Starting Problems - Toro Groundsmaster 4500-D Series Service Manual

Starting Problems

Groundsmaster ® 4500-D/4700-D
19245SL Rev A
Note: Check InfoCenter Display for possible operator advisories or faults
whenever diagnosing machine electrical problems.
Problem
No electrical power to machine.
Starter solenoid clicks, but starter will not
crank.
Note: If the solenoid clicks, the problem is not
in the interlock circuit.
No "click", no "crank", no "start" happens when
start attempt is made. InfoCenter display
operates with the ignition switch in the RUN
position.
Note: Use InfoCenter Display to assist with
identifying problem.
Nothing happens when start attempt is made.
InfoCenter display operates with the ignition
switch in the ON position. No Operator
Advisory displayed on InfoCenter.
Starter cranks, but should not, when the
traction pedal is depressed.
Engine cranks, but does not start.
Possible Cause
The battery is discharged.
The battery cables are loose or corroded.
Fuse F−B5 (2 Amp) is faulty.
Ground connection on the machine is loose
or corroded.
The ignition switch or circuit wiring is faulty.
The battery is discharged.
The battery cables are loose or corroded.
A ground wire or cable is loose or corroded.
The wiring at the starter motor is faulty.
The starter solenoid is faulty.
The starter motor is faulty.
The engine crankshaft seized.
Traction pedal position sensor is out of
adjustment.
Traction pedal position sensor or circuit wiring
is faulty.
The seat switch or circuit wiring is faulty.
The parking brake switch or circuit wiring is
faulty.
The start relay or circuit wiring is faulty.
The PTO switch is ON (engaged).
The starter solenoid or starter motor is faulty.
The engine or fuel system is malfunctioning
(see Yanmar Service Manual).
The wiring harness connectors, fuses and
relays are faulty (see
System (page
Fuse for TEC controller(s) are faulty (fuse B5).
Ignition switch or circuit wiring is faulty.
Start relay or circuit wiring is faulty.
Starter solenoid or starter motor is faulty.
Traction pedal position sensor is out of
adjustment.
Traction pedal position sensor or circuit wiring
is faulty.
The fuel tank is empty.
The battery charge is low, voltage drop in start
circuit cables.
The fuel pump or circuit wiring is faulty.
The engine or fuel system is malfunctioning
(see Yanmar Service Manual).
Page 3–27
Chapter 6: Electrical
6–1)).
Troubleshooting: