Home › Jaguar › 2017 › XJR Base › Repair and Diagnosis › Quick Lookups › DTC Index › Diagnostic Trouble Code (DTC) Index DTC: Rear Differential Control Module (RDCM) -- XJ/X351 › DIAGNOSTIC TROUBLE CODE (DTC) INDEX DTC: Rear Differential Control Module (RDCM) › Description And Operation › Rear Differential Control Module (RDCM) › U3000-4B Control Module - Over temperature › Possible Causes