Home › Land Rover › 2013 › Range Rover Base › 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