ELECTRICAL SYSTEM AND TESTING
Troubleshooting
Page 11-24
2008-2011 IQ Plus Electric Vehicle Maintenance and Service Supplement
11
NOTE:
The key switch MUST function properly in order to test the MCOR limit switch with the IQDM hand-
set.
5. Test the MCOR limit switch.
5.1. Select FOOT INPUT on the Monitor menu by using the SCROLL DISPLAY buttons on the IQDM.
5.2. The IQDM 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 IQDM 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 Section 5 – Accelerator and Brake Pedal
Group in the appropriate maintenance and service manual.
6.2. Check the wiring of the key switch and MCOR.
See Wiring Diagrams on page 11-2.
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 IQDM Handset on page 11-24.
Key Switch and MCOR Limit Switch Circuit Test without the IQDM Handset
1. Disconnect the batteries and discharge the controller.
See Disconnecting The Batteries on page 10-3.
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, Section 10, Page 10-1
3. Turn the key switch to the OFF position and place the Forward/Reverse switch in the NEUTRAL position.
4. Test the key switch.
4.1. Remove the center dash panel.
See step 2 of Key Switch Removal, Section 13, Page 13-1.
4.2. Set a multimeter to 200 ohms. Place the red (+) probe on the key switch terminal with the blue wire.
Place the black (–) probe on the key switch terminal with the green wire.
4.3. With the key switch in the OFF position, the multimeter should indicate that continuity is not present.
4.4. With the key switch in the ON position, the multimeter should indicate that continuity is present.
4.5. If any other reading is obtained, replace the key switch.
See Key Switch Removal, Section 13,
4.6. If the key switch operates as described in the previous steps, install the dash panel in the reverse
order of removal and proceed to the following step.
5. Test the MCOR limit switch.
See following NOTE.
NOTE:
Make sure that the key switch is operating correctly and that the key switch and dash panel are
properly installed before proceeding.
5.1. With batteries connected and using a multimeter set to 200 volts DC, place the black (–) probe on
the battery no. 8 negative post and place the red (+) probe (with insulation-piercing probe) on the
green wire close to the two-pin connector on the MCOR.
5.2. With Tow/Run switch in the RUN position, key switch in the ON position, and Forward/Reverse
rocker switch in the NEUTRAL position, the voltage reading should be zero volts. When the accel-
erator pedal is pressed, the voltage reading should be approximately 48 volts (full battery voltage).
5.3. If the voltage reading is 48 volts when the accelerator pedal is not pressed, check the pedal group
for proper adjustment.
See Section 5 – Accelerator and Brake Pedal Group in the appropriate
maintenance and service manual.
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