System Description

SYSTEM DIAGRAM

Parts name	Description
Head Up Display unit	Refer to Head Up Display Unit.
Head Up Display main switch	Refer to Head Up Display Main Switch.
ADAS control unit 2	Transmits the display signal of drive assistance and warning to the Head up Display unit via CAN communication.
ECM	Transmits the ASCD status to the Head Up Display unit via CAN communication.
BCM	Transmits the following signals to the Head Up Display unit via CAN communication. Auto ACC status signal Vehicle status signal
ABS actuator and electric unit (control unit)	Transmits the odometer signal to the Head Up Display unit via CAN communication.
Keyless operation key unit	Transmits the user identification signal to the Head Up Display unit via CAN communication.
IPDM E/R	Transmits the battery voltage signal to the Head Up Display unit via CAN communication.
AV control unit	Transmits the key link activation status signal to the Head Up Display unit via CAN communication.
Combination meter	Transmits the following signals and HUD setting signal to the Head Up Display unit via CAN communication. Vehicle speed display signal HUD setting signal The navigation signal received from the AV control unit is transmitted to the Head Up Display unit via AV communication.

Head Up Display Unit Input Signal

CAN communication signal

Transmit unit	Signal name
ADAS control unit 2	Display signal
ECM	ASCD status signal
BCM	Auto ACC status signal
BCM	Vehicle status signal
ABS actuator and electric unit (control unit)	Odometer signal
Keyless operation key unit	User identification signal
IPDM E/R	Battery voltage signal
AV control unit	Key link activation status signal
Combination meter	Vehicle speed display signal
Combination meter	HUD setting signal

AV Communication signal (Combination meter → Head Up Display Unit)

Transmit unit	Signal name
Combination meter	Navigation signal

DESCRIPTION

The Head Up Display (HUD) displays information on the vehicle speed and driving assistance system on the windshield glass, and supports safe driving by suppressing the burden due to the movement of the driver's eyes.
The Head Up Display unit receives necessary signals from each ECU via CAN communication and local communication.

Operation

When the ignition switch is ON, pushing the main switch activates Head Up Display.
Head Up Display projects display on the windshield glass.
Image focus on 2.1 m (6.89 ft) from driver's eye point.

	Head Up Display unit	Windshield glass
	Eye point	Virtual image display
C.	2.1 m (6.89 ft)

Structure

The Head Up Display unit projects the image to the windshield glass by reflecting the image of the TFT liquid crystal display on the concave mirror. Also, by manipulating the angle of the concave mirror, the projection position on the windshield glass can be adjusted.

Head Up Display unit	Concave mirror	Concave mirror
TFT liquid crystal display
: Projection path

Display Item

The Head Up Display (HUD) can display one or more of the following features.
The Head Up Display unit can cause an interrupt on the HUD display to indicate a warning, based on signals received from each unit.

No.	Display		Description
	Message display		Displays various information for the driver Displays the operation request when the MI-PILOT Assist system is operating
	Vehicle speed display		Always display the vehicle speed
	Driving Aids	ASCD display	Displays setting vehicle speed during ASCD operation
		ACC display	Displays information on setting vehicle speed and presence/absence of preceding vehicle during ACC operation
		MI-PILOT Assist system display	Displays setting MI-PILOT Assist system status during MI-PILOT Assist system operation
		LDW system display	Displays LDW system display during LDW system operation
		LDP system display	Display LDP system display during LDP system operation
		PFCW system display	Display PFCW display during PFCW operation
	Turn by Turn display		Display arrows at intersection with navigation guidance and guide traveling direction
	TSR system display		Display TSR system display during TSR system operation
	Interrupt display	MI-PILOT Assist system warning display	Display MI-PILOT Assist system display during MI-PILOT Assist system operation
		AEB warning display	Display AEB warning display during AEB operation
		Turn by Turn display	Display arrows at intersection with navigation guidance and guide traveling direction
		Audio operation display	Display audio operation display during audio switch operation

note

The items displayed depend on vehicle specifications.
When the ignition switch is turned ON, only vehicle speed is displayed.
Emergency information may display even if the Head Up Display is turned off.
The display position, display rotation, display brightness, and display setting adjustment of the Head Up Display can be set on the setting screen of the combination meter. Refer to Switch Name and Function.

Automatic Dimming Function

The Head Up Display unit reads the illuminance sensor value and adjusts the brightness of the display automatically.

note	The brightness of the display can be manually adjusted on the combination meter setting screen. Refer to Switch Name and Function.