DTC B1DA9-23: 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 B1DA9:23 (RETRACTABLE HARDTOP CONTROL MODULE) DETECTION CONDITION AND POSSIBLE CAUSE

Description	Retractable hardtop switch circuit malfunction
Detection condition	The retractable hardtop control module detects a short to ground in retractable hardtop switch circuit.
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.