Toro GreensPro 1240, Service Manual

Page: 126 / 186

Parking Brake Switch (machine serial number above 31500000)
g238116
Figure 49
1. Parking brake lever 2. Parking brake switch
A parking brake switch as part of the machine interlock system ( Figure ? ). The
parking brake switch is located below the brake lever. When the parking brake
is applied, the parking brake lever presses the parking brake switch plunger,
closing the switch. The parking brake lever moves away from the switch when
the parking brake is released, allowing the switch to return to its normally open
condition. The interlock module monitors the position of the parking brake switch
(open or closed). Using inputs from the parking brake switch and other switches
in the interlock system, the interlock module opens or closes the engine ignition
circuit (controls circuit ground).
Testing the Parking Brake 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 parking brake 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 the parking brake is applied
(raised), and open (no continuity exists between the terminals) when the
parking brake is released (lowered).
5. Replace the parking brake switch if testing determines that it is damaged.
6. If the parking brake 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 parking brake switch.
Electrical System: Testing the Electrical Components Page 6–22 GreensPro ™ 1240/1260
14211SL Rev A