Columbia ParCar Expediter EX21-24A, Service Manual, Page: 26 / 94

Section 4 - Troubleshooting
TROUBLESHOOTING WITH PCPAK (continued)
3. Check the FS1 Switch input on the same screen. With the
accelerator at rest, the value for the FS1 Switch should read
“open”. When the accelerator pedal is pressed, the value
should change to “closed” (Figure 4-5). If the value fails to
close, check the FS1 wiring circuit and test the switch with
a VOM. Check the wiring back to the controller (Pin 4).
4. Check the direction input to the controller. Observe the
value of the “Forward Switch” item while turning the
direction selection knob to “Forward” and to “Neutral”.
The switch should read “open” when the knob is in neutral
and “closed” when in forward (Figure 4-5). Do the same in
reverse by monitoring the “Reverse Switch” item and value.
If the switch fails to close in either direction, check the switch
with a VOM and the wiring back to the controller (Pin 2 for
Forward and Pin 3 for Reverse).
5.
Check the “Seat Switch” item and value (Figure 4-6). For
vehicles equipped with a seat switch, the value should read
“open” when the operator seat is not occupied, and
“closed”
when the operator seat is occupied. If the switch fails to
close, check the wiring from the B- post of the controller to
the seat switch, test the seat switch with a VOM, and check
the wiring back to the controller (pin 5).
For vehicles without a seat switch, the value should read
“Closed”. If the switch does not register as closed, check
the black 5 wiring from the B- post of the controller to
controller plug (pin 5).
If the vehicle is receiving the correct inputs and fails to operate,
contact Columbia Tech Support for further assistance.
Figure 4 - 5
Figure 4 - 6