ELECTRICAL SYSTEM AND TESTING: ELECTRIC VEHICLE
Troubleshooting
2007-2008 XRT 800, 810 and 850 Maintenance and Service Manual
Page 21-19
21
Test Procedure 9A – Pins 1, 2, and 3
See General Warning on page 1-1.
Pins 1, 2, and 3 in the 16-pin connector provide a connection point from the MCOR potentiometer to the
speed controller.
1. Disconnect the battery cables as instructed.
See WARNING “To avoid unintentionally starting...” in
General Warning on page 1-1.
2. Place chocks at the front wheels and lift the rear of the vehicle with a chain hoist or floor jack. Position
jack stands under the frame crossmember between the spring mount and side stringer, just forward of
each rear wheel.
See WARNING “Lift only one end...” in General Warning on page 1-1.
3. Disconnect the 16-pin connector at the speed controller.
4. Set a multimeter to 20k ohms. Insert the red (+) probe of the multimeter into pin 2 (yellow wire) of the 16-
pin connector.
See following CAUTION.
Insert the black (–) probe into pin 3 (purple/white wire) of the
16-pin connector
(Figure 21-5, Page 21-19)
.
CAUTION
• Do not fully insert probes into the 16-pin plug. Doing so can result in a poor connection.
5. With the accelerator pedal fully up (not pressed), the multimeter should read approximately 1k ohms.
6. Slowly press the accelerator pedal while monitoring the multimeter. The resistance should rise as the
pedal is pressed. When the pedal is all the way to the floor, the multimeter should indicate between 5.67k
ohms and 7.43k ohms.
7. Set a multimeter to 20k ohms. Insert the red (+) probe of the multimeter into pin 2 (yellow wire) at the 16-
pin connector. Connect the black (–) probe into pin 1 (white wire).
See previous CAUTION.
8. With the accelerator pedal fully up (not pressed), the multimeter should indicate between 5.67k ohms
and 7.43k ohms.
9. Slowly press the accelerator pedal while monitoring the multimeter. The resistance should drop as the
pedal is pressed. When the pedal is all the way to the floor, the multimeter should indicate approximately
1k ohms.
10. If any other reading is observed, check the continuity of the wires in the wire harness.
Figure 21-5 Pins 1, 2, and 3 Test
2m
20
m
200
m
2k
200
200
200
200
20
2
200
m
500
20k
200k
2000
k
1000
OFF
WAVETEK
5XL
V
V
V
A
!
!
COM
200nA
MAX
1000 ---
750V
FUSED
SPEED CONTROLLER
20k ohm SETTING
(READING WITH
PEDAL UNDEPRESSED)
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