Throttle Switch (Model 31902 and 31903)
POSITION
CLOSED
CIRCUITS
INCREASE
SPEED
2 + 3, 5 + 6
NEUTRAL
NONE
DECREASE
SPEED
2 + 1, 5 + 4
The throttle switch is located on the operator’s console. When the front of the
switch is depressed, the engine speed (RPM) will increase. When the rear of the
switch is depressed, the engine speed (RPM) will decrease. Refer to the engine
specification tables in
Chapter 2 (page 2–1)
for the minimum and maximum
engine RPM for specific Groundsmaster 3200/3300/3310 machines.
The TDM display/controller monitors signals from the throttle switch. The TDM
display controller communicates the increase/decrease requests to the Yanmar
engine ECU via the CAN network.
Testing the Throttle Switch
The throttle switch and its circuit wiring can be tested using the TDM
display/controller; refer to
Using the TDM Display/Controller Screens for
Troubleshooting (page 3–12)
. If testing determines that the switch and circuit
wiring are not functioning correctly, proceed with the following test procedure:
1. Park the machine on a level surface, lower the cutting unit (or attachment),
engage the parking brake, set the key switch to the O
FF
position and remove
the key from the key switch.
2. Disconnect the battery negative (-) cable at the battery; refer to
and Installing the Battery (page 6–64)
.
3. Remove the operator’s console covers; refer to
Operator’s Console Covers (page 7–23)
.
4. Disconnect the wire harness connector from the switch and remove the
switch from the console if necessary. Check the switch and the harness
connector for damage or corrosion and clean or repair if necessary.
5. Use a multimeter (ohms setting) and the preceding table to determine
whether continuity exists between the various terminals for each switch
position.
6. Replace the switch if necessary.
7. If the switch tests correctly and a circuit problem still exists, check the wire
harnesses; refer to
Appendix A (page A–1)
.
8. Install the switch and connect the wire harness after testing.
9. Install the console covers.
10. Connect the battery negative (-) cable at the battery.
Electrical System: Testing the Electrical Components
Page 6–26
Groundsmaster
®
3200, 3300 and 3310
19240SL Rev A
Summary of Contents for Groundmaster 31900
Page 4: ...Reader Comments Page 4 Groundsmaster 3200 3300 and 3310 19240SL Rev A...
Page 16: ...Safety Safety and Instructional Decals Page 1 8 Groundsmaster 3200 3300 and 3310 19240SL Rev A...
Page 86: ...Engine Service and Repairs Page 4 24 Groundsmaster 3200 3300 and 3310 19240SL Rev A...
Page 332: ...Operator Cab Service and Repairs Page 9 18 Groundsmaster 3200 3300 and 3310 19240SL Rev A...
Page 355: ......
