MAN 650314C
13
CHECK ENG (-)
The check engine terminal is used with fuel injection ECM’s to display engine problems
and trouble codes. The CHECK input is activated by a ground signal from the ECM. Whenever
the check input is grounded, the system will display “
check ENGINE
” on the LCD1 message
display. This message can be cleared by pressing and holding SW1. There is also a red check
engine indicator that will illuminate on the display face.
For certain ECM’s, when placed into diagnostic mode, trouble codes can be read by
counting the flashes of the check engine indicator. Consult a service manual for the fuel injection
system that you have for further information on trouble codes or if that is how your system
operates. With some ECM’s, a 12 volt light bulb may need to be connected in addition to the
CHECK input in order to provide proper current loading. In this case, both the bulb and our
display system indicator would come on when the check engine wire is “active”.
DIM
The backlights and needles in the VHX systems are designed to illuminate when the
headlights are turned on. Connect the DIM terminal to the taillight or parking light circuit so it has
12 volts whenever the headlights are on. When power is applied to the DIM terminal, the
instruments will illuminate at a preset brightness level. When the DIM terminal does not have
power, the backlighting will be off, unless they’re enabled in setup to be on in day time operation.
The night brightness level is adjustable two different ways. This preset brightness is
adjusted in the setup menu “
LIGHTING
”. See ADJ SND for a description of the second method.
AUX. I/O
This jack is used to connect future bus expansion modules (BIM). Do not attempt to plug
in any other device to this jack or damage to the control box will occur. This connector should be
left open, unless using a Dakota Digital product designed for it. Operation is discussed with BIM
units purchased separately from Dakota Digital.
DISPLAY CABLE CONNECTION
This is where the network/CAT 5 cable from the display system plugs into the control box.
All three connectors are exactly the same output so it does not matter which one you choose to
use. Some systems may have two cables leading down from the system and you will need to
connect both cables, and it doesn’t matter which one. Unused jacks can be left open.
Some systems may also need a cable connecting the two halves or multiple gauges in the
system together. If the back of the displays have more than one connector you will need to
jumper it to the other display that has only one. The shorter cable supplied in the kit is for this
connection.
***If you are purchasing a longer network cable to connect the display system to the
control box please make sure to get a CAT 5, CAT5E, or CAT6 “patch cable” and NOT a
“cross over” cable.
Summary of Contents for VHX systems
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