Component Testing; Ignition Switch - Toro ProCore Processor 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 wire harness switch connector
from switch before doing a continuity check on switch).

Ignition Switch

The ignition (key) switch has three positions (OFF, RUN,
and START) (Fig. 5). The switch terminals are posi-
tioned as shown in Figure 6.
Testing
1. Make sure that Processor ignition switch is in the
OFF position. Remove key from the ignition switch.
2. Unplug wire harness connectors from switch and
verify continuity between switch terminals. The circuitry
of the ignition switch is shown in the chart below. With
the use of a multimeter (ohms setting), the switch func-
tions may be tested to determine whether continuity ex-
ists between the various terminals for each switch
position.
3. Reconnect the harness connectors to the switch af-
ter testing.
POSITION
OFF
RUN
START
ProCore Processor
CIRCUIT
G + M + A
B + L + A
B + L + S
Page 5 - - 7
CAUTION
When testing electrical components for continu-
ity with a multimeter (ohms setting), make sure
that power to the circuit has been disconnected.
OFF
Figure 5
L
G
A
Figure 6
HEX NUT
SWITCH
LOCK WASHER
Figure 7
o
45
RUN
o
45
START
M
S
B
KEY
Electrical System