Traction Speed Sensor - Toro Multi Pro 5700-D Service Manual

Traction Speed Sensor

The traction speed sensor is attached to the right side
rear wheel motor (Fig. 21). The sensor provides ground
speed information for two (2) options: the Pro Control
Electronics and the speedometer kit. It uses a magneti-
cally based, Hall Effect integrated circuit. As the piston
group in the wheel motor turns, the sensor accurately
senses the movement of the pistons passing the sensor.
The red connector wire (connector terminal A) is the
positive lead, the black wire (terminal C) is the ground
lead, and the white wire (terminal B) is the signal output.
Testing
1. Make sure ignition switch is off. Remove speed sen-
sor from machine (see Traction Speed Sensor Removal
in the Service and Repair Section of this Chapter).
2. Using a multimeter, connect the positive meter test
lead to the sensor connector white wire (terminal B) and
the negative meter test lead to the connector black wire
(terminal C) (Fig. 22). Set multimeter to ohms setting.
IMPORTANT: Incorrect jumper wire connections
during testing can damage the sensor.
3. Using jumper wires, apply +12 VDC to the sensor
connector red wire (terminal A) and ground the connec-
tor black wire (terminal C) (Fig. 22).
4. The sensor should have very low resistance (near
zero) when a metal object is held near the sensor tip.
The sensor should have very high resistance (infinite)
when the metal object is moved away from the sensor
tip.
5. After sensor testing is complete, remove jumper
wires and multimeter leads from sensor connector.
IMPORTANT: When replacing the sensor, see Trac-
tion Speed Sensor Installation in the Service and
Repair Section of this chapter.
6. Reinstall speed sensor into wheel motor (see Trac-
tion Speed Sensor Installation in the Service and Repair
Section of this Chapter). Reconnect speed sensor to
machine wire harness.
Electrical System
1. Speed sensor
2. O–ring
1. Speed sensor
2. Sensor tip
3. Lock nut
4. Sensor connector
Page 5 – 14
1
2
3
Figure 21
3. RH wheel motor housing
4. Motor piston group
7
5
6
3
1
2
Figure 22
5. Red wire
6. White wire
7. Black wire
Multi Pro 5700–D
4
–
+
12 VDC
4