AFS (Adaptive Front-Lighting System)

AFS Control Description

• AFS control unit 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.

• AFS switch signal
• Vehicle speed signal (received from combination meter via CAN communication)
• Steering angle sensor signal (received from steering angle sensor via CAN communication)
• Shift position signal (received from TCM via CAN communication)
• Low beam status signal (received from IPDM E/R via CAN communication)
• Engine speed signal (received from ECM via 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
• AFS "ON" (AFS OFF indicator lamp "OFF")
• 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 via 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 turns ON when AFS is switched to "OFF" by operating AFS switch.
• 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.