A6 Sedan V6-3.2L (BKH) (2007)
Keyless Start Control Module: All Technical Service Bulletins
Keyless Starting - No Start/Battery Discharged
27 Battery discharged on vehicles with Advanced Key
96 10 02
2019143/5
February 8, 2010.
Supersedes Technical Service Bulletin Group 96 number 09-15 dated November 20, 2009 for reasons listed below.
Affected Vehicles
Condition
^ The customer may report that the engine doesn't start due to a discharged vehicle battery.
^ Possibly affected vehicles must have the following equipment:
^
Audi Advanced Key (PR No. 4F2, 4K7 or 4I3).
^
Control unit for access and start authorization J518 (address 05) SW version below 240 (4F0 905 852 B) or below 50 (4F0 905 852 C).
Technical Background
Pressing the start button while the ignition key is not in the vehicle wakes the CAN comfort bus system and may keep the system awake. This may lead to
a discharge of the vehicle battery to the point that an engine start is no longer possible.
Production Solution
New software in the control unit for access and start authorization (J518) resolved the problem.
Service
1. Connect the vehicle to an approved charger or voltage maintainer and verify the battery state of health with the "Battery Test Plan" in the 61 - energy
management control unit J644. Recharge or replace the battery according to the result.
Tip: When replacing the battery, all necessary documentation must be attached to the work order.