A4 Quattro Wagon V6-3.0L (AVK) (2002)
Electronic Brake Control Module: Technical Service Bulletins
TCS/ABS - ESP Lamp ON/DTC Stored In ECM
45 ESP light on (DTC "Please read engine control unit")
45 10 03
November 29, 2010.
Supersedes Technical Service Bulletin Group 45 number 09 01 dated April 6, 2009 for reasons listed below.
^ The ESP light is on.
^ DTCS for "Please read memory of engine control unit," or Load/RPM signal missing from engine control unit" or similar are stored in the memory of
the ESP control unit.
When ESP regulation is necessary, the system interferes with the engine management system to reduce torque. Before the ESP system activates the
brakes, TCS regulation takes place. Therefore the engine management
system must work flawlessly to ensure proper ESP system operation. But if the ESP control unit receives a DTC from the engine control unit, it switches
the ESP function off and the ESP lamp comes on. A DTC is also recorded in the ESP control module. The ESP system is not faulty; instead, the
deactivation is a predefined step in the ESP control unit.
This condition does not relate to a malfunction of the ESP.
^ The deactivation of the ESP system is caused by the storage of a DTC in the engine control module. To address this DTC, it is necessary to evaluate