Home › Land Rover › 2014 › LR4 Base, AWD › Repair and Diagnosis › General Information › DTC Index › Diagnostic Trouble Code Index DTC: Air Suspension Control Module -- LR4/L319 › Diagnostic Trouble Code Index DTC: Air Suspension Control Module › Description And Operation › DTC U300D-01: Ignition Input On/Start - General electrical failure › Possible Causes