14 - Faulty
• DTC 3279: Clutch pedal switch for engine start (F194) - 8 - Implausible signal
• DTC 0185: Activation for power supply relay (terminal 15) - 7 - Short circuit to ground
• DTC 3282: Terminal 50 - 6 - Short circuit to B+
• DTC 3305: Wire for engine start request - 6 - Short circuit to B+
• DTC 0526: Brake light switch - 8 - Implausible signal
• DTC 0166: Access/start authorization switch (E415) - 8 - Implausible signal
• DTC 0194: Ignition key removal lock - 12 - Electrical malfunction in circuit
• DTC 0194: Ignition key removal catch - 7 - Short circuit to ground
• DTC 0194: Ignition key removal catch - 11 - Open circuit
Technical Background
The “ignition lock faulty” message can be triggered by many different DTC entries. Presence of the message does
not indicate that the ignition switch is faulty; the message typically has a different root cause. Replacing the ignition
switch before completing GFF test plans typically does not correct the condition.
© 2013 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
Production Solution
Not applicable.
Service
Complete all GFF test plans (automatically generated by ODIS) to ensure that the root cause is correctly
determined and resolved.
Tip: Replace the ignition switch only if instructed to do so by GFF. If the switch has already been replaced
and the condition is still present, contact TAC for further assistance.
Warranty
This TSB is informational only and not applicable to any Audi warranty.
Additional Information
All parts and service references provided in this TSB (2035626) 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 2 of 2
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.