ELECTRICAL SYSTEM AND TESTING
Troubleshooting
Page 11-38
2008-2011 IQ Plus Electric Vehicle Maintenance and Service Supplement
11
TEST PROCEDURE 14 – MOTOR SPEED SENSOR
See General Warning, Section 10, Page 10-1.
Motor Speed Sensor Test with the IQDM Handset
ý CAUT ION
• Perform the following procedure only on a level surface. To avoid injury or property damage,
ensure that the path of the vehicle is clear before pushing vehicle.
1. Turn the key switch to the OFF position and place the Forward/Reverse switch in the NEUTRAL position.
2. Connect the IQDM to the vehicle.
3. Access the Monitor menu and select SPEED PULSES by using the SCROLL DISPLAY buttons. The
IQDM should indicate OFF when the vehicle is at rest.
4. While monitoring the IQDM display screen, slowly push the vehicle a short distance (about 3 feet (1
meter)). The IQDM should indicate ON for speed sensor pulses while the wheels are in motion.
5. If the IQDM does not indicate ON while the wheels are in motion, proceed to the following procedure,
Motor Speed Sensor Test without the IQDM Handset.
Motor Speed Sensor Test without the IQDM Handset
1. Turn the key switch to the OFF position and place the Forward/Reverse switch in the NEUTRAL position.
2. With batteries connected, disconnect the three-pin connector at the motor speed sensor.
3. Check voltage at black/white wire:
3.1. Set a multimeter to 200 volts DC. Place the red (+) probe on the battery no. 1 positive post and
place the black (–) probe on the black/white wire terminal socket in the three-pin connector. The
voltage reading should be 48 to 50 volts (full battery voltage).
3.2. If the reading is zero volts, check the continuity of the black/white wire from the 24-pin connector
at the speed controller to the three-pin connector at the motor speed sensor. If the continuity is cor-
rect, replace the speed controller.
Figure 11-27 Test 12: Charger Receptacle Red Wire
1
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