Service Manual

The DDU controls system power, range for vehicle
warnings, speaker volume, and all other system func-
tions. At the lower front edge of the DDU, a slot is
provided to insert the optional driver’s identification
card. Alert and indicator lights advise of multiple
warning levels, system power, system failure, and, if
so configured, failure of the driver to insert the identi-
fication card.
A light sensor automatically adjusts alert and indica-
tor light brightness depending on cab lighting condi-
tions. A small speaker provides audible alert tones to
warn of closing on an object ahead and, when
equipped with an optional side sensor, of objects
alongside when the turn signal is activated in prepa-
ration for a lane change. Additional tones indicate
speaker volume, system failure, driver’s card status,
and data extraction pass or fail.
1.
The green power-on/driver’s card (optional) sta-
tus indicator light illuminates when the system is
activated and the power-on LED test is complete.
If the system is configured to require that the
driver’s card be read, and it is not, the ON light
blinks continuously.
2.
Push in the volume control and power ON/OFF
knob to turn power on or off. Turn the knob left
or right to increase or decrease speaker volume.
Press and hold the knob for 5 seconds and then
release it to activate the failure display mode.
NOTE: The system may be configured to have
no on/off capability and the volume may be con-
figured to allow only some volume control.
3.
The speaker is located under the top cover of
the DDU. It sounds audible tones to alert the
driver to potential hazards. Volume may be re-
stricted to a range above a minimum level.
NOTE: This is a configurable electronic param-
eter.
4.
Rotate the range knob (if enabled) to change the
first alert detection range from 3 to 2 seconds.
This will also change the second alert detection
range from 2 to 1.75 seconds. Push and hold the
knob for 5 seconds to activate the accident re-
construction function and freeze the most recent
data in half of the allocated memory.
VOLUME ALERTS RANGE
EATON VORAD
TECHNOLOGIES
10/15/98
f610258
ON SC
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FAIL
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1. Red System Failure Indicator Light
2. Green Power ON/Driver’s Card Status Indicator Light
3. Volume Control and Power ON/OFF Knob
4. Speaker
5. Range Knob
6. Green SC Indicator Light
7. Photo Light Sensor
8. Driver’s Identification Card Slot
9. Red Alert Light
10. Orange Alert Light
11. Yellow Alert Light
12. Distance/Danger Alert Lights
Fig. 2.24, Driver Display Unit, EVT-300
Instruments and Controls Identification
2.21