Motor Speed Sensor - Tomberlin E-MERGE 2007 Maintenance Manual

Check Procedure 9—Motor speed sensor
Please refer to Chapter 1 "Protection for Electrical Safe ty".
Δ Note
•
The fo llowing operations must be conducted on a flat surface. To prevent injury or pro perty loss, make
sure that the passage of the elec tric vehicle is unblo cke d before moving it.
1. Turn the key switch to OFF and turn Forward/Reverse gear switch to NEUTRAL.
2 Use a multimeter set to 200V DC, connect the red (+) probe to the positive binding post of the battery and
connect the black (-) probe to the Terminal 16 of the 3-wire connector. The voltage reading should be
approximately 0V (the battery is fully charged).
3． Turn Tow/Run switch to RUN, use a multimeter set to 20V DC, connect the black (-) probe to the negative
binding post of the battery pack and connect the red (+) probe to Wire 15 of the 3-wire connector. The voltage
reading should be approximately 12V.
4 If the reading is 0V, check the continuity of Wire 15 o f 3-wire connector which connects the controller and the
motor speed sensor. If the continuity is ok, replace the controller.
5 If the voltage reading is correct, continue with the following operations:
5.1 Use a multimeter set to 20V DC, connect the black (-) probe to the negative binding post of the battery pack and
connect the red (+) probe to the terminal of Wire 14 of the 3-wire connector on the motor speed sensor. The
voltage reading should be approximately 4.60-5.00V.
5.2 If the reading is 0V, check the continuity of Wire 14 o f 3-wire connector which connects the controller and the
motor speed sensor. If the continuity is ok, replace the controller.
5.3 If the reading is lower than 3.50V, check the wire and plug for continuity and replace the controller if necessary.
6. Reconnect the 3-wire connector on the motor speed sensor. Use a multimeter set to 20V DC, connect the black
(-) probe to the negative binding post of the battery pack and connect the red (+) probe to Wire 14 which is
between the 3-wire connector on the motor speed sensor.
6.1 Jack up a rear wheel so that it is off the ground. Turn the rear wheel slowly drive the armature of the motor.
When the armature is rotating, the voltage reading should change from 0V to approximately 4.85V. In each
round the motor armature rotates, the voltage reading will change from 0V to 4 .85V and 0V for 4 times.
Note : 4.85V is a approximate reading of voltage. The actual reading may range between 4.50V and 5.00V.
6.2 The speed sensor should be replaced in the following cases:
•
No voltage reading is displayed;
•
The voltage reading is no greater than 3.50V;
•
No voltage reading change when the motor is running.
Check Procedure 10—forward/reverse gear switch
Please refer to Chapter 1 "Protection for Electrical Safe ty".
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