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 I'm sorry but you are factually WRONG.  As an Automotive Engineer, with a keen interest in vehicle dynamics, I can assure you that traction control and EDL are operate in two very different methods.  All traction control systems monitor differential axle wheel speeds comparing the driven axle to the non-driven axle - any differences outside the scope of the allowed tollerances will ONLY result in either (a) BOTH driven wheels on the same axle being braked, or (b) the engine ECU reducing engine output, or (c) a combination of (a) and (b).  EDL does NOT compare differences between front and rear axles, it ONLY compares differences between the left and right wheels on the same axle, and brakes just ONE wheel, there is NO engine power intervention.  Whilst they are both ""add-on"" functions of modern ESP systems, and use the same related hardware and electronics, the software control of the two different systems are distinctly separate, and help moderate/control different aspects of vehicle dynamics.  Don't forget, Wikipedia articles are not considered valid references for other Wikipedia articles, so if you have read something contrary on another Wiki article, it doesn't automatically mean it is correct!   (talk to Teutonic_Tamer) "