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Home >> Mazda >> 2021 >> 3 Base >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Collision/Avoidance >> On-Board Diagnostic - Parking Assist Unit (Optical) >> DTC U3000-49: Parking Assist Unit (Optical) Internal Malfunction [Parking Assist Unit (Optical)] >> Diagnostic Procedure

Diagnostic Procedure

DTC U3000:49 [PARKING ASSIST UNIT (OPTICAL)] DIAGNOSTIC PROCEDURE

Step Inspection Results Action
1 INSPECT PARKING ASSIST UNIT (OPTICAL) FOR MALFUNCTION
  • Clear the DTC recorded in the memory. (See CLEARING DTC .)
  • Perform the DTC inspection for the parking assist unit (optical). (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 parking assist unit (optical) and perform the repair completion verification.
(See PARKING ASSIST UNIT (OPTICAL) REMOVAL/INSTALLATION (US) .)
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.
No DTC troubleshooting completed.