DTC B1DA9-2B: Retractable Hardtop Switch Circuit Malfunction [Retractable Hardtop Control Module]: Notes

WARNING: This page is about a different car, the 2020 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.

DTC B1DA9:2B (RETRACTABLE HARDTOP CONTROL MODULE) DETECTION CONDITION AND POSSIBLE CAUSE

Description	Retractable hardtop switch circuit malfunction
Detection condition	The retractable hardtop control module detects that the retractable hardtop switch is in the ON or OFF condition for 30 s.
Fail-safe	Stops retractable hardtop operation
Possible cause	Short to ground in wiring harness between retractable hardtop control module terminal 1J and indicator unit terminal I Indicator unit malfunction Retractable hardtop control module malfunction
Courtesy of MAZDA MOTORS CORP.