DTC B2311 Rear Radar Detect TCM: Trouble symptom

All functions of BSD/RCTA stop.
Fail icon is displayed in the combination meter LCD display.
Failure-related notification is displayed for approx. two seconds on LCD display in the combination meter.
AT OIL TEMP light blinks in the combination meter.
NOTE: Check and replace the side that displayed the DTC.

Fig 1: Rear Radar Detect TCM Diagnostics Flowchart
Courtesy of SUBARU OF AMERICA, INC.