Possible cause

• Connector terminal disconnection, poor contact, damage, deformation, corrosion
• Open circuit in wiring harness between connector C-64 and connector C-14
• Open circuit in wiring harness between connector C-14 and connector C-71
• Open circuit in wiring harness between connector C-71 and rear body control module (RBCM)
• Connector C-64 malfunction
• Connector C-14 malfunction
• Connector C-71 malfunction
• Rear body control module (RBCM) malfunction

System wiring diagram

Fig 1: Rear Body Control Module Communication Diagram

Courtesy of MAZDA MOTORS CORP.

• 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-39
• Open circuit in wiring harness between connector C-39 and rear body control module (RBCM)
• Connector C-39 malfunction
• Blind spot monitoring (BSM) control module (LH) malfunction
• CAN circuit in rear body control module (RBCM) malfunction

System wiring diagram

Fig 1: Rear Body Control Module Communication Diagram

Courtesy of MAZDA MOTORS CORP.

• Connector terminal disconnection, poor contact, damage, deformation, corrosion
• Rear body control module (RBCM) power supply voltage or body ground malfunction
• Rear body control module (RBCM) malfunction

System wiring diagram

Fig 1: Rear Body Control Module (RBCM) Control Module Communication Diagram

Courtesy of MAZDA MOTORS CORP.