Home >> Land Rover >> 2015 >> LR4 Base, AWD >> Repair and Diagnosis >> General Information >> DTC Index >> Diagnostic Trouble Code Index DTC: Rear Seat Entertainment Control Module (RSECM) -- LR4/L319 >> Diagnostic Trouble Code Index DTC: Rear Seat Entertainment Control Module (RSECM) >> Description And Operation >> DTC B1252-93: USB Port - No operation >> Possible Causes