Home >> Jaguar >> 2012 >> XJ Base >> Repair and Diagnosis (Single Page) >> General Information >> DTC Index >> Diagnostic Trouble Code (DTC) Index DTC: TELEMATIC Control Module (TCU) -- XJ/X351 >> Diagnostic Trouble Code (DTC) Index DTC: Telematic Control Module (TCU) >> Description And Operation >> TELEMATIC Control Module (TCU) >> B1A01-01 Speaker #1 - General Electrical Failure >> Possible Causes