DRIVER ATTENTION ALERT SYSTEM
id151000002600
Outline
• The driver attention alert system warns the driver and advises the driver to take a break using the warning display and sound if it detects the driver's lack of attentiveness.
• The driver attention alert system activates the warning if the driver's attention decreases due to driving long distances for long periods causing the vehicle to sway.
Structural view
Function
• The driver attention alert system warns the driver when the connectivity master unit (CMU) determines that the driver’s attention is decreasing based on the driving characteristics and continuous driving time.
Driving characteristics calculation
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• The connectivity master unit (CMU) sets the driver’s driving characteristics when the vehicle has been driven at approx. 65 km/h {40 mph} to 140km/h {87 mph} for approx. 20 min.
• When any of the following conditions is met, the connectivity master unit (CMU) clears the determined driving characteristics data.
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― Vehicle is stopped for 15 min or more
― Vehicle is driven at less than approx. 65 km/h {40 mph} for 30 min or more
― Switch the main power OFF
Driving characteristics monitoring
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• The connectivity master unit (CMU) constantly updates the driving characteristics data when all of the following conditions are met.
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― Vehicle speed calculated by connectivity master unit (CMU) based on vehicle speed signal received from electronically controlled brake unit via CAN communication is approx. 65 km/h {40 mph} or more and less than approx. 140 km/h {87 mph}
― 60 min or more have elapsed since the driver started driving
― FSC does not recognize a sharp curve
― FSC recognizes white lines
― Vehicle is not changing lanes
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• The connectivity master unit (CMU) calculates continuous driving time.
Warning
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• The connectivity master unit (CMU) sends a warning request signal to the instrument cluster and the control module (BCM) if the driver’s lack of attentiveness exceeds the threshold.
• When the instrument cluster receives a warning request signal from the connectivity master unit (CMU), it displays a message on the multi-information display recommending the driver to take a break, and the BCM activates the warning sound from the notification and warning speaker (front).
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― If the system does not operate normally, the connectivity master unit (CMU) sends a malfunction signal to the instrument cluster, and the instrument cluster displays a malfunction message indicating that the driver attention alert does not operate on multi-information display.
• Once the warning is activated (warning indication for approx. 5 s, warning sound for approx. 1 s), no warning will be activated for approx. 60 min.
Personalization feature
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• The driver attention alert system can be switched between ON (operational)/OFF (non-operational) (initial setting is on (operational)). For details on personalization features, refer to [PERSONALIZATION FEATURES] in the workshop manual.
System wiring diagram
Operation
1. The connectivity master unit (CMU) calculates the driving characteristics (1) based on the lane information from the forward sensing camera (FSC), the steering angle signal from EPS, the yaw rate signal and the wheel speed signal from the electronically controlled brake unit.
2. The connectivity master unit (CMU) calculates the driving time (2).
3. The connectivity master unit (CMU) determines the driver’s attention decreases (3).
4. The connectivity master unit (CMU) sends the warning request signal (4) to the instrument cluster and the body control module (BCM).
5. When the instrument cluster receives the warning request signal (4) from the connectivity master unit (CMU) via the body control module (BCM), it displays the warning display on the multi-information display (5).
6. When the body control module (BCM) receives the warning request signal (4) from the connectivity master unit (CMU) via the body control module (BCM), it outputs the warning sound signal to the Notification and Warning Speaker (Front) (4) and the Notification and Warning Speaker (Front) sounds a warning.
