Home >> Mazda >> 2021 >> 3 Base >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> On-Board Diagnostic - HS/Ms - Can >> DETERMINING OPEN CIRCUIT LOCATION (CAN-BUS No. 1) (US) >> C >> VINs 7, L, M (ATX) (without connectors C-37, C-36) >> Possible cause