BRIGHTNESS OF BLIND SPOT MONITORING (BSM) WARNING LIGHT IS TOO BRIGHT OR TOO DARK [BLIND SPOT MONITORING (BSM) SYSTEM]

id1503a3020700

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 brightness level of the blind spot monitoring (BSM) warningr light is low in the daytime (headlights off) (correct level at night).

• The brightness level of the blind spot monitoring (BSM) warningr light is high at night (headlights on) (correct level in the daytime).

Possible malfunction

• The blind spot monitoring control module (RH) cannot receive the TNS switch signal.

― TNS switch (light switch) malfunction (stuck)

― Instrument cluster malfunction

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

Diagnostic Procedure

Step

Inspection

Action

1

VERIFY MALFUNCTION (TNS SIGNAL CONDITION)

•  Display the instrument cluster PID I_ILLUMI_M item using the M-MDS.
(See PID/DATA MONITOR INSPECTION [INSTRUMENT CLUSTER].)

•  Is the PID On (Night) indicated when the light switch is in the TNS position?

Yes

Go to Step 3.

No

Go to the next step.

2

INSPECT LIGHT SWITCH

•  Inspect the light switch.
(See LIGHT SWITCH INSPECTION.)

•  Is the light switch normal?

Yes

Perform the DTC inspection for the start stop unit, instrument cluster and the blind spot monitoring (BSM) control module.

(See DTC INSPECTION [START STOP UNIT].)

(See DTC INSPECTION [INSTRUMENT CLUSTER].)

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

No

Replace the light switch.

(See LIGHT SWITCH REMOVAL/INSTALLATION.)

3

VERIFY MALFUNCTION (BRIGHTNESS CONDITION)

•  Display the following blind spot monitoring (BSM) system PIDs and simulation items using the M-MDS:
(See PID/DATA MONITOR INSPECTION [BLIND SPOT MONITORING (BSM) CONTROL MODULE].)

(See ACTIVE COMMAND MODES INSPECTION [BLIND SPOT MONITORING (BSM) CONTROL MODULE].)

PID

―  OP_BRT_R

―  OP_BRT_L

Simulation item

―  WRN_IND_R

―  WRN_IND_L

Note

•  If the blind spot monitoring (BSM) indicator light was turned on by the simulation function, the blind spot monitoring (BSM) indicator light luminosity becomes 92%.

•  Does the PID value indicate 92% when the simulation item is turned on?

Yes

Note

•  If the blind spot monitoring (BSM) system is operating normally, the luminosity of the blind spot monitoring (BSM) indicator light will change according to the light switch condition.

―  Light switch in TNS position: 70%

―  Light switch in position except TNS: 92%

Explain to the customer that the system is normal.

No

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

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

Step	Inspection		Action
1	VERIFY MALFUNCTION (TNS SIGNAL CONDITION) • Display the instrument cluster PID I_ILLUMI_M item using the M-MDS. (See PID/DATA MONITOR INSPECTION [INSTRUMENT CLUSTER].) • Is the PID On (Night) indicated when the light switch is in the TNS position?	Yes	Go to Step 3.
1		No	Go to the next step.
2	INSPECT LIGHT SWITCH • Inspect the light switch. (See LIGHT SWITCH INSPECTION.) • Is the light switch normal?	Yes	Perform the DTC inspection for the start stop unit, instrument cluster and the blind spot monitoring (BSM) control module. (See DTC INSPECTION [START STOP UNIT].) (See DTC INSPECTION [INSTRUMENT CLUSTER].) (See DTC INSPECTION [BLIND SPOT MONITORING (BSM) CONTROL MODULE].)
2		No	Replace the light switch. (See LIGHT SWITCH REMOVAL/INSTALLATION.)
3	VERIFY MALFUNCTION (BRIGHTNESS CONDITION) • Display the following blind spot monitoring (BSM) system PIDs and simulation items using the M-MDS: (See PID/DATA MONITOR INSPECTION [BLIND SPOT MONITORING (BSM) CONTROL MODULE].) (See ACTIVE COMMAND MODES INSPECTION [BLIND SPOT MONITORING (BSM) CONTROL MODULE].) PID ― OP_BRT_R ― OP_BRT_L Simulation item ― WRN_IND_R ― WRN_IND_L Note • If the blind spot monitoring (BSM) indicator light was turned on by the simulation function, the blind spot monitoring (BSM) indicator light luminosity becomes 92%. • Does the PID value indicate 92% when the simulation item is turned on?	Yes	Note • If the blind spot monitoring (BSM) system is operating normally, the luminosity of the blind spot monitoring (BSM) indicator light will change according to the light switch condition. ― Light switch in TNS position: 70% ― Light switch in position except TNS: 92% Explain to the customer that the system is normal.
3		No	Replace the blind spot monitoring (BSM) control module (LH). (See BLIND SPOT MONITORING (BSM) CONTROL MODULE REMOVAL/INSTALLATION.)