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

id1503b3020700

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) CONTROL MODULE (Except Australian specs.)].)

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

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 [Except Australian specs.]] in the technical guide.

• 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 (Except Australian specs.)].)

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 (Except Australian specs.)].)

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

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 [Except Australian specs.].)

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