July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

DTC U3000-42: Control Module general memory failure: Contents

DTC No.	Detection Item	DTC Detection Condition	Warning Indicate	Memory	Fail-safe Operation	Note
U300042	Control Module general memory failure	Navigation receiver internal malfunction (poor data read-outs)	Not applicable	DTC Stored	Not applicable	Diagnostic assist code: 03/04 Drive cycle: Not applicable Self test type: CMDTC self test

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

HINT:

The double-digit number indicates the diagnostic assist code with which DTCs can be detected during the DTC inspection using the diagnostic assist function.

Refer to DIAGNOSTIC ASSIST FUNCTION