BLIND SPOT MONITORING (BSM) OFF INDICATOR LIGHT FALSE ILLUMINATION [BLIND SPOT MONITORING (BSM) SYSTEM]

id1503a3020000

Note

• If there is any vehicle malfunction complaint lodged by a customer, first perform malfunction diagnosis according to the troubleshooting procedure. (See FOREWORD [BLIND SPOT MONITORING (BSM) SYSTEM].)

Description

• The blind spot monitoring (BSM) OFF indicator light turns on while not under illumination conditions.

Possible malfunction

• The blind spot monitoring (BSM) control module (LH) cannot verify the blind spot monitoring (BSM) switch ON/OFF.

― Blind spot monitoring (BSM) switch-related malfunction

― Blind spot monitoring (BSM) control module (LH) malfunction

• The instrument cluster cannot turn off the blind spot monitoring (BSM) OFF indicator light.

― Malfunction in instrument cluster (illumination circuit malfunction)

Diagnostic Procedure

Step

Inspection

Action

1

DETERMINE IF CAUSE OF MALFUNCTION IS BLIND SPOT MONITORING (BSM) SWITCH OR BLIND SPOT MONITORING (BSM) INDICATOR LIGHT

•  Display the blind spot monitoring (BSM) PID MAIN_SW item using the M-MDS.
(See PID/DATA MONITOR INSPECTION [BLIND SPOT MONITORING (BSM) CONTROL MODULE].)

•  Switch the blind spot monitoring (BSM) switch ON/OFF.

•  Does the PID MAIN_SW monitoring value turn on and off according to the blind spot monitoring (BSM) switch ON/OFF operation?

Yes

Go to Step 3.

No

Go to the next step.

2

BLIND SPOT MONITORING (BSM) SWITCH INSPECTION

•  Inspect the blind spot monitoring (BSM) switch.
(See BLIND SPOT MONITORING (BSM) SWITCH INSPECTION.)

•  Is the blind spot monitoring (BSM) switch normal?

Yes

Go to the next step.

No

Replace the blind spot monitoring (BSM) switch.

(See BLIND SPOT MONITORING (BSM) SWITCH REMOVAL/INSTALLATION.)

3

DETERMINE IF MALFUNCTION CAUSE IS INSTRUMENT CLUSTER OR BLIND SPOT MONITORING (BSM) CONTROL MODULE (LH)

•  Illuminate all the indicator lights and warning lights in the instrument cluster using the simulation function WL+IL in the M-MDS instrument cluster.
(See ACTIVE COMMAND MODES INSPECTION [INSTRUMENT CLUSTER].)

•  Did the blind spot monitoring (BSM) OFF indicator light turn on.

Yes

Replace the blind spot monitoring (BSM) control module (LH).

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

No

Replace the instrument cluster.

(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)

Step	Inspection		Action
1	DETERMINE IF CAUSE OF MALFUNCTION IS BLIND SPOT MONITORING (BSM) SWITCH OR BLIND SPOT MONITORING (BSM) INDICATOR LIGHT • Display the blind spot monitoring (BSM) PID MAIN_SW item using the M-MDS. (See PID/DATA MONITOR INSPECTION [BLIND SPOT MONITORING (BSM) CONTROL MODULE].) • Switch the blind spot monitoring (BSM) switch ON/OFF. • Does the PID MAIN_SW monitoring value turn on and off according to the blind spot monitoring (BSM) switch ON/OFF operation?	Yes	Go to Step 3.
1		No	Go to the next step.
2	BLIND SPOT MONITORING (BSM) SWITCH INSPECTION • Inspect the blind spot monitoring (BSM) switch. (See BLIND SPOT MONITORING (BSM) SWITCH INSPECTION.) • Is the blind spot monitoring (BSM) switch normal?	Yes	Go to the next step.
2		No	Replace the blind spot monitoring (BSM) switch. (See BLIND SPOT MONITORING (BSM) SWITCH REMOVAL/INSTALLATION.)
3	DETERMINE IF MALFUNCTION CAUSE IS INSTRUMENT CLUSTER OR BLIND SPOT MONITORING (BSM) CONTROL MODULE (LH) • Illuminate all the indicator lights and warning lights in the instrument cluster using the simulation function WL+IL in the M-MDS instrument cluster. (See ACTIVE COMMAND MODES INSPECTION [INSTRUMENT CLUSTER].) • Did the blind spot monitoring (BSM) OFF indicator light turn on.	Yes	Replace the blind spot monitoring (BSM) control module (LH). (See BLIND SPOT MONITORING (BSM) CONTROL MODULE REMOVAL/INSTALLATION.)
3		No	Replace the instrument cluster. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)