Object Detection Description and Operation (VDAAW)

Object Detection Description and Operation (VDAAW)

The vehicle direction alert alarm warning (VDAAW) system is a convenience feature that issues a warning when the system detects that the vehicle has unintentionally crossed a lane marking. The VDAAW system consists of 2 components, the lane departure warning (LDW) module and the VDAAW enable/disable switch, located in the headlamp switch assembly. There are 3 circuits: a dimming backlighting circuit, a switch signal, and an LED indicator circuit. The VDAAW system remembers the last switch setting (ON or OFF) and will return to the same setting for the next ignition cycle. The LDW module is mounted to the windshield. It uses a forward-facing camera to determine lane markings. It is important that the windshield in front of the camera remains clean. Fog on the windshield or on the camera lens can also inhibit proper operation. The system has 3 states of operation:

* Disabled: The system is disabled by the operator, using the disable switch.
* Not Ready To Assist (NRTA): The system is enabled, but not ready to assist when any of the following conditions is true:

- Vehicle speed is less than 35 mph, or the vehicle drops below 30 mph when the system initially was in the ready to assist mode. The system is designed to function at speeds greater than 35 mph.
- The system cannot detect lane markings. This may be because there are no lane markings, as on a country road, or that the lane markings cannot be determined due to snow, rain, or other driving conditions.
- The windshield area in front of the camera or the camera lens is blocked by fog, dirt, damage to the windshield, or other elements that may prevent the camera from detecting lane markings.

* Ready To Assist (RTA): The system is enabled and ready to warn of the unintentional lane crossing. The RTA state is indicated by a green indicator on the instrument panel cluster.


Lane Crossing Alerts
- The system will not give alerts under the following conditions:

* The correct turn signal is activated. An activated turn signal is interpreted as an intentional lane crossing.
* The operator makes a sharp maneuver.
* The operator makes a significant acceleration change or significant steering change during a lane crossing.

- Lane crossing alert consists of the following:

* Three chimes are activated through the vehicle audio system.
* The RTA indicator that is normally green will turn to flashing amber.





VDAAW DIC Messages

The VDAAW system commands the DIC to display the following messages to alert the driver of a system concern or status information:

* LANE DEPARTURE SYSTEM UNAVAILABLE
* SERVICE LANE DEPARTURE SYSTEM