Mazda RX-8 2004 Service Highlights page 457

HEADLIGHT AUTO LEVELING SYSTEM OPERATION
Varying Passenger and Cargo Conditions Operation
1. According to the fluctuation of the suspension, the auto leveling sensors installed in the front and rear of the
vehicle send a signal to the auto leveling control module.
2. When a difference between two of the signals input from the auto leveling sensors is detected, the auto leveling
control module verifies the vehicle attitude, then calculates the amount of optical axis adjustment. The auto
leveling control module compares the actual and required positions of the reflector, then inputs a command
signal to the headlight leveling actuator.
ZERO SETTING
OPTICAL AXIS
LOW
ZERO
REFERENCE
HIGH
FRONT AUTO
LEVELING SENSOR
ABS HU/CM
OR
DSC HU/CM
Operation When Driving
1. When the auto leveling control module detects the vehicle is running at a constant vehicle speed between 30—
180 km/h for 3 s continuously while the headlights are on, the average value of the vehicle attitude during the
period is calculated and the optical axis is adjusted. (The adjustment control is operated only once per each
period of driving.)
Note
• When the ignition switch is turned to the ON position, it is normal to hear the headlight leveling actuator
operating for a few seconds, as it verifies system operating conditions.
End Of Sie
LIGHTING SYSTEMS
LOW
ZERO
REFERENCE
HIGH
REAR AUTO
LEVELING SENSOR
FRONT AUTO
LEVELING SENSOR
(1)
AUTO LEVELING CONTROL MODULE
DIFFERENCE BETWEEN
TWO VOLTAGE SIGNALS
VEHICLE ATTITUDE
OPTICAL AXIS
ADJUSTMENT AMOUNT
(2)
HEADLIGHT LEVELING
ACTUATOR (LH)
LARGE PASSENGER OR CARGO WEIGHT
OPTICAL AXIS
OPTICAL AXIS
ADJUSTMENT
AMOUNT
LOW
ZERO
REFERENCE
HIGH
REAR AUTO
LEVELING SENSOR
(1)
(2)
HEADLIGHT LEVELING
ACTUATOR (RH)
CHU091801052S09
VEHICLE
ATTITUDE
LOW
ZERO
REFERENCE
HIGH
INSTRUMENT
CLUSTER
CHU0918S101
09–18–7
09–18