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1.3 TEST FUNCTION
Diagnostic software is built into the system. To activate it, press
the ENTER/TEST button until all of the display digits fill with a
checkerboard pattern, and then release it. This display will flash on
and off three (3) times. Next, all digits will be filled with a second
checkerboard pattern, the inverse of the first, which will also flash
on and off three (3) times. Careful monitoring of these patterns will
verify operation of every element of the display unit.
If the test is successful, the word “GOOD” will appear in the
display window for three seconds. (If the test is not successful, the
word “BAD” and an error message identifying the error will be
displayed. In such case, the unit will cease to function and must be
considered unserviceable until corrective action is taken.) This is
followed by:
1) The K-factor setting (Pulses Per Gallon) and units of measure
the system is set to (gallons, liters, pounds or kilograms).
2) LT ( ): Loran or GPS Type (without signal, will display ‘LOF’)
3) The distance to waypoint or destination as shown on the Loran-
C or GPS receiver to check the data interface integrity. (not
available without signal)
4) Maximum usable fuel setting.
5) Software version.
6) If the system is not capable of reading the navigation receiver
data, the word “LBD” will appear in the display window.
NOTE: a) Using the test function while the engine is running will
cause the computer to lose 17 seconds of fuel count.