Traction Speed Sensor
The traction speed sensor is attached to the upper
transaxle cover (Fig. 17). It uses a magnetically based,
Hall Effect integrated circuit. As the differential in the
transaxle turns, the sensor accurately senses the move-
ment of the differential ring gear teeth passing by the
sensor. The red striped connector wire is the positive
lead, the black wire is the ground lead, and the gray
striped wire is the signal output.
1
3
Testing
2
1.
Locate traction speed sensor on the transaxle as-
sembly. Disconnect the wire harness connector from the
traction speed sensor.
2.
speed sensor to transaxle. Remove speed sensor from
transaxle.
Remove cap screw and lock washer that secure
Figure 17
1.
2.
Transaxle
3.
Sensor connector
Traction speed sensor
3.
Connect positive multimeter test lead to the sensor
connector gray striped wire terminal and the negative
multimeter lead to the connector black wire terminal
(Fig. 18). Set multimeter to ohms setting.
IMPORTANT: Incorrect jumper wire connections
during testing can damage the sensor.
4.
connector red striped wire terminal and ground the con-
nector black wire terminal (Fig. 18).
Using jumper wires, apply +12 VDC to the sensor
–
+
12
VDC
5.
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.
6
C B A
4
5
3
6.
After testing is complete, remove jumper wires and
multimeter leads from sensor connector. Reinstall
speed sensor into transaxle and secure with cap screw
and lock washer. Reconnect speed sensor to wire har-
ness.
1
2
Figure 18
1.
2.
3.
Speed sensor
Sensor tip
Sensor connector
4.
5.
6.
Red striped wire
Gray striped wire
Black wire
Electrical System
Multi Pro 1200/1250
Page 5 – 12
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
|---|---|
| Tags | Toro Multi Pro 1200, Toro Multi Pro 1250 |
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| Document Type | Service Manual |
| Language | English |
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