Home >> Land Rover >> 2020 >> Range Rover Velar R-Dynamic HSE >> Repair and Diagnosis >> Quick Lookups >> DTC Index >> Diagnostic Trouble Code Index DTC: TELEMATIC Control Module (TCU) -- Range Rover Velar/L560 >> General Information >> Description And Operation >> Diagnostic Trouble Code Index - DTC: TELEMATIC Control Module (TCU) (G2723514) >> B117A-01: Backup Microphone - General Electrical Failure >> Possible Causes