Toro Groundsmaster 7210 Service Manual page 220

Testing the Key Switch
Electrical System: Testing the Electrical Components
g033642
The key switch (item 1 in
S ) (Figure 148). The key switch terminals are identified as shown in
TART
149.
The Standard Control Module (SCM) monitors the operation of the key switch.
When the key switch is in the O
illuminated.
1. Before you disconnect the key switch for testing, ensure that you test the
switch and its circuit wiring as a SCM input; refer to
(page 5–3).
2. If the SCM verifies that the key switch and circuit wiring are functioning
correctly, no further switch testing is necessary.
3. If the SCM determines that the key switch and circuit wiring are not
functioning correctly, then test the key switch as follows:
A. Ensure that the key switch is in the O
harness connector from the key switch.
B. The circuitry of the key switch is shown in the
5–24). With the use of a multimeter (ohms setting), test the switch
functions to determine if the continuity exists between the various
terminals for each switch position. Check the continuity between the
switch terminals.
C. Replace the key switch if necessary.
D. If the key switch testing is correct and the circuit problem still exists,
check the wire harness; refer to the Electrical Schematics and Wire
Harness Drawings/Diagrams in Appendix A—Foldout Drawings.
E. Connect the machine wire harness connector to the key switch.
Circuit Logic Table
Switch Position
O
FF
O /P
N REHEAT
S
TART
Figure 149
Figure 147) has 3 positions (O
position, the SCM power input LED must be
N
FF
Normal Circuits
None
B+A+I
B+S+I
Page 5–24
, O /P
FF N REHEAT
Standard Control Module
position. Disconnect the wire
Circuit Logic Table (page
Other Circuits
None
X+Y
None
Groundsmaster 7210
16222SL Rev C
, and
Figure