Toro 41188, Service Manual

Page: 150 / 353

Multi Pro 1750
Page 5 − 48
Electrical System
Speed/Throttle Lock Switch
The speed/throttle lock switch for the Multi Pro 1750 is
used to turn the speed lock feature (vehicle in motion)
or throttle lock feature (vehicle stationary) ON or OFF.
When in the ON position, the light on the switch is illu-
minated. The Toro Electronic Controller (TEC) monitors
the operation of the speed/throttle lock switch as an in-
put and provides an output to energize the speed/throt-
tle lock coil when appropriate. The speed/throttle lock
switch is located on the control console below the Info-
Center Display (Fig. 62).
The speed lock is activated when the transmission is not
in neutral and the clutch pedal is released (engaged). In
addition, the operator must be in the seat, the parking
brake is not set, the spray pump switch is set to ON, and
then the throttle lock switch is set to ON. Use the speed
lock to maintain a constant speed while spraying.
The throttle lock is activated when the transmission is in
neutral, the parking brake is set, the spray pump switch
and throttle lock switch is set to ON. Use the throttle lock
for stationary hand sprayer operation.
Testing
The speed/throttle lock switch and its circuit wiring can
be tested as a TEC input using the InfoCenter Display
(see InfoCenter Display − Diagnostics Screen in this
chapter). If testing determines that the switch and circuit
wiring are not functioning correctly, proceed with the fol-
lowing test procedure:
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 speed/throttle lock
switch and unplug machine wire harness connector
from switch.
3. With the use of a multimeter (ohms setting), the
speed/throttle lock switch functions may be tested to de-
termine whether continuity exists between the various
terminals for each switch position. The switch terminals
are marked as shown (Fig. 63) and the circuitry of the
switch is shown in the table (Fig. 64). Verify continuity
between switch terminals.
4. Terminals 7 (−) and 8 (+) are used for the indicator
light in the speed/throttle lock switch. The light should be
illuminated when the switch is in the ON position.
5. Replace the speed/throttle lock switch if testing de-
termined that it is faulty.
1. Control console 2. Speed/throttle lock
switch
Figure 62
1
2
Figure 63
BACK OF SWITCH
SWITCH
POSITION
CLOSED
CIRCUITS
OPEN
CIRCUITS
ON 2 + 3 2 + 1
NEUTRAL NONE ALL
OFF 2 + 1 2 + 3
Figure 64
NOTE: Speed/throttle lock switch terminals 1, 4, 5 and
6 are not used on Multi Pro 1750 machines.
6. If the switch tests correctly and a circuit problem still
exists, check wire harness (see Electrical Schematic
and Wire Harness Drawings in Chapter 10 − Electrical
Drawings in this manual).
7. Connect the harness connector to the switch after
testing. Install console panel to machine.
Electrical
System