Ignition Switch - Toro Groundsmaster 4500-D Series Service Manual

Ignition Switch

Testing
Electrical System: Component Testing
FRONT VIEW
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The ignition (key) switch on the console arm has three (3) positions (OFF,
ON/PREHEAT and START).
Note: Before disconnecting the ignition switch for testing, the switch and its
circuit wiring should be tested as a TEC electrical input using the InfoCenter
Display (see InfoCenter Display (page
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 procedure.
1. Park machine on a level surface, lower cutting decks, engage parking brake
and stop engine. Remove key from ignition switch.
2. Remove console arm covers to gain access to ignition switch (see
Arm (page 8–10)).
3. Disconnect wire harness connector from ignition switch.
4. The ignition switch terminals are identified in
of the switch is shown in below table. 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 terminals.
SWITCH POSITION
OFF
ON/PREHEAT
START
Note: Ignition switch terminals 1 and 6 are connected internally. Terminals 4
and 5 are also connected internally. These terminals should have continuity
regardless of switch position.
5. Replace ignition switch if testing determines that it is faulty.
6. If the ignition switch tests correctly and a circuit problem still exists, check
wire harness (see Appendix A (page
7. After testing is complete, connect machine wire harness connector to ignition
switch. Secure console arm covers to machine with removed fasteners (see
Console Arm (page
OFF
ON/PREHEAT
START
Figure 185
6–8)). If input testing verifies that the
A–1)).
8–10)).
Page 6–26
REAR VIEW
Console
Figure 185 and the circuitry
CIRCUITS
1 + 6, 4 + 5
1 + 3 + 4 + 5 + 6
1 + 2 + 4 + 5 + 6
Groundsmaster ® 4500-D/4700-D
19245SL Rev A