Home › Jaguar › 2017 › XJR Base › Repair and Diagnosis › Quick Lookups › DTC Index › Diagnostic Trouble Code (DTC) Index DTC: Transfer Case Control Module (TCCM) -- XJ/X351 › Diagnostic Trouble Code (DTC) Index DTC: Transfer Case Control Module (TCCM) › Description And Operation › Transfer Case Control Module (TCCM) › U0001-81 High Speed CAN Communication Bus - Invalid serial data received › Possible Causes