Speed/Throttle Lock Coil - Toro Multi Pro 1750 Service Manual

Speed/Throttle Lock Coil

The speed/throttle lock coil is attached to the frame next
to the accelerator lever (Fig. 73). The speed/throttle lock
coil is energized by the Toro Electronic Controller (TEC)
output when the speed lock or throttle lock feature is
used. The energized coil becomes a magnet to hold the
accelerator lever in position to maintain engine speed.
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
1. Park machine on a level surface, stop spray pump,
stop engine and engage parking brake. Remove key
from ignition switch.
2. Locate control coil next to accelerator lever under the
floorboard. Unplug coil connector from machine wire
harness.
NOTE: Prior to taking small resistance readings with a
digital multimeter, short the meter test leads together.
The meter will display a small resistance value (usually
0.5 ohms or less). This resistance is due to the internal
resistance of the meter and test leads. Subtract this val-
ue from from the measured value of the component you
are testing.
3. Using a multimeter (ohms setting), verify control coil
resistance between the two terminals of the connector.
Resistance should be from 10.2 to 11.2 ohms.
4. If coil does not engage when voltage is applied or coil
resistance is incorrect, replace control coil.
5. If the coil tests correctly and a circuit problem still ex-
ists, check wire harness (see Electrical Schematic and
Wire Harness Drawings in Chapter 10 − Electrical Draw-
ings in this manual).
6. Connect the coil connector to the machine wire har-
ness after testing is completed.
Electrical System
2 1
3
1. Accelerator lever
2. Speed control coil
Page 5 − 54
Figure 73
3. Coil connector
Multi Pro 1750