Greensmaster 3300/3400 Page 6 -- 37 Electrical System
Parking Brake Switch
The parking brake switch is a normally open proximity
switch that mounts to the frame bracket used to attach
theparkingbrakeleverassembly(Fig.43).Thesensing
plate for the brake switch is a tab on the parking brake
lever assembly. The Toro Electronic Controller (TEC)
monitors the operation of the parking brake switch.
When the parking brake is not applied, the tab on the
parking brake lever is positioned near the target end of
theparkingbrakeswitchsotheswitchisclosed.Thetab
on the parking brake lever is moved away from the
switch when the parking brake is applied causing the
switch to open.
Testing
1. Park machine on level surface, lower cutting units,
stop engine and remove key from ignition switch.
2. Before disconnecting the parking brake switch for
testing,the switch andits circuitwiring shouldbe tested
as a TEC electrical input using the Diagnostic Display
(see Diagnostic Display in the Troubleshooting section
of this chapter). If input testing verifies that the brake
switchandcircuitwiringarefunctioningcorrectly,nofur-
therbrakeswitchtestingisnecessary.If,however,input
testing determines that the brake switchand circuit wir-
ing are not functioning correctly, proceed with the fol-
lowing parking brake switch testing procedure.
3. Locateparkingbrakeswitch.Makesure thatparking
brake is not applied.
4. Turnignition switchto the RUNposition (do notstart
engine) and check LED on cable end of parking brake
switch.TheswitchLEDshouldbeilluminatedwhenthe
parking brake is not applied.
5. With the ignition switch still in the RUN position (do
notstartengine),applyparkingbrakeandcheckLEDon
cable end of parking brake switch. The switch LED
should not be illuminated when the parking brake is
applied.
6. If the brake switch LED did not function correctly:
A. Make sure that parking brake s witch is properly
adjusted (see Parking Brake Switch in the Adjust-
ments section of this chapter). If necessary, adjust
switch and return to step 4 above.
B. Make sure ignition switch isOFFand disconnect
the parking brake switch 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
systemvoltagepresentandswitchLEDdidnotfunc-
tion, replace parking brake switch. Adjust switch af-
ter installation (see Parking Brake Switch in the
Adjustments section of this chapter).
7. After brake switch testing is complete, make sure
that switch connector is pluggedintomachine wire har-
ness.
1. Brake lever
2. Parking brake switch
3. Switch LED location
4. Brake lever tab
Figure 43
2
1
3
4
1. Parking brake switch
2. Parking brake lever
3. Jam nut (2 used)
4. Lock washer (2 used)
Figure 44
2
1
3
4
3
4
162 to 198 in--lb
(18.4 to 22.3 N--m)
Electrical
System
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