BSM OFF INDICATOR LIGHT DOES NOT ILLUMINATE WHEN THE IGNITION IS SWITCHED TO ON [BLIND SPOT MONITORING (BSM)]

id0903d9015000

Description
BSM OFF indicator light does not illuminate when the ignition is switched to ON
•  BSM OFF indicator light does not illuminate when the ignition is switched to ON.
•  The BSM control module does not communicate with the M-MDS.
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 (LH) does not initiate
―  Open or short circuit in BSM control module (LH) power supply circuit (open or short to power supply circuit in wiring harness between C/U IG1 15A fuse and BSM control module (LH) terminal I)
―  Open circuit in BSM control module (LH) ground circuit (open circuit in wiring harness between BSM control module (LH) and ground, poor contact at ground point)
―  BSM control module (LH) malfunction
•  Instrument cluster does not illuminate BSM OFF indicator light
―  Instrument cluster malfunction

Diagnostic Procedure

Step

Inspection

Result

Action
1
INSPECT BSM CONTROL MODULE (LH) POWER SUPPLY VOLTAGE
•  Switch the ignition ON (engine off or on).
•  Measure the voltage at BSM control module (LH) terminal I.
•  Is the voltage B+?
Yes
Go to the next step.
No
Inspect the C/U IG1 15A fuse.
•  If the fuse is damaged:
―  Replace the fuse.
•  If the fuse is normal:
―  Refer to the wiring diagram and verify if there is a common connector between C/U IG1 15A fuse and BSM control module (LH) terminal I.
If there is a common connector:
•  Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for open or short circuit to determine the malfunctioning location.
•  Repair or replace the malfunctioning location.
If there is no common connector:
•  Repair or replace the wiring harness which has an open or short circuit.
Go to the next step.
2
INSPECT BSM CONTROL MODULE (LH) GROUND CIRCUIT
•  Switch the ignition off.
•  Verify that there is continuity between the BSM control module (LH) terminal J and ground.
•  Is there continuity?
Yes
Go to the next step.
No
Inspect and repair the ground point.
Repair or replace for an open circuit between the BSM control module (LH) and ground.
3
INSPECT IF MALFUNCTION IS IN INSTRUMENT CLUSTER OR BSM CONTROL MODULE (LH)
•  Turn off the BSM OFF indicator light using the M-MDS instrument cluster active command modes WL+IL.
•  Does the BSM OFF indicator light turn on according to the active command modes?
Yes
Replace the BSM control module (LH).
(See BLIND SPOT MONITORING (BSM) CONTROL MODULE REMOVAL/INSTALLATION.)
No
Replace the instrument cluster.
(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)