Reader Comments .........................................................................................................................................2

Revision History .............................................................................................................................................3

Safety ...................................................................................................................................................................7

Maintenance and Service ...............................................................................................................................7

General Information...............................................................................................................................................8

External Reference Material ...........................................................................................................................8

Toro DIAG Software .......................................................................................................................................8

Acronyms .......................................................................................................................................................9

Glossary .........................................................................................................................................................9

General Electrical Diagnostic Information............................................................................................................10

Consumable Materials List ...........................................................................................................................10

Special Tools ................................................................................................................................................10

Inspecting the Harness and Component Connector Assemblies ..................................................................10

Repairing the Wire Insulation ....................................................................................................................... 11

Testing the Electrical Circuits........................................................................................................................ 11

InfoCenter Diagnostics .................................................................................................................................12

InfoCenter Icons ...........................................................................................................................................13

InfoCenter Screen Map ................................................................................................................................15

Troubleshooting Intermittent Electrical Faults...............................................................................................16

Frequently Used Procedures ...............................................................................................................................17

Connecting and Disconnecting the 12 V Battery...........................................................................................17

Connecting and Disconnecting the 48 V Power to the Cutting Reel Motors ...................................................18

Reading Faults .............................................................................................................................................18

Clearing Faults from the InfoCenter..............................................................................................................19

Preparing for Troubleshooting and/or Testing ...............................................................................................20

Returning the Machine to Service.................................................................................................................21

Toro DIAG-Quick Start .................................................................................................................................22

Replacing a Toro Electronic Controller (TEC) ...............................................................................................23

Fault 12: 48 V Contactor Open............................................................................................................................26

Fault 13: High Temperature Warning - Reel Motor 1 ...........................................................................................32

Fault 14: High Temperature Warning - Reel Motor 2 ...........................................................................................35

Fault 15: High Temperature Warning - Reel Motor 3 ...........................................................................................38

Fault 16: High Temperature Warning - Starter/Generator ...................................................................................41

Fault 17: Motor Speed Stall - Cutting Unit 1 ........................................................................................................44

Fault 18: Motor Speed Stall - Cutting Unit 2 ........................................................................................................47

Fault 19: Motor Speed Stall - Cutting Unit 3 ........................................................................................................50

Fault 21: Model Number Unknown ......................................................................................................................53

Fault 22: 48 Volt Devices Offline..........................................................................................................................55

Fault 23: CAN Bus Fault - Reel Motor 1..............................................................................................................65

Fault 24: CAN Bus Fault - Reel Motor 2..............................................................................................................73

Fault 25: CAN Bus Fault - Reel Motor 3..............................................................................................................81

Fault 26: CAN Bus Fault - Starter/Generator ......................................................................................................89

Fault 29: Master Board Internal Error ..................................................................................................................95

Fault 31: Engine Coolant Temperature Sender Out Of Range .............................................................................96

Fault 32: Engine Coolant Temperature High - Engine Kill .................................................................................102

Fault 33: 48 Volt Keyswitch Undervolt - Reel Motor 1........................................................................................106

Fault 34: 48 Volt Keyswitch Undervolt - Reel Motor 2........................................................................................ 114

Fault 35: 48 Volt Keyswitch Undervolt - Reel Motor 3........................................................................................122

Fault 36: 48 Volt Keyswitch Undervolt - Starter/Generator................................................................................130

Fault 37: Fan Relay - Current Too High ............................................................................................................132

Fault 39: Master TEC Internal Error...................................................................................................................134

Fault 41: 48 Volt Precharge Circuit Fault ...........................................................................................................136

Fault 43: Hydraulic Oil Temperature Sensor - Overtemp...................................................................................138

Fault 44: 48 Volt Battery - Undervolt .................................................................................................................140

Fault 45: 48 Volt Bus - Overvoltage ..................................................................................................................142

Fault 46: 48 Volt Keyswitch - Overvoltage ........................................................................................................144