DTC U1A14-49: CAN Initialization Failure - Internal electronic failure: Action

Clear the diagnostic trouble code and retest. If the problem persists, configure the module using the manufacturers approved diagnostic system. Clear the diagnostic trouble code and retest
If the problem persists, renew the rear differential control module. Refer to the warranty policy and procedures manual, or determine if any prior approval program is in operation, prior to the installation of a new module/component