EXTERIOR LAMPS




Construction diagram








Specifications


Item
Headlamp assembly <Vehicles with halogen type headlamp>
High-beam W
60 (HB3)
Low-beam W
55 (H7)
Position lamp W
5 (W5W)
Front turn-signal lamp W
21 (PY21W)
Headlamp assembly <Vehicles with discharge type headlamp>
High-beam W
60 (HB3)
Low-beam W
35 (D4S)
Position lamp W
5 (W5W)
Front turn-signal lamp W
21 (PY21W)
Front fog lamp
Front fog lamp (vehicles without daytime running lamp) W
55 (H11)
Front fog lamp (vehicles with daytime running lamp) W
35 (H8)
Daytime running lamp
Daytime running lamp W
13 (P13W)
Rear fog lamp W
21 (W21W)
Back-up lamp W
21 (W21W)
Side turn-signal lamp
Fender panel type W
5
Door mirror type
LED type
Rear combination lamp
Stop/tail W
21 (P21/5W)
Rear turn-signal W
21 (PY21W)
High-mounted stop lamp
Integrated in tailgate spoiler
LED type
Licence plate lamp W
5 (W5W)
note The brackets ( ) show the bulb type.

Headlamp manual levelling system



The beam direction of the headlamps changes according to the number of passengers and the amount of load. The headlamp manual levelling function is a system that allows the driver to change the direction of headlamp beam so that the drivers of oncoming cars are not dazzled by the headlamps. The headlamp levelling switch allows changing the direction in five steps: 0 to 4.

Relationship between the switch positions and the number of passengers/loads



<5-seating>
Passenger and load








One or two passengers
Five passengers
Five passengers and heavy loads
Driver and heavy loads
Switch position
0
1
2 or 3
4

<7-seating>
Passenger and load










One or two passengers
Four passengers (front seat and third seat)
Seven passengers
Seven passengers and heavy loads
Driver and heavy loads
Switch position
0
1
2
3
4
note Each switch position is for reference. In each switch position, when the headlamp beam is too high, turn the switch to one-level higher position.

Operation




1.The headlamp levelling switch increases the resistance as it is turned from 0 to 4. Turning the headlamp levelling switch changes the voltage at point A. When the headlamp levelling switch is turned from 0 to 4, the voltage at point A decreases. Upon detection of this voltage change, the headlamp levelling unit turns the motor to lower the beam direction. At this time, the resistance of the variable resistor in the headlamp assembly changes, and the voltage at point B decreases gradually. When the voltages at points A and B become equal, the headlamp levelling unit stops the motor.
2.Turning the headlamp levelling switch from 4 to 0 increases the voltage at point A, and then the headlamp levelling unit turns the motor in the direction opposite to that mentioned in Item 1, increasing the voltage at point B. When the voltages at points A and B become equal, the headlamp levelling unit stops the motor.
3.The headlamp levelling unit detects voltage changes caused by headlamp levelling switch operation, and turns the motor to change the directions of the headlamp reflectors for the adjustment of the headlamp beam direction.

Headlamp automatic levelling system


The beam direction of the headlamps (vertical angle) changes according to the number of passengers and the amount of load. The headlamp automatic levelling system is a system that automatically controls the beam direction of headlamps (up and down angle) when parking or travelling with stable vehicle attitude so that the drivers of oncoming cars and of cars driving in front are not dazzled by the headlamp beam that is directed upwards.

Operational Description


The beam direction of headlamps is automatically controlled according to driving conditions as described in the table below.
Vehicle condition
Control content
When parking
When the engine is stopped with the headlamp (low-beam) ON or when the vehicle is stopped with the headlamp (low-beam) ON and the accelerator pedal is released, the ETACS-ECU controls the beam direction according to the height sensor values of the change in load resulting from getting on/off of passengers or loading/unloading of loads.
When driving at a constant speed
When a vehicle starts on curb, the travelling vehicle posture changes from the posture during parking, so that the beam direction changes. To control the improper beam direction caused by such vehicle attitude change, the ETACS-ECU controls the beam direction while travelling with stable vehicle attitude. This beam direction control while travelling with stable vehicle attitude is performed only once between a vehicle stop and the next stop. When driving is started on a gravel or rough road, the beam direction control is activated after the vehicle attitude becomes stable on a paved road.

System component and function




Parts name
Functional description
Ignition switch
Supplies power to the ETACS-ECU when the ignition switch is in the ON position.
Height sensor (front)
Detects the elongation/contraction of the front suspension and transmits the signal to the ETACS-ECU.
Height sensor (rear)
Detects the elongation/contraction of the rear suspension and transmits the signal to the ETACS-ECU.
Headlamp assembly (integrating headlamp automatic levelling motor)
Drives the headlamp reflector by receiving signals from the ETACS-ECU.
Combination meter
Send an odometer indication value to the ETACS-ECU.
ABS-ECU or ASC-ECU
Transfers the vehicle travel distance information to the ETACS-ECU.
Engine-ECU
Transfers engine speed signals and accelerator pedal position signals to the ETACS-ECU.
ETACS-ECU

  • Transfers lighting switch position signals, all door switch ON/OFF signals, tailgate latch switch ON/OFF signals, hazard warning lamp switch ON/OFF signals, headlamp (low-beam) ON/OFF status signals.
  • Controls the headlamp automatic levelling motor integrated in the headlamp assembly based on the signals form switches and sensors to control the beam direction according to the vehicle posture.

Diagnosis connector
Outputs diagnosis codes.

System block diagram