DTC B1975-31: Rear View Mirror Module Camera - No Signal: Action

NOTE: To validate the repair, activate the smart rear view mirror and drive the vehicle for at least 10 minutes on a standard road and check the smart rear view mirror function. Then check this DTC is no longer set within the body control module

Refer to the appropriate system wiring diagrams and check the smart rear view mirror camera connections at both the roof antenna and the rear view mirror module. Replace the wiring harness as necessary
If the fault persists, install a new antenna roof pod housing the smart rear view camera