Toro Greensmaster 3120 Service Manual page 192

Starting Problems (continued)
Engine cranks, but does not start.
Engine cranks (but should not) with the function control lever
in the MOW or TRANSPORT position.
General Run and Transport Problems
Engine kills when the function control lever is in the MOW or
TRANSPORT position with the operator in the seat.
Battery does not charge.
Engine stops during operation (operator sitting on seat).
Cutting Unit Operating Problems
Electrical System: Troubleshooting
Problem
Problem
Possible Causes
Wiring to the start circuit components is loose, corroded or
damaged; refer to Electrical Schematics and Wire Harness
Drawings/Diagrams in
Engine wiring is loose, corroded or damaged; refer to
Electrical Schematics and Wire Harness Drawings/Diagrams
in Appendix A (page A–1).
Diode D1-A circuit is open.
Engine or fuel system is malfunctioning; refer to
Engine (page 3–1).
Kill relay (K1) is faulty.
Engine and fuel may be too cold.
Engine and fuel may be too cold.
Neutral switch is out of adjustment, faulty or its wiring is
shorted.
Possible Causes
Operator is sitting too far forward on the seat (seat switch
not depressed).
Parking brake is set.
Parking brake sensor is faulty.
Seat switch is faulty.
Seat switch wiring is loose, corroded or damaged.
Wiring to the charging circuit components is loose, corroded
or damaged; refer to Electrical Schematics and Wire Harness
Drawings/Diagrams inAppendix A (page
Voltage regulator is loose or not grounded to engine.
Voltage regulator is faulty.
Alternator stator (under engine flywheel) is faulty.
Alternator fusible link (included in engine wire harness) is
open.
Ignition switch is faulty.
Battery is faulty.
Operator moved too far forward on the seat (seat switch
not depressed).
Wiring to the run circuits components are faulty or
disconnected; refer to Electrical Schematics and Wire
Harness Drawings/Diagrams
Engine or fuel system is malfunctioning; refer to
Engine (page 3–1).
Page 5–6
Appendix A (page A–1).
Chapter 3:
A–1).
inAppendix A (page A–1).
Chapter 3:
Greensmaster 3120
17230SL Rev C