DTC B1A12-4A: Speaker #12 - Incorrect component installed: Action

NOTE: Meridian® sound, Meridian® Surround and Meridian® Reference audio systems only

Check that the correct sub-woofer 2 speaker is fitted and rectify as required, clear DTC and retest
If fault persists, refer to the appropriate system wiring diagrams and check the wiring harness and connectors on the sub-woofer 2 speaker circuit. Repair circuit as required, clear DTC and retest