Home >> Land Rover >> 2016 >> Range Rover Autobiography >> Repair and Diagnosis >> General Information >> DTC Index >> Diagnostic Trouble Code Index DTC: Transfer Case Control Module (TCCM) -- Range Rover/L405 >> Diagnostic Trouble Code Index DTC: Transfer Case Control Module (TCCM) >> Description And Operation >> DTC U3006-85: Control Module Input Power "A" - Signal above allowable range >> Possible Causes