This Preliminary Information communication provides information to the technician that when double lock button press with the key fob, the horn will sound, but it will be at a reduced volume. In early Body Control Module calibrations resulted in the horn relay activating for only 10 milliseconds vs. 20 milliseconds. This, in turn, would not allow the horn to reach its full volume, and as a result, the horn chirp would sound noticeably quieter than an equivalent vehicle. As a running change during production, the Body Control Module calibrations were updated and the feature was eliminated. Technician can update the Body Control Module and the horn will sound at a normal volume level from that point on.
