Bosch 5.3 ABS/EDL system, function: ASR:

ASR (traction control system) is only installed on vehicles with front wheel drive. On these vehicles it is important to check the control module coding. See CODE CONTROL MODULE (FUNCTION 07)  . The traction control function relies on an exchange of signals between ABS control module (w/EDL) -J104-, the engine control module and the transmission control module, in other words a communication link between the control modules.