ELECTRICAL SYSTEM AND TESTING
Troubleshooting
2008-2011 IQ System Electric Vehicle Maintenance and Service Supplement
Page 11-37
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6. Reconnect the three-pin connector at the motor speed sensor. Using a multimeter set to 20 volts DC,
place the black (–) probe on the battery no. 6 negative post and place the red (+) probe (with insulation-
piercing probe) on the green wire between the three-pin connector and the motor speed sensor.
6.1. Raise one rear wheel off ground. Slowly turn the rear wheel to rotate the motor armature. As the
armature rotates, the voltage reading should alternate from zero to approximately 4.85 volts. The
voltage reading will fluctuate from zero to 4.85 volts and back to zero four times for each revolution
of the motor armature.
See following NOTE.
NOTE:
The voltage reading of 4.85 is an approximate reading. The actual reading may vary from 4.50 to
5.00 volts.
6.2. Replace the speed sensor if
•
there is no voltage reading.
•
the voltage reading is not above 3.50.
•
the voltage reading does not fluctuate as the motor is turned.
TEST PROCEDURE 14 – SOLENOID CONTINUITY
See General Warning, Section 10, Page 10-1.
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. Disconnect the batteries and discharge the controller.
See Disconnecting The Batteries on page 10-3.
3. Disconnect the yellow wire from the large post of the solenoid.
4. Disconnect the resistor terminal from the same large post as the removed wire.
5. Set a multimeter to 200k ohms. Place the black (–) probe on the solenoid large post with the 6-gauge yel-
low wire and place the red (+) probe on the large post with the 6-gauge red wire. The reading should be
no continuity.
6. Connect the 6-gauge yellow wire and resistor to the large solenoid post. Install washer and nut on large
solenoid post and tighten to 77 in-lb (8.7 N·m).
7. Place the Tow/Run switch in the TOW position and connect the battery cables, positive (+) cable first.
Tighten battery terminals to 110 in-lb (12.4 N·m).
8. Place the Tow/Run switch in the RUN position, turn the key switch to the ON position, place the Forward/
Reverse rocker switch in the FORWARD position, and press the accelerator pedal. The solenoid should
click and the multimeter should indicate continuity. If the reading is no continuity, replace the solenoid.