Toro GreensPro 1240, Service Manual

Page: 124 / 186

Seat Switch (machine serial number above 31500000)
g238117
Figure 47
GreensPro 1240
1. Operator seat 2. Seat switch
An operator’s seat switch as part of the machine interlock system. The seat
switch is attached to the bottom of the seat (
Figure ? ). When an operator sits
in the seat, the seat cushion presses the switch plunger and closes the switch.
When the seat is empty the switch is allowed to return to its normally open
position. The interlock module monitors the position of the seat switch (open or
closed). Using inputs from the seat switch and other switches in the interlock
system, the interlock module opens or closes the engine ignition circuit (controls
circuit ground).
Note: Beginning with machine serial number 40190001, an adhesive backed
spacer (puck) was added to the top of the seat switch to improve switch
sensitivity. The puck may be added to the seat switch on all GreensPro machines
if necessary.
Testing the Seat Switch
1. Park the machine on a level surface, engage the parking brake, and shut off
the engine.
2. Disconnect the wire harness connector from the seat switch.
3. Check the wire harness connector for corrosion and clean the connector
if necessary.
4. Use a multimeter (ohms setting) and test the switch. The switch is closed
(continuity exists between the terminals) when weight is applied to the seat
cushion, and open (no continuity exists between the terminals) when the
seat is empty.
5. Replace the seat switch if testing determines that it is damaged.
6. If the seat switch testing is correct and a circuit problem still exists, check
the wire harness for the circuit continuity; refer to the Electrical Schematics
and Wire Harness Drawings/Diagrams (page 6–3) .
7. After testing, apply a film of dielectric grease to the switch terminals and
connect the machine wire harness connector to the seat switch.
Electrical System: Testing the Electrical Components Page 6–20 GreensPro ™ 1240/1260
14211SL Rev A