Traction Neutral Sensor - Toro Groundsmaster 360 Service Manual

Traction Neutral Sensor

The traction neutral sensor is a normally open proximity
sensor that closes when the traction pedal is in the neu-
tral position. The sensor mounts to a bracket on the trac-
tion control shaft (Fig. 47). The sensing plate for the
traction neutral sensor is the socket head bolt on the
neutral arm.
On 2WD machines, the Standard Control Module
(SCM) monitors the operation of the neutral sensor. If
the ignition switch is in the RUN position and the traction
pedal is in the neutral position, the SCM neutral sensor
input LED should be illuminated.
On 4WD machines, the Toro Electronic Controller (TEC)
monitors the operation of the neutral sensor.
Testing
1. Park machine on a level surface, lower cutting deck,
engage parking brake and stop engine.
2. Before disconnecting the neutral sensor for testing,
the sensor and its circuit wiring should be tested as an
electrical input using the SCM on 2WD machines or the
Diagnostic Display on 4WD machines (see Standard
Control Module or Diagnostic Display in the Trouble-
shooting section of this chapter). If input testing verifies
that the neutral sensor and circuit wiring are functioning
correctly, no further neutral sensor testing is necessary.
If, however, input testing determines that the neutral
sensor and circuit wiring are not functioning correctly,
proceed with the following neutral sensor testing proce-
dure.
3. Raise and support operator seat. Locate neutral sen-
sor (Fig. 47).
4. Turn ignition switch to the RUN position (do not start
engine) and check LED on cable end of neutral sensor
(Fig. 48). LED should be illuminated when the traction
pedal is in the neutral position.
5. With the ignition switch still in the RUN position (do
not start engine), press traction pedal out of the neutral
position and check LED on cable end of neutral sensor.
LED should not be illuminated when the traction pedal
is not in the neutral position.
6. If the neutral sensor LED did not function correctly:
A. Make sure that neutral sensor is properly ad-
justed (see Traction Neutral Sensor in the Adjust-
ments section of this chapter). If necessary, adjust
sensor and return to step 4 above.
B. Make sure ignition switch is OFF and disconnect
the traction neutral sensor connector from the ma-
chine wire harness.
Electrical System
C. Verify that the machine wire harness connector
terminal for black wire is closed (continuity) to
ground.
D. Turn ignition switch to the RUN position (do not
start engine) and verify with a multimeter that ma-
chine wire harness connector terminal for pink wire
has system voltage (12 VDC) present.
E. If black wire is closed to ground, pink wire has
system voltage present and sensor LED did not func-
tion, replace traction neutral sensor. Adjust sensor
after installation (see Traction Neutral Sensor in the
Adjustments section of this chapter).
7. After testing is complete, make sure that sensor con-
nector is plugged into machine wire harness.
1
1. Traction pedal
2. Neutral sensor
3. Neutral arm
1. Neutral sensor
2. Socket head screw
Page 5 - - 36
3
4
5
2
Figure 47
4. Socket head screw
5. ASC lever
3
1
4
Figure 48
3. Neutral arm
4. Sensor cable
Groundsmaster 360
2