Chapter 5: Electrical System - Toro Groundsmaster 4300-D Service Manual

Table of Contents
General Information .............................................................................................................................. 5-3
Electrical Schematic and Wire Harness Drawings/Diagrams ............................................................. 5-3
Toro Electronic Controller (TEC) ........................................................................................................ 5-3
CAN-bus Communications................................................................................................................. 5-3
Yanmar Engine Electronic Control Unit (ECU) ................................................................................... 5-4
Yanmar Engine Electrical Components.............................................................................................. 5-4
Special Tools ......................................................................................................................................... 5-5
Multimeter .......................................................................................................................................... 5-5
Terminal Protector.............................................................................................................................. 5-5
Battery Hydrometer............................................................................................................................ 5-6
Dielectric Gel...................................................................................................................................... 5-6
InfoCenter Display ................................................................................................................................. 5-7
Splash Screen.................................................................................................................................... 5-9
Main Information Screen .................................................................................................................. 5-10
Operator Advisory Screen................................................................................................................ 5-12
Main Menu Screen ........................................................................................................................... 5-13
Faults Screen................................................................................................................................... 5-14
Service Screen................................................................................................................................. 5-17
Diagnostics Screen .......................................................................................................................... 5-19
Settings Screen................................................................................................................................ 5-21
About Screen ................................................................................................................................... 5-23
Troubleshooting................................................................................................................................... 5-24
Operator Advisories ......................................................................................................................... 5-24
Using the InfoCenter Display for Troubleshooting ............................................................................ 5-26
Machine Faults................................................................................................................................. 5-30
Engine Faults ................................................................................................................................... 5-33
Starting Problems ............................................................................................................................ 5-34
General Run and Transport Problems.............................................................................................. 5-36
Cutting Deck Operating Problems.................................................................................................... 5-37
Cutting Deck Lift/Lower Problems .................................................................................................... 5-38
Electrical System Quick Checks .......................................................................................................... 5-39
Testing the Battery (Open Circuit Test) ............................................................................................. 5-39
Testing the Charging System ........................................................................................................... 5-39
Testing the Glow Plug System.......................................................................................................... 5-40
Checking the Operation of the Interlock Switches ............................................................................ 5-40
Adjustments......................................................................................................................................... 5-41
Traction Neutral Switch .................................................................................................................... 5-41
Parking Brake Switch ....................................................................................................................... 5-43
Mow/Transport Switch...................................................................................................................... 5-44
Testing the Electrical Components....................................................................................................... 5-45
Fusible Link Harness........................................................................................................................ 5-45
Fuses ............................................................................................................................................... 5-47
Toro Electronic Controller (TEC) ...................................................................................................... 5-49
Key Switch ....................................................................................................................................... 5-51
PTO Switch ...................................................................................................................................... 5-53
Engine Speed Switch ....................................................................................................................... 5-55
Lower/Raise Joystick Switches ........................................................................................................ 5-57
Headlight Switch .............................................................................................................................. 5-59
Groundsmaster ® 4300-D
16226SL Rev C
Electrical System
Page 5-1
Chapter 5
Electrical System