ELECTRICAL SYSTEM AND TESTING
Troubleshooting
2008-2011 IQ System Electric Vehicle Maintenance and Service Supplement
Page 11-23
11
TEST PROCEDURE 8 – KEY SWITCH AND MCOR LIMIT SWITCH CIRCUIT
See General Warning, Section 10, Page 10-1.
Key Switch and MCOR Limit Switch Circuit 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 10-2.
2. Turn the key switch to the OFF position and place the Forward/Reverse switch in the NEUTRAL position.
3. Connect the IQDM to the vehicle.
4. Test the key switch.
4.1. Access the Test menu, and select KEY INPUT by using the SCROLL DISPLAY buttons. The IQDM
should indicate OFF when the key switch is in the OFF position.
4.2. While monitoring the IQDM display screen, turn the key switch to the ON position. The IQDM
should indicate ON.
4.3. If the IQDM does not indicate that KEY INPUT is ON when the key switch is in the ON position, pro-
ceed to the following procedure, Key Switch and MCOR Limit Switch Circuit Test without the IQDM
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 IQDM hand-
set.
5. Test the MCOR limit switch.
5.1. Select FOOT INPUT on the Test 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 3 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 beginning 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 11-23.
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 10-2.
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.
