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ELECTRICAL SYSTEM AND TESTING
Troubleshooting
Page 11-18
2008-2011 IQ Plus Electric Vehicle Maintenance and Service Supplement
11
TEST PROCEDURE 4 – MCOR VOLTAGE
See General Warning, Section 10, Page 10-1.
The accelerator position, which is proportional to the MCOR voltage, can be displayed with the IQDM hand-
set. If an IQDM handset is not available, proceed to MCOR Voltage Test without the IQDM Handset on
page 11-18.
MCOR Voltage Test with the IQDM 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 Warning, Section 10, Page 10-1.
See following NOTE.
NOTE:
The key switch should be placed in the OFF position and left in the OFF position for the duration of
this test.
2. Connect the IQDM to the vehicle.
3. Access the Monitor menu and select THROTTLE % by using the SCROLL DISPLAY buttons.
4. The IQDM should indicate 0 % with the pedal not pressed. While monitoring the IQDM display screen,
slowly press the accelerator pedal. As the pedal is pressed, the IQDM should indicate a rise from 0 %
(pedal not pressed) to 100 % (pedal fully pressed).
5. If the MCOR does not operate as described in step 4, proceed to
MCOR Voltage Test without the IQDM
MCOR Voltage Test without the IQDM 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 Warning, Section 10, Page 10-1.
See following NOTE.
NOTE:
2. With the batteries connected, place Tow/Run switch in RUN. Using a multimeter set to 200 volts DC,
place red (+) probe on battery no. 1 positive post and place black (–) probe (with insulation-piercing
probe) on the purple/white wire (1) at a point close to the three-pin connector at the MCOR
. The reading should be approximately 48-50 volts (full battery voltage).
Figure 11-11 Test MCOR: Purple/White Wire (+)