TCM FB-8 Series, Service Manual

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2. ELECTRICAL PARTS AND PROCEDURES FOR CHECKING
2.2.9 MOTOR ROTATION SENSOR
The motor rotation sensor is a magnetic induction
sensor which detects the alternating voltage generated by
the passing of the teeth in the rotor opposite the motor
shaft.
Two motor rotation sensors are installed on the drive
motor to detect the direction of rotation of the motor.
Checking procedure
①
Connect a 4.75-16 V power supply to both the
Vcc terminal and the GND terminal of the motor
rotation sensor.
②
Connect an analog multi-meter to both the Vout
terminal and the GND terminal.
③
Rotate the output shaft of the motor and make sure
the voltage at the Vout terminal should be about 1/2
of the power supply voltage.
■
How to rotate the output shaft of the motor
1. Jack up one of the front wheels and block the other
front wheel and the two rear wheels with blocks.
2. Turn the jacked-up front wheel with both hands.
This allows the output shaft of the motor to be
rotated.
2 3 1
(+) (S) (-)
Connector
Sensor section
Power
supply
4.75 - 16 V