Toro 41188, Service Manual

Page: 136 / 353

Multi Pro 1750
Page 5 − 34
Electrical System
Ignition Switch
The ignition (key) switch is located on the control con-
sole and has three (3) positions: STOP, RUN and
START (Fig. 33). The ignition switch is an input for the
Toro Electronic Controller (TEC).
Testing
The ignition switch and its circuit wiring can be tested as
a TEC input using the InfoCenter Display (see InfoCen-
ter Display − Diagnostics Screen in this chapter). If test-
ing verifies that the ignition switch and circuit wiring are
functioning correctly, proceed to step 5. If, however, test-
ing determines that the switch and circuit wiring are not
functioning correctly, proceed with the following test pro-
cedure:
1. Park machine on a level surface, stop spray pump,
stop engine and engage parking brake. Remove key
from ignition switch.
2. Remove console panel. Locate ignition switch on
console and unplug machine wire harness connector
from switch.
3. The ignition switch terminals are identified as shown
in Figure 33. 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.
4. Replace switch if testing identifies that switch is
faulty.
5. If ignition switch tests correctly and circuit problem
still exists, check wire harness (see Electrical Schemat-
ics and Wire Harness Drawings in Chapter 10 − Foldout
Drawings).
6. After testing is completed, connect the wire harness
connector to the ignition switch.
7. After testing is complete, connect machine wire har-
ness connector to ignition switch. Install console panel
to machine.
Figure 33
REAR VIEW
FRONT VIEW
START
STOP
RUN
3
2
4
5
6 1
SWITCH
POSITION CIRCUITS
STOP 1 + 6
RUN 1 + 3 + 4 + 5 + 6
START 1 + 2 + 4 + 5 + 6
Figure 34
NOTE: Ignition switch terminals 1 and 6 are connected
internally. Terminals 4 and 5 are also connected internal-
ly. These terminals should have continuity regardless of
switch position.