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Testing the Shift Routine
First test the Shift terminal for output. The easiest
way to test the shift output, is to toggle the Shift Mode
(explained on the previous page) between the HI and LO
settings. Each time the Shift Output Mode changes states the
shifter should also move. If the shifter does not move,
disconnect all wires connected to the Shift terminal. Then
using a Digital Volt Meter or a test light, check the Shift
terminal for power. It should have 12 Volts when the Shift
Output Mode is set to LO and zero Volts when the Shift
Output Mode is set to HI. If the Mega 475 passes the first
test, move onto the second test. If the output does not
change, check to see if the fuse for the shift output is good.
If the fuse is good, contact Digital Delay.
The second test is a time shift; this checks the input
side or the push-button side of the Mega 475. Set the Mega
475 to a one second shift on time. After entering the shift,
press and release the button connected to the P.B. 1 terminal.
One second after the Transbrake releases, the shifter should
move from low gear to second gear. If the Mega 475 passes
the second test continue on to the final test. If the shifter
does not move, check to see if when the button connected to
the P.B. 1 terminal is pressed and held that the text
“Transbrake On” comes up on the screen. If the text
“Transbrake On” does not come on check the button for
proper operation and wiring from the button to the P.B. 1
terminal. If you can’t find a problem with the button or the
wiring, disconnect the button from the P.B. 1 terminal. Next
test the P.B. 1 input, by using a short piece of wire to jump
from the ground terminal to the P.B. 1 terminal. When the
wire is connected between the two points the wire will act as
a temporary button and the text “Transbrake On” should
come on. If not, contact Digital Delay.
The Final test is an RPM shift, this checks the Tach
input. Set the Mega 475 to shift at 3000 RPM. Then while
looking at the Tach on the Mega 475 start the engine, once
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