Component Testing; Ignition Switch - Toro Groundsmaster 360 Service Manual

Component Testing

For accurate resistance and/or continuity checks, elec-
trically disconnect the component being tested from the
circuit (e.g. unplug the ignition switch connector before
doing a continuity check on the switch).
NOTE: For engine component testing information, see
the Kubota Workshop Manual, Diesel Engine, 05--E3B
Series that is included after Chapter 3 -- Kubota Diesel
Engine.

Ignition Switch

The ignition (key) switch is located on the control panel
and has three positions: OFF, RUN and START (Fig.
21).
On 2WD machines, the Standard Control Module
(SCM) monitors the operation of the ignition switch.
When the ignition switch is in the RUN or START posi-
tion, the SCM power input LED should be illuminated. If
the ignition switch is in the START position, the SCM
start input LED should be illuminated.
On 4WD machines, the Toro Electronic Controller (TEC)
monitors the operation of the ignition switch.
Testing
1. Park machine on a level surface, lower cutting deck,
engage parking brake and stop engine.
2. Before disconnecting the ignition switch for testing,
the switch 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 ignition switch and circuit wiring are functioning
correctly, no further ignition switch testing is necessary.
If, however, input testing determines that the ignition
switch and circuit wiring are not functioning correctly,
proceed with the following ignition switch testing proce-
dure.
3. Remove control panel to gain access to ignition
switch (see Control Console Disassembly in the Service
and Repairs section of Chapter 6 -- Chassis).
4. Make sure ignition switch is in the OFF position. Dis-
connect wire harness connector from ignition switch.
Groundsmaster 360
When testing electrical components for continu-
ity with a multimeter (ohms setting), make sure
that power to the circuit has been disconnected.
5. The ignition switch terminals are identified in Figure
21 and the circuitry of the switch is shown in the chart in
Figure 22. With the use of a multimeter (ohms setting),
the switch functions can be tested to determine whether
continuity exists between the various terminals for each
switch position. Verify continuity between switch termi-
nals.
6. Replace ignition switch if testing determines that it is
faulty.
7. If the ignition switch tests correctly and a circuit prob-
lem still exists, check wire harness (see Electrical Sche-
matics and Wire Harness Drawings in Chapter 9 --
Foldout Drawings).
8. After testing is complete, connect machine wire har-
ness connector to ignition switch. Secure control panel
to machine with removed fasteners.
RUN
o
45
OFF
FRONT VIEW
SWITCH
POSITION
OFF
RUN
START
Page 5 - - 25
CAUTION
o
45
START
A
B
C
REAR VIEW
Figure 21
CIRCUITS
NONE
B + C + F, D + E
A + B + C
Figure 22
Electrical System
F
E
D