Toro 10178SL Service Manual Groundsmaster 4300 D Preface Publication

Joystick Raise and Lower Switches
Two(2)microswitchesforthejoystick    arelocatedonthe
lift control that is attached to the control arm. The rear
switch on the control is used to lower (and engage) the
cutting decks and the front switch to raise  (and disen-
gage) them. These switches are used as inputs for the
TEC controller. A normally  open contact in the switch
closes when the joystick is positioned to either lower or
raise the cutting  decks. Each switch has an  electrical
connector to make sure the normally closed contact on
the switch is not used. The raise switch has yellow/blue
and black harness wires connected to it and the lower
switch has orange and black harness wires connected
to it.
8.  If joystick switch is faulty, replace switch.
Ifthejoystickswitchtestscorrectly   andacircuitprob-
lem still exists, check wire harness (see Electrical Sche-
matic  and Circuit  Drawings  in  Chapter  8 --  Foldout
Drawings).
9.
10.Connect
wire  harness electrical  connector to  the
joystick switch.
11.
Install control arm  covers to machine (see Control
Arm Assembly  in the Service  and Repairs section  of
Chapter 6 -- Chassis).
Testing
1.
Before disconnecting the joystick switches for test-
ing,theswitches  andtheircircuitwiringshouldbetested
as TEC  controller inputs  with the  Diagnostic Display
(see Diagnostic Display in the Troubleshooting section
ofthischapter).IftheDiagnostic   Displayverifies  thatthe
joystick switches and circuit wiring are functioning cor-
rectly,nofurtherswitchtestingisnecessary.If,however,
the Diagnostic Display  determines that either  joystick
switch and circuit wiring  are not functioning correctly,
proceed with test procedure.
1
FRONT
3
2
2.
tick switches (see Control Arm Disassembly in the Ser-
vice and Repairs section of Chapter 6 -- Chassis).
Remove control arm covers to gain access to joys-
Figure 29
1.
2.
Joystick
Lower switch
3.
Raise switch
3.
Make sure ignition switch is in the OFF position.
4.
Disconnect wire harness  electrical connector from
the raise or lower switch that is to be tested (Fig. 29).
Connect a multimeter (ohms setting) across the nor-
3
1
5.
mally open (NO) and  common terminals of the switch
(Fig. 30).
6.
there should be no continuity (open) across the switch
terminals.
With  the joystick  in  the neutral  (center)  position,
2
4
7.
Move and hold the joystick to activate the switch be-
ing tested. There should be continuity (closed)  across
the switch terminals.
Figure 30
1.
2.
NO terminal
Common terminal
3.
4.
NC terminal (not used)
Switch lever
Electrical System
Page 5 -- 28
Groundsmaster 4300--D
Product Specification
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