Diagnostic Procedure

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 U3000:42 (DRIVER MONITORING CAMERA UNIT) DIAGNOSTIC PROCEDURE

Step	Inspection	Results	Action
1	INSPECT DRIVER MONITORING CAMERA UNIT FOR MALFUNCTION Clear the DTC recorded in the memory. (See CLEARING DTC .) Perform the DTC inspection for the driver monitoring camera unit. (See DTC INSPECTION .) Is the same Pending DTC present?	Yes	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW (US) .) If the CAN communication is normal, replace the driver monitoring camera unit and perform the repair completion verification. (See DRIVER MONITORING CAMERA UNIT REMOVAL/INSTALLATION (US) .)
1		No	Go to the next step.
Repair completion verification	VERIFY IF OTHER DTC IS DISPLAYED Perform the DTC inspection. (See DTC INSPECTION .) Are any other DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting.
Repair completion verification		No	DTC troubleshooting completed.