Key Switch - Toro Groundsmaster 4300-D Service Manual

Key Switch

Testing the Key Switch
Groundsmaster ® 4300-D
16226SL Rev C
g190808
1. Key switch
g190999
The key switch is located on the control arm and has 3 positions: O
and S (Figure 162).
TART
The Toro Electronic Controller (TEC) monitors the operation of the key switch.
1. Park the machine on a level surface, lower the cutting decks, set the parking
brake, and shut off the engine. Remove the key from the key switch.
2. Before you disconnect the key switch for testing, ensure that you test the
switch and its circuit wiring as a TEC electrical input with the InfoCenter
display; refer to Using the InfoCenter Display for Troubleshooting (page
5–26).
3. If the input testing verifies that the key switch and circuit wiring are functioning
correctly, no further key switch testing is necessary.
4. If the input testing determines that the key switch and circuit wiring are not
functioning correctly, proceed with the following key switch testing procedure.
5. Remove the right control arm cover to get access to the key switch; refer to
Disassembling the Control Arm (page
6. Ensure that the key switch is in the O
connector from the key switch.
7. The key switch terminals are identified in
switch is shown in the
multimeter (ohms setting), test the switch functions to determine if continuity
exists between the various terminals for each switch position. Check the
continuity between the switch terminals.
Figure 161
2. Control arm
Figure 162
6–24).
position. Disconnect the wire harness
FF
Figure 162
Circuit Logic Table (page
Page 5–51 Electrical System: Testing the Electrical Components
, R
FF UN
and the circuitry of the
5–52). With the use of a
,