Audi A4 Quattro Wagon (8K5) L4-2.0L Turbo (CAEB) Technical Service Bulletin # 281321 Date: 130419
Keyless Systems - Key Won't Stay Or Engage In Ignition Lock
28 Key does not stay or engage in ignition lock
28 13 21
2017555/8
April 19, 2013
Supersedes Technical Service Bulletin Group 28 number 12-19 dated May 1, 2012 for reasons listed below.
Vehicle Information
Condition
The master key with remote control does not engage or stay in the ignition lock.
^ On vehicles without Advanced Key, the remote keys are inoperable.
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^ On vehicles with Advanced Key:
^ Keyless unlocking/locking using the door handle and keyless opening of the trunk lid using the trunk handle are inoperable.
^ The vehicle cannot be started with the Start/Stop button.
^ The remote keys are inoperable.
^ These conditions may be present:
^ The message ~ignition lock faulty may appear in the instrument cluster driver information display.
^ DTC 00166 (Access/Start Authorization Switch -E415- Incorrect Signal) may be stored in Comfort System Central Control Module J393
(address word 46).
Technical Information
It is possible that objects have been inserted into the ignition lock, which causes the slide of the ignition lock to become stuck in the rear part of the
lock (S-contact position). The stuck slide is not allowed to return to the starting point (0-position).
Production Solution
Not applicable.
Service
1. With the ignition lock installed in the vehicle, return the slide to its starting point.
2. Insert your index finger into the ignition lock, gently press the slide to the end stop (max. force 30N, about 5mm), then release, allowing the slide
to bounce back.
3. With your index finger, hold the lower locking latch (Figure 2) and pull the slide out approximately 7mm.
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4. Additionally, light compressed air may be used to blow out dirt or debris from the ignition lock.
5. Please explain to the customer that the problem is caused by inserting unsuitable objects into the ignition lock.
Warranty
This TSB is informational only and not applicable to any Audi warranty.
Additional Information
All parts and service references provided in this TSB are subject to change and/or removal. Always check with your Parts Department and service
manuals for the latest information.
