DTC B1A07-4A: Speaker #7 - Incorrect component installed: Action

NOTE: A coaxial high range (tweeter) speaker is connected in parallel with the mid-range speaker on Meridian® sound and Meridian® Surround audio systems. On Meridian® Reference audio systems, a mid-range speaker only is connected

Check that the correct rear right door high range (tweeter) speaker/mid-range 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 rear right door high range (tweeter) speaker/mid-range speaker circuit. Repair circuit as required, clear DTC and retest