DTC B128C-4A: Speaker #15 - Incorrect component installed: Action

NOTE: Meridian® Surround and Meridian® Reference audio system only

Check that the correct front centre surround tweeter/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 front centre surround tweeter/mid-range speaker circuit. Repair circuit as required, clear DTC and retest