BSM INDICATOR LIGHT DOES NOT ILLUMINATE WHILE UNDER BSM INDICATOR LIGHT-ILLUMINATION CONDITIONS [BLIND SPOT MONITORING (BSM) CONTROL MODULE CONNECTOR 10-PIN TYPE]

id0903n2015400

Description
BSM indicator light does not illuminate while under BSM indicator light-illumination conditions
•  The BSM indicator light does not illuminate despite satisfying the conditions to illuminate the BSM indicator light (vehicle speed 10 km/h {6.2 mph} or more, turn signals off, and vehicle in warning zone).
Possible Causes
•  The BSM control module mistakenly recognizes a vehicle as being outside of the warning zone when it actually inside of it.
―  Radar (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.
•  Problem with rear bumper such as dirt on radar emitting/receiving area, application of stickers (including transparent types), repairs using putty application.
―  BSM control module does not receive echo-back correctly
•  BSM control module (radar) malfunction
•  Problem with rear bumper such as dirt on 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 dirt 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 BSM system
•  Malfunction in BSM indicator light related parts
―  Open circuit in wiring harness between BSM indicator light and BSM control module
―  Open circuit in wiring harness or poor ground between BSM control module and ground
―  BSM indicator light malfunction

Diagnostic Procedure

Step

Inspection

Result

Action
1
INSPECT IF MALFUNCTION IS IN INPUT SIGNAL OR BSM CONTROL MODULE
•  Monitor the following PIDs on the suspected side of the 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 SENSOR
•  Inspect the steering angle sensor.
•  Is the steering angle sensor normal?
Yes
Replace the instrument cluster.
(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)
No
Replace the steering angle sensor.
(See STEERING WHEEL AND COLUMN REMOVAL/INSTALLATION.)
3
INSPECT REAR BUMPER
•  Inspect the rear bumper at the BSM installation area for the following:
―  Installation condition
―  Sticker adhesion
―  Excessive dirt
―  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 BSM CONTROL MODULE
•  Remove the rear bumper.
•  Inspect the BSM control module for the following:
―  Looseness
―  Damage or deformity to the bracket
―  Distortion at vehicle installation surface
•  Is the 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 BSM CONTROL MODULE (RADAR)
•  Perform the BSM radar test.
•  Is “TEST PASSED” displayed?
Yes
Temporary malfunction with the radar echo-back.
If the same symptom recurs repeatedly, replace the BSM control module.
(See BLIND SPOT MONITORING (BSM) CONTROL MODULE REMOVAL/INSTALLATION [BLIND SPOT MONITORING (BSM) CONTROL MODULE CONNECTOR 10-PIN TYPE].)
No
Repair or replace malfunctioning part according to inspection result.
(See BLIND SPOT MONITORING (BSM) RADAR TEST [BLIND SPOT MONITORING (BSM) CONTROL MODULE CONNECTOR 10-PIN TYPE].)