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Home >> Mazda >> 2023 >> 3 Select, 4D Hatchback >> Repair and Diagnosis (Single Page) >> Brakes >> Traction Control >> On-Board Diagnostic - Dynamic Stability Control (2 Of 2) >> DTC U0300-51: Internal Control Module Software Incompatibility [DSC HU/Control Module] >> Diagnostic Procedure
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Diagnostic Procedure

DTC U0300:51 (DSC HU/Control Module) DIAGNOSTIC PROCEDURE

Step Inspection Results Action
1 INSPECT DSC HU/Control Module FOR MALFUNCTION DEPENDING ON REPEATABILITY 
  • Clear the DTC recorded in the memory. (See CLEARING DTC .)
  • Perform the DTC inspection for the DSC HU/Control Module. (See DTC INSPECTION .)
  • Is the same Pending DTC present?
 Yes Replace the DSC HU/Control Module and perform the repair completion verification.
(See DSC HU/Control Module REMOVAL/INSTALLATION [L.H.D. (US)] .)
No Go to the next step.
Repair completion verification VERIFY IF OTHER DTCs DISPLAYED 
  • Perform the DTC inspection. (See DTC INSPECTION .)
  • Are any DTCs displayed?
 Yes Repair the malfunctioning location according to the applicable DTC troubleshooting.
No DTC troubleshooting completed.
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