DTC U3000-42: Connectivity Master Unit (CMU) Internal Malfunction: Notes

WARNING: This page is about a different car, the 2016 Mazda CX-5. However, it is still accessible from the selected car via links, so may be relevant.

Description	Connectivity master unit (CMU) internal malfunction (poor data read-outs)
Detection condition	The connectivity master unit (CMU) cannot read data from the NVRAM in the connectivity master unit (CMU) with the ignition switched to ACC or ON (engine off or on).
Fail-safe	Not applicable
Possible cause	Connectivity master unit (CMU) malfunction
System wiring diagram	Not applicable