DTC B1075 Acura

Cause and Solution

Short in the WHT wire between the Combination Switch Control Unit and the Relay Control Module (H L BACK-UP line) or between the Combination Switch Control Unit and the MICU
Open GND circuit
Blown fuse in the main under-hood fuse box
Blown fuse in the under-dash fuse relay box
Open or Short to ground at the Relay Control Unit
Open or Short to ground at the Combination Control Unit.
Faulty Relay Control Unit