TURN SIGNAL AND HAZARD WARNING LAMP SYSTEM

XENON TYPE

System Diagram

OUTLINE

Turn signal and the hazard warning lamp is controlled by combination switch reading function and the flasher control function of BCM.

TURN SIGNAL LAMP OPERATION

BCM detects the combination switch condition by the combination switch reading function.
BCM supplies voltage to the right (left) turn signal lamp circuit when the ignition switch is turned ON and the turn signal switch is in the right (left) position. BCM blinks the turn signal lamp.

HAZARD WARNING LAMP OPERATION

BCM supplies voltage to both turn signal lamp circuit when the hazard switch is turned ON. BCM blinks the hazard warning lamp.

TURN SIGNAL INDICATOR LAMP AND TURN SIGNAL SOUND OPERATION

BCM transmits the turn signal indicator lamp signal to the combination meter with CAN communication while the turn signal lamp and the hazard warning lamp operating.
Combination meter outputs the turn signal sound with the integrated buzzer while blinking the turn signal indicator lamp according to the turn signal indicator lamp signal.

HIGH FLASHER OPERATION (FAIL-SAFE)

BCM detects the turn signal lamp circuit status by the terminal current value.
BCM increases the turn signal lamp blinking speed if the bulb or harness open is detected with the turn signal lamp operating.
NOTE：
The blinking speed is normal while operating the hazard warning lamp.

1.	Hazard switch	2.	Front turn signal lamp	3.	Combination switch
4.	Rear turn signal lamp	5.	BCM	6.	Turn signal indicator lamp
A.	Dash side lower (passenger side)	B.	On the combination meter

Part		Description
BCM		Detects each switch condition by the combination switch reading function. Judges the blinks of the turn signal lamp and the hazard warning lamp from each switch status. The applicable turn signal lamp blinks. Requests the turn signal indicator lamp blink to the combination meter (with CAN communication).
Combination switch (Lighting & turn signal switch)		Refer to System Diagram.
Hazard switch (Set-up switch)		Refer to Description.
Combination meter (Turn signal indicator lamp and buzzer)		Blinks the turn signal indicator lamp and outputs the turn signal operating sound with integrated buzzer according to the request from BCM (with CAN communication).