DVM-250/DVM-250Plus Installation Guide
860-00129-00 Rev C
Copyright © 2010-2015 Digital Ally, Inc.
5-12
Basic Troubleshooting
Symptom
Resolution
System will not power up.
Verify the power cable connector is connected to the back of the DVM.
Check the power cable fuses located in the in-line fuse housing on the
power cable.
Verify there are no breaks, pinches, or cuts in the wiring or cable harness.
Check the wiring and voltage levels to the vehicle power and ignition
switch wiring.
All LEDs are flashing rapidly in
unison
DVM is configured to use an external SD card and the SD card is missing.
The external SD card does not have enough free available storage for
uploading the events from internal memory. Replace the external SD card
with a blank SD card.
Yellow LED on Solid
Memory is full. Upload event files from the DVM or replace the external
memory storage device.
DVM powers up but doesn’t
record
Check the LED status indicators and clear accordingly
Reset the system.
DVM powers up and goes directly
to an event record (Red LED
Flashes)
An event record has been triggered from either an internal sensor or from
an IF Box:
Disconnect the Sensor Cable RJ45 connector from the IF Box and reset the
DVM. If the problem doesn’t re-occur, check the wiring from the vehicle
to the sensor cable.
Check the DVM configuration parameter values for all internal sensors
and/or IF Box sensors.
Backup Camera not visible on the
LCD when the vehicle is in
Reverse gear
Verify the DVM is powered ON and operational.
Note
: Backup camera operation will only occur when
vehicle ignition is on and running.
Verify the reverse gear wiring is connected to the Red wire of the RJ45
sensor cable.
Verify the Reverse Gear signal voltages.
Verify there are no breaks, pinches, or cuts in any of the wiring or cable
harnesses for the backup camera, IF Box, reverse gear wiring, vehicle
power and ignition wiring.
Verify the IF Box is connected to the DVM.
Verify the camera cable connector is connected to the back of the DVM.
Verify the camera cable from the DVM is connected to the connector on
the hard-wired harness from the camera.
Verify the DVM sensor inputs are configured correctly through the
Configuration Manager
software. Refer to the Administrator Guide for
additional details for configuring the DVM.
Backup Camera is visible when
the vehicle is in Park
The default operation for the IF Box reverse gear signal is from High to
Low (+12vdc to 0vdc). If the reverse gear signal that is connected has
+12VDC when in reverse, the DVM will need to be re-configured. Refer to
the Administrator Guide for additional details for configuring the DVM.
Backup Camera video is garbled
or not intelligible
Verify backup camera, cabling, and connectors.
IF Box may be defective
DVM is unresponsive
Verify the cables and cable connections.
Verify vehicle power.
Press the reset button.
False Triggering of Event
Recordings
Determine which trigger is causing the false trigger by viewing the event
recording.
The unit can be reconfigured to default settings and enable each trigger
to determine which one is causing the false trigger.
If the Accelerometer is causing false triggering, verify the mirror is in the
normal rearview mirror orientation.
