Possible cause
WARNING: This page is about a different car, the 2017 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.
- Connector terminal disconnection, poor contact, damage, deformation, corrosion
- Blind spot monitoring (BSM) control module (LH) power supply voltage or body ground malfunction
- Open circuit in wiring harness between blind spot monitoring (BSM) control module (LH) and connector C-19
- Open circuit in wiring harness between connector C-19 and rear body control module (RBCM)
- Connector C-19 malfunction
- Blind spot monitoring (BSM) control module (LH) malfunction
- CAN circuit in rear body control module (RBCM) malfunction