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Mazda
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2023
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3 S, 4D Hatchback
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Repair and Diagnosis
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Accessories & Equipment
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Drivers Assistance Systems - ADAS
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On-Board Diagnostic - Vehicle Control Module (2 Of 3)
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DTC U0121-00: Communication Error With DSC HU/Control Module [Vehicle Control Module (Us)]
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Diagnostic Procedure
Diagnostic Procedure
Perform an inspection in accordance with the multiplex communication system diagnostic procedure. (See
CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(US)]
.)