Home › Land Rover › 2017 › Discovery Sport SE › Repair and Diagnosis › Restraints › Restraints Control Systems › Diagnostic Trouble Code Index DTC: Restraints Control Module (RCM) -- Discovery Sport/L550 › Diagnostic Trouble Code Index DTC: Restraints Control Module (RCM) › Description And Operation › DTC U3000-53: Control Module - Deactivated › Possible Causes