AFS (Adaptive Front-Lighting System)

AFS Control Description

• AFS control controls the headlamp (right) only when the steering wheel is turned rightward, and the headlamp (left) only when the steering wheel is turned leftward.
• AFS control unit detects the vehicle condition necessary for AFS control with the following signals.
  • Steering angle sensor signal (received from steering angle sensor with CAN communication)
  • Engine speed signal (received from ECM with CAN communication)
  • Shift position signal (received from TCM with CAN communication)
  • Low beam status and high beam status (received from IPDM E/R with CAN communication)
  • Vehicle speed signal (received from unified meter and A/C amp. with CAN communication)
• When the operation conditions are satisfied, AFS control unit controls the swivel angle depending on the steering angle and the vehicle speed.

AFS operation condition

• Swivel actuator initialization completed
• Headlamp ON
• While the engine running
• Selector lever position other than "P" or "R"
• Vehicle speed approximately 25 km/h (15.5 MPH) or more (left swivel only; Right swivel activates regardless of the vehicle speed.)

Swivel Actuator Initialization

• AFS control unit performs the swivel actuator initialization when detecting that the engine starts.
  • Swivels the headlamp to the vehicle-center side until it hits the stopper.
  • Returns the swivel angle from the stopper. Completes the initialization with regarding the returned position as the swivel angle 0° (straight-forward position).

Swivel Operation

• AFS control unit transmits the drive signal to the swivel actuator when activation conditions are satisfied. And swivels the headlamp.
  • The swivel starts after steering approximately 20° or more from straight-forward position.
    NOTE: The steering angle differs between right turn and left turn.
  • The swivel angle becomes the maximum angle toward the driving direction if the steering angle is approximately 90° or more depending on the vehicle speed. The swivel angle is maintained by shutting off the drive signal.
  • The swivel starts, and returns to the swivel angle 0° (straight-forward position) when the steering is returned to the straight-forward position.
• AFS control unit returns the swivel angle to the straight-forward position, and stops the swivel regardless of the steering angle if the operation condition is not satisfied while the swivel angle is 0°.

AFS OFF Indicator Lamp

• AFS control unit transmits AFS OFF indicator lamp signal to the combination meter (through the unified meter and A/C amp.) with CAN communication.
• Combination meter turns AFS OFF indicator lamp ON/OFF/blinking according to AFS OFF indicator lamp signal.
  • AFS OFF indicator lamp is turned ON for 1 second for the AFS OFF indicator lamp bulb check when the ignition switch is turned ON. AFS OFF indicator lamp is turned OFF within 1 second when the engine starts.
  • AFS OFF indicator lamp blinks (1 second each) if AFS control unit detects a specific DTC.
    NOTE: Combination meter blinks AFS OFF indicator lamp (approximately 1 second each) if AFS OFF indicator lamp signal is not received from AFS control unit.