DTC B13CD-9A: Roof Blind - Component or system operating conditions: Action

NOTE: This DTC may be induced by operating the front roof blind repeatedly.

Check the operation of the front roof blind switch. Free the stuck switch or install a new front roof blind switch as necessary
Refer to the appropriate system wiring diagrams and check the front roof blind switch circuit for short circuit to ground. Repair the wiring harness or install a new front roof blind switch as necessary