DTC U3000-49: Connectivity Master Unit (CMU) Internal Malfunction [Connectivity Master Unit]: Outline

WARNING: This page is about a different car, the 2020 Mazda CX-30. However, it is still accessible from the selected car via links, so may be relevant.

DTC U3000:49 (CONNECTIVITY MASTER UNIT) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location	Connectivity master unit (CMU) internal malfunction
Detection condition	When the connectivity master unit (CMU) communicates with each system, it detects a communication error or an error signal and the connectivity master unit (CMU) does not activate for a continuous 30 s.
Fail-safe	The accuracy of the vehicle position positioning decreases, and the vehicle position on the navigation screen is not indicated in the correct direction. Malfunction cannot be determined. No audio output. Emergency call voice not recognized. Multiple audio mixed together. Images not output. Images do not change. External device cannot be connected. Connected device cannot be operated.
Possible cause	Connectivity master unit (CMU) malfunction
System wiring diagram	Not applicable
Connector diagram	Not applicable