Driver Interface Unit
Warning: The VORAD VS-400 System is intended solely as an aid for an alert and conscientious professional driver. It is not intended to be relied upon to operate a vehicle. Use the system in conjunction with rearview mirrors and other instruments to safely operate the vehicle. Operate a vehicle equipped with the VS-400 System in the same safe manner as if the CWS were not present.
The VS-400 System is not a substitute for safe, normal driving procedures, nor will it compensate for any driver impairment such as drugs, alcohol, or fatigue.
The VS-400 System may provide little or no warning of hazards such as pedestrians, animals, oncoming vehicles, or cross traffic.
Failure to drive safely and use the system properly could result in personal injury and/or death and severe property damage.
The VORAD VS-400 system is an on-board radar system that monitors traffic conditions, warning the driver of potentially hazardous driving situations.
The collision warning system (CWS) tracks objects ahead of the vehicle, warning the driver with visual and audible indicators whenever following distances become unsafe.
SmartCruise® adjusts the vehicle's cruise speed in order to match the speed of traffic ahead, allowing the driver to maintain a safe following distance while cruise control is engaged.
The optional side object detection system warns of unsafe lane changes by detecting vehicles that may be difficult to see in adjacent lanes.
The VORAD VS-400 system performs in fog, rain, snow, dust, smoke, and darkness. The VS-400 system becomes active whenever the ignition key is switched to ON.
The driver interface unit (DIU) provides visual and audible alerts, along with system status information. The DIU also provides an interface for changing system settings. Menu selections are made by pressing the up and down arrow buttons, and the OK button. See Fig..
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Fault Indicator
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Info Indicator
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Following Distance Lights
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Ambient Light Sensor
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Collision Alert Lights
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User Interface Keypad
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Graphic Display
Fig. 1, Driver Interface Unit (DIU)
The following warning and indicator lights illuminate on the DIU:
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Red: illuminates with the collision alert
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Yellow: illuminates with 3-, 2-, and 1-second following distance alerts
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Orange: illuminates when a system failure occurs
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Blue: illuminates when information is available
Immediately after the ignition switch is turned to ON, the DIU initializes a self-test routine. During the initialization, the VORAD screen displays and all lamps illuminate for approximately three seconds, along with a power-up tone. When the initialization is complete, the DIU displays the VS-400 system configuration screen. See Fig..
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Configured for CWS only
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Configured for CWS and SmartCruise
Fig. 2, System Configuration Screens
Menu Selections
Important: The display of a menu item is overridden whenever conditions require an alert or collision warning to be displayed.
After initialization, the menu screen is displayed. Scroll to the desired menu item by pressing an arrow button, then press the OK button to select the item. See Fig.. If the driver does not make a selection within 30 seconds, or the vehicle begins to move, the DIU reverts to the system status display.
Fig. 3, Menu Screen
The display of any menu item is overridden whenever conditions require an alert or collision warning to be displayed.
Demo (vehicle must be stationary)
When the vehicle is stationary and Demo mode is selected, the DIU will demonstrate the meaning of all LED and screen displays, including alert messages and sound warnings. Scroll through the demo screens by pressing the down arrow. Pressing any other key exits Demo mode.
Volume
The minimum adjustable volume is 50% of the maximum volume. If the DIU volume is not adjustable, the display screen shows a grayed bar graph whenever volume adjustment is selected. See Fig.. After each ignition switch cycle, the volume will default back to 100%.
Note: Headway and collision alert tones may be suppressed when the brake is applied if the system is configured to do so.
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Adjustable Volume
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Non-Adjustable Volume
Fig. 4, Volume Screen
SmartCruise Headway Range
Headway range adjustment is only available with SmartCruise. Headway range is adjustable between 3.25 and 2.25 seconds. The headway range setting will default to 3.25 seconds after each ignition power cycle.
If headway range adjustment is disabled, only the 3.25 sec screen is displayed. See Fig.. for the various headway range screens. Press the OK button to exit the menu.
Note: If the headway range is adjusted to three seconds or below and SmartCruise is active, the 3-second collision warning headway alert will not display. All other alerts are not suppressed.
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Minimum headway adjustment
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Maximum headway adjustment
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Headway range disabled
Fig. 5, Headway Range Screen
Brightness
Use the up and down arrows to change the DIU backlight and warning LED brightness. Press the OK button to exit the brightness screen.
The ambient light sensor reading determines if the DIU is in daytime or nighttime mode. Menu-adjusted brightness is applied only to the mode the DIU is in at the time of adjustment. The previous brightness settings are repeated after each ignition cycle. However, the graphic display and the warning LED brightness range are constrained such that they are always visible regardless of how low the brightness is adjusted in all driving conditions. Press the OK button to exit the menu.
Unit Adjustment Screen
The unit adjustment screen allows the driver to select either km/h or mph units for display of SmartCruise set speed. Press OK to exit the mph selection screen.
System Status
System status shows the status of each system, indicating if the system is operating normally. If a system is not operating normally, the system displays Failed beside the system name. Failed indicates that a fault is preventing the system from operating and it cannot be used until the fault is corrected or acknowledged.
Depending on the VS-400 system installed, one of the screens shown in Fig.. will appear unless a system fault is active. Press OK to exit the system status menu.
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Status display for CWS and SmartCruise configuration
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Status display for CWS configuration
Fig. 6, System Status Screens
Diagnostics
The DIU displays fault codes currently active when this screen is selected and the vehicle is stationary. See Fig.. Contact an authorized Freightliner service center if fault codes display.
