ELECTRICAL SYSTEM AND TESTING
Troubleshooting
2008-2011 IQ Plus Electric Vehicle Maintenance and Service Supplement
Page 11-35
11
Test Procedure 10G – Pin 17
See General Warning, Section 10, Page 10-1.
Pin 17 in the 24-pin connector provides a connection point for the solenoid coil to the speed controller. The
speed controller activates the solenoid coil by providing a ground to the solenoid coil at the appropriate time.
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.
2. Set a multimeter to 200 volts DC. Use an alligator clip to connect the red (+) probe to the positive terminal
on battery no. 1. With an insulation-piercing probe, connect the black (–) probe to the blue/white wire
attached to pin 17 of the 24-pin connector.
3. Place the Tow/Run switch in the RUN position, the Forward/Reverse swith in the FORWARD position,
and the key switch in the ON position.
4. With the accelerator pedal pressed, the multimeter should read 48 volts DC. With the pedal up, the mul-
timeter should read 0 volts DC.
5. If the voltage reading is less than 40 with the accelerator pedal pressed, replace the controller.
6. If any other activity is observed, check the following items:
•
Continuity of the wires in the wire harness.
•
Reverse buzzer for proper operation.
See Test Procedure 17 – Reverse Buzzer on page 11-42.
•
Tow/Run switch for proper operation.
See Test Procedure 6 – Tow/Run Switch on page 11-21.
•
Key switch for proper operation.
See Test Procedure 9 – Key Switch and MCOR Limit Switch Cir-
•
Solenoid for proper operation.
See Test Procedure 15 – Solenoid Contacts on page 11-41.
Test Procedure 10H – Pin 3
Voltage is supplied to Pin 3 through the walk away braking circuit breaker:
1. Disconnect the 24-pin connector at the speed controller.
2. With a multimeter set for 200 volts DC, insert the red (+) probe of the multimeter into pin 3 (orange wire)
of the 24-pin connector.
See following CAUTION.
With an alligator clip, connect the black (–) probe to
the negative terminal of battery # 8.
CAUTION
• Do not fully insert probes into the 24-pin plug. Doing so can result in a poor connection.
3. The reading should be 48 volts. If the reading is zero volts, replace the circuit breaker.
Test Procedure 10I – Pin 20 (Smart-Key Switch Only)
Voltage is supplied to Pin 20 when it is in the Mode position.
1. With a multimeter set for 200 volts DC, insert the red (+) probe of the multimeter into pin 20 (purple wire)
of the 24-pin connector.
See following CAUTION.
With an alligator clip, connect the black (–) probe to
the negative terminal of battery # 8.
2. The reading should be 48 volts. If the reading is zero volts, check the purple wire continuity from the key
switch to the 24 pin connector. If there is no continuity, replace the keyswitch.
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