Description

BSM indicator light illuminates while not under light-illumination conditions

• The BSM indicator light illuminates, but the conditions to illuminate the BSM indicator light are not satisfied (vehicle speed above 32 km/h {20 mph} or more, turn signals off, and vehicle in warning zone).

Possible Causes

• The BSM control module recognizes a vehicle as being inside the warning zone when it is actually outside of it.

• Radar (BSM control module integrated) is emitted outside of warning zone (deviates from warning zone)

• Damage, deformity or looseness to installation bracket or vehicle frame (including moderate impacts)

• Malfunction in steering angle signal (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.

• After-market electrical parts interfere with BSM system

• Malfunction in BSM indicator light related parts

• Short to power supply circuit in wiring harness between BSM control module and BSM indicator light

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.

  (See PID/DATA MONITOR INSPECTION [BLIND SPOT MONITORING (BSM)].)

• 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.

  (See ELECTRIC POWER STEERING (EPS) ON-BOARD DIAGNOSIS.)

• Is the monitoring value normal?

Yes

Replace the instrument cluster.

(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)

No

Replace the EPS control module.

(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 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 BSM CONTROL MODULE

• Remove the rear bumper.

  (See REAR BUMPER REMOVAL/INSTALLATION.)

• 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 TROUBLE 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.

  (See 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 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.)