MAN 650314:D
23
Now, with the float in the empty position, press and release SW1.
The message display will show “
custom 33%
” and “
xxx OHMS
”. Move the float to 1/3 full
and then press and release SW1.
The message display will show “
custom 66%
” and “
xxx OHMS
”. Move the float to 2/3 full
and then press and release SW1.
The message display will show “
custom 99%
” and “
xxx OHMS
”. Move the float to the full
position and then press and release SW1. The new sender is now stored under the
“
CUSTOM
CUSTOM
CUSTOM
CUSTOM
” sender selection.
The message display will be back in the fuel sub-menu showing “
FUEL test
”.
***If the resistances recorded during custom calibration are not in sequence you will get a
“
FAIL
FAIL
FAIL
FAIL
” message at the end of calibration. No values will be saved and calibration must be
started again. Make sure the resistance of the sensor is linear from empty to full.
Note: Once the custom sender is programmed, go back and ensure that “
custom
custom
custom
custom
” is
selected in the “
FUEL
FUEL
FUEL
FUEL SENDER
SENDER
SENDER
SENDER
””””
menu. Programming the custom sender curve does not
automatically make it the ‘active’ sender.
Fuel sensor test (
TEST
)
This menu will allow you to check the resistance the control box is reading from the fuel
level sensor. This can be used as a diagnostic tool if you are having trouble or feel that the
reading is incorrect. You can use the table of fuel sensors above to get an idea on the resistance
you should be seeing.
When “
FUEL test
” is displayed, press and hold SW1 until the message screen changes.
Release SW1 and the current resistance from the fuel level sensor will be displayed as
“
test fuel
” “
xxx ohms
” where xxx is the resistance seen at the control box.
Press and release SW1 to scroll to other sensor inputs if you wish “
temp
” “
oil
”
“
Fuel
”.
Once complete, hold SW1 until “
DONE
” is displayed.
Release the switch to go onto the next sub-menu item.
Note: Fuel level sensors are generally not precise; in the test function you should expect to see
some error. For instance a GM 0-90 sensor may display 5 ohms empty and 97 ohms full. If you are
within 10% of the values in the table, this is considered within specification.
Exit fuel setup (
done
)
This will allow you to exit the fuel setup and go on to the next setup menu.
When “
fuel done
” is displayed, press and hold SW1 until “
DONE
” is displayed
Release the switch to go on to the next menu.
LIGHTING SETUP
The lighting menu, “
LIGHTING
”, allows you to set the backlight brightness level for the
LCD message centers under daytime viewing conditions. You can also adjust the level the
backlights will turn on to when the DIM terminal has power applied to it for night time viewing.
You can even enable the back lights during the day if you wish so that the tic marks and needles
are always lit.
If you are using the separately purchased DIM-1 kit from Dakota Digital, the dim brightness
level doesn’t matter; when the DIM terminal has power applied to it, you have total control of the
night brightness level with the twist of a knob. If the DIM-1 is wired to the ADJ SND and ADJ –
terminals, the dim setting will be overridden by the DIM-1 knob.
Summary of Contents for VHX-78C-MC
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