BLIND SPOT MONITORING (BSM) WARNING LIGHT DOES NOT FLASH WHILE UNDER BLIND SPOT MONITORING (BSM) WARNING LIGHT-FLASHING CONDITIONS (WITH LIGHT SWITCH OPERATION (TURN SIGNAL SWITCH)) [BLIND SPOT MONITORING (BSM) SYSTEM]

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BLIND SPOT MONITORING (BSM) WARNING LIGHT DOES NOT FLASH WHILE UNDER BLIND SPOT MONITORING (BSM) WARNING LIGHT-FLASHING CONDITIONS (WITH LIGHT SWITCH OPERATION (TURN SIGNAL SWITCH))
Description
•  The blind spot monitoring (BSM) warning light does not flash or illuminate continuously, but the conditions to flash the blind spot monitoring (BSM) warning light are satisfied (vehicle speed above 10 km/h {6.2 mph} (Australian specs.)/30 km/h {19 mph} (except Australian specs.) or more, turn signal on, and vehicle in warning zone).
•  Both blind spot monitoring (BSM) warning light does not flash under conditions even through under the RCTA activation conditions (selector lever is in R position and target vehicle detection).
•  Blind spot monitoring (BSM) warning light does not flash or illuminate continuously, but turn signals are off.
Possible Causes
Note
•  The detection performance of the blind spot monitoring (BSM) control module has limitations and the blind spot monitoring (BSM) system may not operate normally. For the detection performance limitations, refer to the [BLIND SPOT MONITORING (BSM) CONTROL MODULE] in the technical guide.
•  The blind spot monitoring (BSM) control module mistakenly recognizes a vehicle as being outside of the warning zone when it is 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 signal (communication error between instrument cluster, rear body control module (RBCM) and blind spot monitoring (BSM) control module, 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.
Note
•  Rear bumper problems such defective installation of rear bumper, excessive soiling on radar emitting/receiving area, sticker adhesion (including transparent types), repairs to rear bumper using putty.
•  Non-genuine bumper or paint, or installation of after-market parts negatively affecting radar echo-back ability.
?   After-market electrical parts interfere with blind spot monitoring (BSM) system
•  Blind spot monitoring (BSM) does not recognize vehicle speed correctly (blind spot monitoring (BSM) control module mistakenly recognizes vehicle speed as being within 10 km/h {6.2 mph} (Australian specs.)/30 km/h {19 mph} (except Australian specs.) or more)
?  PCM communication error with blind spot monitoring (BSM) control module
?  Malfunction in ABS wheel speed sensor related parts
•  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
•  Signal is not input for turn signal
?  Combination switch (turn signal switch) malfunction
?  Open circuit in wiring harness between combination switch (turn signal switch) and start stop unit
?  Communication error between instrument cluster, rear body control module (RBCM) and blind spot monitoring (BSM) control module or start stop unit malfunction
?  Blind spot monitoring (BSM) control module malfunction

Diagnostic Procedure

Step

Inspection

Result

Action
1
VERIFY MALFUNCTION SYMPTOM
•  Blind spot monitoring (BSM) warning light illuminates while under light-off conditions.
Yes
Go to the next step.
No
Go to the symptom troubleshooting procedure, “Blind spot monitoring (BSM) warning light does not illuminate while under blind spot monitoring (BSM) warning light-illumination conditions”.
(See BLIND SPOT MONITORING (BSM) WARNING LIGHT DOES NOT ILLUMINATE WHILE UNDER BLIND SPOT MONITORING (BSM) WARNING LIGHT-ILLUMINATION CONDITIONS [BLIND SPOT MONITORING (BSM) SYSTEM].)
2
INSPECT IF MALFUNCTION IS IN START STOP UNIT INPUT SIGNAL OR BLIND SPOT MONITORING (BSM)
•  Monitor the following PIDs on the start stop unit using the M-MDS.
?  TURN_SW_L
?  TURN_SW_R
•  Are the monitoring values normal?
Yes
Replace the blind spot monitoring (BSM) control module (LH).
(See BLIND SPOT MONITORING (BSM) CONTROL MODULE REMOVAL/INSTALLATION.)
No
Retrieve DTCs from the start stop unit, instrument cluster, and rear body control module (RBCM) using the M-MDS.
(See DTC INSPECTION [START STOP UNIT].)
(See DTC INSPECTION [INSTRUMENT CLUSTER].)
(See DTC INSPECTION [REAR BODY CONTROL MODULE (RBCM)].)