Parking Brake Sensor - Toro Groundsmaster 360 Service Manual

Parking Brake Sensor

The parking brake sensor is a normally open proximity
sensor that mounts to the brake lever assembly (Fig.
47). The sensing plate for the brake sensor is the park-
ing brake detent.
When the parking brake is not applied (brake latch not
engaged), the parking brake detent is positioned near
the target end of the parking brake sensor so the sensor
is closed. The parking brake detent is moved away from
the sensor when the parking brake is applied (brake
latch engaged) causing the sensor to open.
On 2WD machines, the Standard Control Module
(SCM) monitors the operation of the parking brake sen-
sor. If the ignition switch is in the RUN position and the
parking brake is not applied (brake latch not engaged),
the SCM parking brake sensor input LED should be illu-
minated.
On 4WD machines, the Toro Electronic Controller (TEC)
monitors the operation of the parking brake sensor.
Testing
1. Park machine on a level surface, lower cutting deck
and stop engine.
2. Before disconnecting the parking brake 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 Stan-
dard Control Module or Diagnostic Display in the Trou-
bleshooting section of this chapter). If input testing
verifies that the brake sensor and circuit wiring are func-
tioning correctly, no further brake sensor testing is nec-
essary. If, however, input testing determines that the
brake sensor and circuit wiring are not functioning cor-
rectly, proceed with the following parking brake sensor
testing procedure.
3. Locate parking brake sensor (Fig. 50). Make sure
that parking brake is not applied.
4. Turn ignition switch to the RUN position (do not start
engine) and check LED on cable end of parking brake
sensor. LED should be illuminated when the parking
brake is not applied (brake latch not engaged).
5. With the ignition switch still in the RUN position (do
not start engine), apply parking brake (brake latch en-
gaged) and check LED on cable end of parking brake
sensor. LED should not be illuminated when the park-
ing brake is applied (brake latch engaged).
Electrical System
6. If the brake sensor LED did not function correctly:
A. Make sure that parking brake sensor is properly
adjusted (see Parking Brake 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 parking brake sensor connector from the ma-
chine wire harness.
C. Using a multimeter, 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 parking brake sensor. Adjust sensor af-
ter installation (see Parking Brake Sensor in the
Adjustments section of this chapter).
7. After brake sensor testing is complete, make sure
that sensor connector is plugged into machine wire har-
ness.
3
1. Brake lever
2. Parking brake sensor
Page 5 - - 38
4
1
2
Figure 50
3. Brake detent
4. Parking brake latch
Groundsmaster 360