Home >> Land Rover >> 2017 >> Range Rover Autobiography >> Repair and Diagnosis >> Quick Lookups >> 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 B1520-11: Auxiliary Fan Relay Control Line - Circuit short to ground >> Possible Causes