Home >> Land Rover >> 2015 >> Range Rover Autobiography >> Repair and Diagnosis >> General Information >> DTC Index >> Diagnostic Trouble Code Index DTC: Infotainment Master/Slave Controller (ISC/IMC) -- Range Rover/L405 >> Diagnostic Trouble Code Index DTC: Infotainment Master / Slave Controller (ISC / IMC) >> Description And Operation >> DTC B1492-12: Microphone #1 Input Signal - Circuit short to battery >> Possible Causes