Without blind spot monitoring (BSM) system

WARNING: This page is about a different car, the 2016 Mazda CX-5. However, it is still accessible from the selected car via links, so may be relevant.

Possible cause

Connector terminal disconnection, poor contact, damage, deformation, corrosion
Rear body control module (RBCM) power supply voltage or body ground malfunction
Open circuit in wiring harness between rear body control module (RBCM) and connector C-08
Open circuit in wiring harness between connector C-08 and connector C-34
Connector C-34 malfunction
Connector C-08 malfunction
Rear body control module (RBCM) malfunction

System wiring diagram

Fig 1: Rear Body Control Module System Diagram

Courtesy of MAZDA MOTORS CORP.

Inspection item

Rear body control module (RBCM) power supply voltage-related wiring harness and fuse
Rear body control module (RBCM) body ground related wiring harness
Rear body control module (RBCM) connector
Connector C-34
Connector C-08
Wiring harness between connector C-34 and connector C-08
Wiring harness between rear body control module (RBCM) terminal 3E and connector C-08
Wiring harness between rear body control module (RBCM) terminal 3G and connector C-08
Rear body control module (RBCM)