Toro Groundsmaster 5900 Series Service Manual page 48

Troubleshooting:
Problem
Nothing happens when start attempt is made
(engine does not crank). InfoCenter display
operates with the key switch in the RUN
position.
Engine cranks, but does not start.
Engine cranks, but should not, when the
traction pedal is depressed.
Possible Cause
The key switch or circuit wiring is faulty.
Traction pedal position sensor or circuit wiring
is faulty.
The seat switch or circuit wiring is faulty (when
trying to start engine in seat).
The parking brake switch or circuit wiring is
faulty (when trying to start engine out of seat).
The start relay or circuit wiring is faulty.
The fusible link is loose, corroded or faulty.
The starter solenoid or starter motor is faulty.
TEC power relay 2 or circuit wiring is faulty.
Master controller fuses (F−D1 or F−B1) are
faulty.
Yanmar Engine ECU power fuse (25 Amp) is
faulty.
The engine ECU is malfunctioning (see
Service Manual
Manual).
The master controller is faulty.
Engine and/or fuel may be too cold.
The glow relay or circuit wiring is faulty.
Fuel tank is empty.
Electric fuel pump is faulty.
Hydraulic load is slowing engine cranking
speed.
The engine, engine ECU or fuel system is
malfunctioning (see
Traction pedal position sensor is out of
adjustment.
Traction pedal position sensor or circuit wiring
is faulty.
Page 3–10
Yanmar
and Yanmar Troubleshooting
Yanmar Service Manual).
Groundsmaster ® 5900 & 5910
16227SL Rev B