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Home >> Mazda >> 2018 >> CX-9 Signature >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> On-Board Diagnostic - Connectivity Master Unit >> DTC U3000-42: Connectivity Master Unit (Control Module Unit) Internal Malfunction (Poor Data Read-Outs) >> Notes
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DTC U3000-42: Connectivity Master Unit (Control Module Unit) Internal Malfunction (Poor Data Read-Outs): Notes

Description Connectivity Master Unit (Control Module Unit) Internal Malfunction (Poor Data Read-Outs)
Detection Condition
  • The connectivity master unit (Control Module Unit) cannot read data from the NVRAM in the connectivity master unit (Control Module Unit) with the ignition switched to ACC or ON (engine off or on).
Fail-safe Not applicable
Possible Cause
  • Connectivity master unit (Control Module Unit) malfunction
System Wiring Diagram Not applicable