Home › Jaguar › 2015 › XJR Base › Repair and Diagnosis › Quick Lookups › DTC Index › Diagnostic Trouble Code (DTC) Index DTC: Adaptive Speed Control Module (ASCM) -- XJ/X351 › DIAGNOSTIC TROUBLE CODE (DTC) INDEX DTC: Adaptive Speed Control Module (ASCM) › Description And Operation › Adaptive Speed Control Module (ASCM) › U3000-42 Control Module - General memory failure › Possible Causes