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12
Test Procedures
TEST PROCEDURE 7 – Key Switch and MCOR Limit Switch Circuit
See General Warnings on page 1-1.
NOTE: This is a voltage test.
The MCOR provides FOOT INPUT to the controller.
The key switch provides KEY INPUT to the controller.
Key Switch and MCOR Limit Switch Circuit Test with the CDT Handset
1.
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 Warnings on page 1-1.
2.
Turn the key switch to the OFF position and place the Forward/Reverse switch in the NEUTRAL position.
3.
Connect the CDT to the vehicle. See Plugging the CDT into the Vehicle on page 11-2.
4.
Test the key switch.
4.1.
Access the Monitor menu, and select KEY INPUT by using the SCROLL DISPLAY buttons. The CDT
should indicate OFF when the key switch is in the OFF position.
4.2.
While monitoring the CDT display screen, turn the key switch to the ON position. The CDT should indicate
ON.
4.3.
If the CDT does not indicate that KEY INPUT is ON when the key switch is in the ON position, proceed to
the following procedure, Key Switch and MCOR Limit Switch Circuit Test without the CDT Handset. If the
key switch functions as described, proceed to the following step. See following NOTE.
NOTE: The key switch MUST function properly in order to test the MCOR limit switch with the CDT handset.
5.
Test the MCOR limit switch.
5.1.
Select FOOT INPUT on the Monitor menu by using the SCROLL DISPLAY buttons on the CDT.
5.2.
The CDT should indicate that FOOT INPUT is OFF when the accelerator pedal is not pressed, regardless of
the key switch position.
5.3.
With the key switch in the ON position, press the accelerator pedal. The CDT should indicate that FOOT
INPUT is ON when the accelerator pedal is pressed.
6.
If any reading is obtained that is not described in steps 4 and 5, perform the following steps:
6.1.
Check the pedal group for proper adjustment. See Accelerator and Brake Pedal Group Section.
6.2.
Check the wiring of the key switch and MCOR.
6.3.
Check the continuity of the key switch wires and the MCOR limit switch wires.
7.
If the problem was not found, proceed to the following procedure.
Key Switch and MCOR Limit Switch Circuit Test without the CDT Handset
1.
If necessary, see Testing Basics on page 12-11.
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 rails just forward of each spring mount. See WARNING "Lift only one end..." in
General Warnings.
3.
Place the Run/Tow switch in the RUN position and the Forward/Reverse switch in the NEUTRAL position.
4.
Pin 1 Tan Wire: Lift bed, remove access cover, access the controller. See following NOTE.
NOTE: The easiest way to test the key switch and MCOR Limit Switch is to check the pin 1 tan wire in the 24-pin
connector. Pin 1 is the end of this circuit.
Page 12-20
2019 Carryall 500 and 700 Maintenance and Service Manual
ELECTRICAL SYSTEM TROUBLESHOOTING:
IQ PLUS ELECTRIC VEHICLES
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Table of Contents
Troubleshooting
