BLIND SPOT MONITORING (BSM) WARNING LIGHT DOES NOT ILLUMINATE WHILE UNDER BLIND SPOT MONITORING (BSM) WARNING LIGHT-ILLUMINATION CONDITIONS [BLIND SPOT MONITORING (BSM) SYSTEM]

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Item
BLIND SPOT MONITORING (BSM) WARNING LIGHT DOES NOT ILLUMINATE WHILE UNDER BLIND SPOT MONITORING (BSM) WARNING LIGHT-ILLUMINATION CONDITIONS
Description
•  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 10 km/h {6.2 mph} (Australian specs.)/30 km/h {19 mph} (except Australian specs.) or more, turn signals off, and vehicle in warning zone).
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 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, rear body control module (RBCM) 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 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
?  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

Diagnostic Procedure

Step

Inspection

Result

Action
1
INSPECT IF MALFUNCTION IS IN INPUT SIGNAL OR BLIND SPOT MONITORING (BSM) CONTROL MODULE
•  Monitor the following PIDs on the suspected side of the blind spot monitoring (BSM) control module using the M-MDS.
?  SWA_POS
•  Are the monitoring values normal?
Yes
Go to Step 3.
No
Go to the next step.
2
INSPECT STEERING ANGLE SIGNAL
•  Monitor the PID STR_ANG for the EPS control module using the M-MDS.
•  Is the monitoring value normal?
Yes
Retrieve DTCs from the instrument cluster and rear body control module (RBCM) using the M-MDS.
(See DTC INSPECTION [INSTRUMENT CLUSTER].)
(See DTC INSPECTION [REAR BODY CONTROL MODULE (RBCM)]
No
Replace the EPS control module.
(See STEERING WHEEL AND COLUMN REMOVAL/INSTALLATION.)
3
INSPECT REAR BUMPER
•  Inspect the rear bumper at the blind spot monitoring (BSM) installation area for the following:
?  Installation condition
?  Sticker adhesion
?  Excessive soiling
?  Repairs using putty
•  Is the rear bumper condition normal?
Yes
Go to the next step.
No
Repair or replace malfunctioning parts, or replace the rear bumper.
(See REAR BUMPER REMOVAL/INSTALLATION.)
4
VERIFY THE CONDITION OF THE BLIND SPOT MONITORING (BSM) CONTROL MODULE
•  Remove the rear bumper.
•  Inspect the blind spot monitoring (BSM) control module for the following:
?  Looseness
?  Damage or deformity to the bracket
?  Distortion at vehicle installation surface
•  Is the blind spot monitoring (BSM) control module installation condition normal?
Yes
Go to the next step.
No
Repair or replace the malfunctioning part.
5
VERIFY IF CAUSE OF MALFUNCTION IS IN AFTER-MARKET ELECTRICAL PRODUCT OR ELSEWHERE
•  Remove the after-market electrical product.
•  Verify that the malfunction symptom recurs as stated by the customer.
•  Does the malfunction symptom recur?
Yes
Go to the next step.
No
The after-market electrical product is causing the malfunction.
6
INSPECT BLIND SPOT MONITORING (BSM) CONTROL MODULE (RADAR)
•  Perform the blind spot monitoring (BSM) radar test.
•  Is “TEST PASSED” displayed?
Yes
Temporary malfunction with the radar echo-back.
If the same symptom recurs repeatedly, replace the blind spot monitoring (BSM) control module.
(See BLIND SPOT MONITORING (BSM) CONTROL MODULE REMOVAL/INSTALLATION.)
No
Repair or replace malfunctioning part according to inspection result.
(See BLIND SPOT MONITORING (BSM) RADAR TEST.)