Description

RCTA indicator light flashes under conditions other than flashing conditions

• The RCTA indicator light flashes under conditions other than the RCTA indicator light flashing conditions (R position (ATX)/R gear (MTX), and target vehicle detection).

Possible Causes

• BSM control module mis-detects another vehicle or mis-estimates the time that another vehicle will reach the detection line

• Deviation of radar emission direction in BSM control module (emits radar outside of blind spot, or to adjacent lane)

• Damage, deformity or looseness of vehicle frame (including moderate impacts)

• Incorrect installation of rear bumper, soiling of radar emitting/receiving area, application of stickers (including transparent types), repairs using putty application

• Effect of non-genuine, after-market electronic device installation

NOTE:

• If there is a thick moisture film (such as condensation) on the rear bumper, the BSM control module may not receive echo-back correctly.

• The BSM control module may not receive echo-back correctly due to the negative effect of a non-genuine bumper or paint, or installation of after-market parts.

• RCTA indicator light flash circuit malfunction

• Audio unit (with color LCD display) internal malfunction (RCTA indicator light flash circuit malfunction)

• BSM control module (LH) internal malfunction (RCTA indicator light flash circuit malfunction)

• BSM control module (LH) malfunction (mistaken flash request output)

Step

Inspection

Action

1

DETERMINE IF MALFUNCTION CAUSE IS RCTA INDICATOR LIGHT

• Verify the flash of the BSM indicator light.

• When the RCTA indicator light flashes, does the BSM indicator light also flash?

Yes

Go to the symptom troubleshooting BSM INDICATOR LIGHT ILLUMINATES WHILE NOT UNDER LIGHT-ILLUMINATION CONDITIONS [BLIND SPOT MONITORING (BSM)].

(See BSM INDICATOR LIGHT ILLUMINATES WHILE NOT UNDER LIGHT-ILLUMINATION CONDITIONS [BLIND SPOT MONITORING (BSM)].)

No

Go to the next step.

2

VERIFY BSM CONTROL MODULE DTCs

• Retrieve the BSM control module DTCs using the M-MDS.

  (See DTC INSPECTION [BLIND SPOT MONITORING (BSM)].)

• Are any DTCs displayed?

Yes

Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.

(See DTC TABLE [BLIND SPOT MONITORING (BSM)].)

No

Go to the next step.

3

DETERMINE IF MALFUNCTION CAUSE IS AUDIO UNIT

• When the RCTA indicator light is flashing under conditions other than the flashing conditions, does the BSM indicator light flash?

Yes

Go to the next step.

No

Replace the audio unit.

(See AUDIO UNIT REMOVAL/INSTALLATION.)

4

INSPECT BSM CONTROL MODULE

• Inspect the BSM control module on the side that is malfunctioning.

  (See BLIND SPOT MONITORING (BSM) CONTROL MODULE INSPECTION.)

• Is the BSM control module normal?

Yes

The possibility that the BSM control module was temporarily unable to receive echo-back correctly can be considered.

If the same symptom recurs repeatedly, replace the BSM control module.

(See BLIND SPOT MONITORING (BSM) CONTROL MODULE REMOVAL/INSTALLATION.)

No

Replace the BSM control module.

(See BLIND SPOT MONITORING (BSM) CONTROL MODULE REMOVAL/INSTALLATION.)