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ELECTRICAL SYSTEM AND TESTING
Troubleshooting
2008-2011 IQ Plus Electric Vehicle Maintenance and Service Supplement
Page 11-25
11
5.4. If the voltage reading is zero volts when the accelerator pedal is pressed, check the key switch cir-
cuit using the following test procedures.
5.4.1. Set a multimeter to 200 volts DC. Place black (–) probe on battery no. 8 negative post and
the place red (+) probe (with insulation-piercing probe) on the blue wire where it connects
to the MCOR. With the key switch ON, the reading should be approximately 48 volts (full
battery voltage).
5.4.2. If the reading is zero volts, check the continuity of the blue wire that goes from the key
switch to the MCOR.
5.4.3. If the reading is approximately 48 volts, proceed to the following step.
5.4.4. Set a multimeter 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 where it
connects to the MCOR. With the Tow/Run switch in the RUN position, the key switch ON,
the Forward/Reverse rocker switch in NEUTRAL and the accelerator pedal pressed, the
reading should be approximately 48 volts (full battery voltage).
5.4.5. If the reading is zero volts, test the continuity of the MCOR limit switch. If the limit switch
does not pass the continuity test, replace the MCOR.
TEST PROCEDURE 10 – 24-PIN CONNECTOR
See General Warning, Section 10, Page 10-1.
1. Disconnect the batteries and discharge the controller.
See Disconnecting The Batteries on page 10-3.
2. Disconnect the 24-pin connector from the speed controller. Inspect terminal ends inside plug to ensure
they are in position and seated in plug housing. If any terminals look like they are not pushed all the way
into the connector, gently push the terminals until they are firmly seated in the 24-pin connector. After
each terminal has been pushed into the housing, gently pull on the wire to ensure it is locked into place.
3. Check wires in the plug to make sure none are broken at the terminal pin crimp. Repair or replace as
required.
4. Check the wire colors of each wire and make sure that the colors for each pin position match the wire
colors in the wiring diagram.
See Wiring Diagrams beginning on page 11-2.
5. When connecting the 24-pin connector to the controller, push plug into controller receptacle with enough
force to lock plug into place. An audible click will be heard when plug is properly seated to the controller.
A procedure is provided for testing each of the wires in the 24-pin connector. Refer to the following chart for
the appropriate procedure for each pin in the 24-pin connector.
If the results of any of the referenced procedures are different from those described in the procedure, check
the continuity of the wires in the wire harness and test the connected components with the appropriate test
procedures.