DTC U1233 Lost Communication With RAB Control Module: Trouble symptom

Coordination control of RAB Control Module does not operate normally.

CAUTION: When the keyless access Control Module is replaced, registration of the immobilizer is required. For the relevant procedures, refer to the "REGISTRATION MANUAL FOR IMMOBILIZER" contact an authorized Subaru Dealership.

Fig 1: Lost Communication With RAB Control Module Diagnostics Flowchart

Courtesy of SUBARU OF AMERICA, INC.