Home >> Jaguar >> 2015 >> XK 2D Convertible >> Repair and Diagnosis >> General Information >> DTC Index >> Diagnostic Trouble Code Index DTC: Audio Control Module (ACM) -- XK/X150 >> Diagnostic Trouble Code Index DTC: Audio Control Module (ACM) >> Description And Operation >> Audio Control Module [ACM] >> DTC B1A01-1A: Speaker #1 - Circuit resistance below threshold >> Possible Causes