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Home >> Mazda >> 2017 >> CX-5 Grand Select, FWD >> Repair and Diagnosis >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Symptom Troubleshooting - Blind Spot Monitoring System >> Blind Spot Monitoring (BSM) Warning Light Does Not Illuminate While Under Blind Spot Monitoring (BSM) Warning Light-Illumination Conditions [Blind Spot Monitoring (BSM) System] >> Notes

Blind Spot Monitoring (BSM) Warning Light Does Not Illuminate While Under Blind Spot Monitoring (BSM) Warning Light-Illumination Conditions [Blind Spot Monitoring (BSM) System]: Notes

BSM WARNING LIGHT DOES NOT ILLUMINATE WHILE UNDER BSM WARNING LIGHT-ILLUMINATION CONDITIONS (BSM SYSTEM) - POSSIBLE CAUSE

Description BLIND SPOT MONITORING (BSM) WARNING LIGHT DOES NOT ILLUMINATE WHILE UNDER BLIND SPOT MONITORING (BSM) WARNING LIGHT-ILLUMINATION CONDITIONS
  • The blind spot monitoring (BSM) warning light does not illuminate despite satisfying the conditions to illuminate the blind spot monitoring (BSM) warning light (vehicle speed above 32 km/h {20 mph} or more, turn signals off, and vehicle in warning zone).
Possible Causes
NOTE:
  • Rear bumper problem such defective installation of rear bumper, excessive soiling on the radar emitting/receiving area, sticker adhesion (including transparent types), repairs to rear bumper using putty
  • Non-genuine bumper, paint, or installation of after-market parts negatively affecting radar echo-back ability
  • The system may not operate normally under the following conditions:
    • The rear bumper near the blind spot monitoring (BSM) control module has become deformed.
    • Snow, ice or mud adheres to the blind spot monitoring (BSM) control module on the rear bumper
    • Under bad weather conditions such as rain, snow and fog.
    • Stationary objects on a road or a road side such as small, two-wheeled vehicles, bicycles, pedestrians, animals, and shopping carts.
      • Vehicle shapes which do not reflect radar waves well such as empty trailers with a low vehicle height and sports cars.
    • Turn off the system while pulling a trailer or while an accessory such as a bicycle carrier is installed to the rear of the vehicle. Otherwise, the radio waves emitted by the radar will be blocked causing the system to not operate normally.
  • The blind spot monitoring (BSM) control module mistakenly recognizes a vehicle as being outside of the warning zone when it actually inside of it.
    • Radar (blind spot monitoring (BSM) control module integrated) is not emitted inside of warning zone (unable to emit radar inside warning zone)
  • Damage, deformity or looseness to installation bracket or vehicle frame (including moderate impacts)
  • Malfunction in steering angle sensor (instrument cluster or EPS control module malfunction)
    • Problem with rear bumper such as soiling to radar emitting/receiving area, application of stickers (including transparent types), repairs using putty application.
    • Blind spot monitoring (BSM) control module does not receive echo-back correctly
  • Blind spot monitoring (BSM) control module (radar) malfunction
  • Problem with rear bumper such as soiling to radar emitting/receiving area, application of stickers (including transparent types), repairs using putty application.
    • After-market electrical parts interfere with blind spot monitoring (BSM) system
  • Malfunction in blind spot monitoring (BSM) warning light related parts
    • Open circuit in wiring harness between blind spot monitoring (BSM) warning light and blind spot monitoring (BSM) control module
    • Open circuit in wiring harness or poor ground between blind spot monitoring (BSM) control module and ground
      • Blind spot monitoring (BSM) warning light malfunction