RCTA INDICATOR LIGHT DOES NOT FLASHES WHILE UNDER RCTA INDICATOR LIGHT-FLASHING CONDITIONS [BLIND SPOT MONITORING (BSM)]

id0903d9018900

Description
RCTA indicator light does not flash under flash conditions
•  The RCTA indicator light does not flash even though under RCTA indicator light flash conditions (R position (ATX)/R gear (MTX), and target vehicle detection).
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.
•  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)

Diagnostic Procedure

Step

Inspection

Action
1
DETERMINE IF MALFUNCTION CAUSE IS RCTA INDICATOR LIGHT
•  Verify the flash of the BSM indicator light.
•  Does the BSM indicator light flash under RCTA indicator light flash conditions?
Yes
Go to the next step.
No
Go to the symptom troubleshooting BSM INDICATOR LIGHT DOES NOT ILLUMINATE WHILE UNDER BSM INDICATOR LIGHT-ILLUMINATION CONDITIONS [BLIND SPOT MONITORING (BSM)].
2
VERIFY BSM CONTROL MODULE DTCs
•  Retrieve the BSM control module DTCs using the M-MDS.
•  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 under flashing conditions, does the BSM indicator light flash?
Yes
Replace the audio unit.
(See AUDIO UNIT REMOVAL/INSTALLATION.)
No
Go to the next step.
4
INSPECT BSM CONTROL MODULE
•  Inspect the BSM control module on the side that is malfunctioning.
•  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.)