Blind Spot Monitoring (BSM) Control Module Inspection: Notes

Remove the trunk box. (See TRUNK BOX REMOVAL/INSTALLATION .)
Remove the seat side box. (BSM control module (LH) only) (See SEAT SIDE BOX REMOVAL/INSTALLATION .)
Remove the trunk end trim. (BSM control module (LH) only) (Vehicles with Bose®) (See TRUNK END TRIM REMOVAL/INSTALLATION .)
Remove the bass-box. (BSM control module (LH) only) (Vehicles with Bose®) (See BASS-BOX REMOVAL/INSTALLATION .)
Remove the BSM control module with the connector connected.
Measure the BSM control module terminal voltage using the short wiring harness connector in the position shown in the figure.

Fig 1: Identifying Trunk End Trim & BSM Control Module Short Wiring Harness Connector
Courtesy of MAZDA MOTORS CORP.
NOTE:
- The BSM control module connector cannot be connected to a tester due to its water-resistance processing, therefore the short wiring harness connector is used for measuring the terminal voltage.
- If the terminal voltage is not as indicated in the table, inspect the short wiring harness connector for continuity. (See CONTINUITY INSPECTION OF SHORT WIRING HARNESS CONNECTOR .) If the short wiring harness connector is normal, inspect the parts under "Inspection items".
  - If the system does not work properly even though the parts or related wiring harnesses do not have any malfunction, replace the BSM control module.