Toro Groundmaster 31900, Service Manual

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Chapter 6
Electrical System
Table of Contents
General Information .............................................................................................................................. 6–2
Traction Unit Operator’s Manual and Accessory Installation Instructions............................................ 6–2
Yanmar Engine Electrical Components.............................................................................................. 6–2
TDM Display/Controller...................................................................................................................... 6–3
CAN bus Communications ................................................................................................................. 6–5
Electrical Schematics and Wire Harness Drawings/Diagrams ............................................................... 6–6
Electrical System Quick Checks ............................................................................................................ 6–7
Testing the Charging System ............................................................................................................. 6–7
Checking the Operation of the Interlock Switches .............................................................................. 6–8
Testing the Electrical Components ........................................................................................................ 6–9
Fusible Link Harness........................................................................................................................ 6–10
Fuses ............................................................................................................................................... 6–12
CAN bus........................................................................................................................................... 6–17
TDM Display/Controller.................................................................................................................... 6–19
Key Switch ....................................................................................................................................... 6–22
PTO Switch ...................................................................................................................................... 6–23
Lift/Lower Switch.............................................................................................................................. 6–24
Glow Plug Switch (Model 31900, 31901, 31907 and 31909) ............................................................ 6–25
Throttle Switch (Model 31902 and 31903)........................................................................................ 6–26
Seat Switch ...................................................................................................................................... 6–27
Traction Neutral Switch .................................................................................................................... 6–29
Parking Brake Switch ....................................................................................................................... 6–32
Cutting Unit High Trim Height Switch ............................................................................................... 6–34
Windshield Washer/Wiper Switch (Model 31903 and 31909) ........................................................... 6–37
Air Conditioning On/Off Switch (Model 31903 and 31909)................................................................ 6–38
Fan Speed Switch (Model 31903 and 31909)................................................................................... 6–39
Multifunction Switch (Optional)......................................................................................................... 6–40
Hazard Switch (Optional) ................................................................................................................. 6–41
Relays with 4 Terminals ................................................................................................................... 6–42
Relays with 5 Terminals ................................................................................................................... 6–45
PTO Clutch ...................................................................................................................................... 6–48
Fuel Pump........................................................................................................................................ 6–50
Transient Voltage Suppression (TVS) Diode .................................................................................... 6–52
Diode Assemblies (Model 31902 and 31903)................................................................................... 6–53
Resistor Assemblies ........................................................................................................................ 6–55
CAN bus Terminator Resistors ......................................................................................................... 6–56
Hydraulic Solenoid Valve Coils......................................................................................................... 6–59
Service and Repairs ........................................................................................................................... 6–61
Caring for the Battery ....................................................................................................................... 6–61
Storing the Battery ........................................................................................................................... 6–62
Servicing the Battery ........................................................................................................................ 6–63
Groundsmaster ® 3200, 3300 and 3310 Page 6–1 Electrical System
19240SL Rev A