Toro Groundsmaster 3500 30807 Service Manual page 207

Standard Control Module (SCM) Logic Chart
Each line of the following chart identifies the necessary
component position (INPUTS) in order for the Standard
Control Module (SCM) to energize the appropriate
OUTPUTS for machine operation.
Engine Start (Operator in Seat)
Engine Start (No Operator in Start)
Engine Run (Operator in Seat)
Engine Run (No Operator in Seat)
High Temperature Warning (Gasoline Engine ONLY)
High Temperature Shutdown (Diesel Engine ONLY)
IMPORTANT (Diesel Engine Units): The
temperature warning light illuminates when engine
coolant temperature exceeds 221F (105C). The en-
gine shuts down and the console temperature warn-
ing light remains illuminated when the engine
coolant temperature exceeds 230F (110C). The en-
gine should be allowed to cool to a temperature be-
low 221_ F (105_ C). The cooling system should be
checked before returning the machine to service.
Groundsmaster 3500
−
−
−
−
−
Mow
−
−
* Parking Brake circuit is open to ground when parking brake is ON (applied)
KEY TO CHART
−
LED ON − Circuit closed to ground
LED ON − Circuit is energized
+
LED OFF − Circuit is open to ground or circuit is de−energized
Circuit is not involved with this machine function (LED OFF)
NA Backlap Input is not used on the Groundsmaster 3500
console
Page 6 − 13
Example: To start the engine the following conditions
must be met: the ignition key is in START, the operator
is in the seat, the traction control pedal is in the neutral
position and the parking brake is applied. When these
conditions are met the Energize to Run (ETR) and En-
gine Start relays are energized.
INPUTS
+ − − − −
+ −
− − −
−
− − − −
−
IMPORTANT (Gasoline Engine Units): During ma-
chine operation, the PTO shuts down and the con-
sole temperature warning light illuminates when the
engine coolant temperature exceeds 230F (110C).
Under this condition the operator should avoid
shutting off the engine, push the PTO switch to OFF
(disengage), slowly drive to a safe flat area, move
the throttle lever to the SLOW position, release the
traction control pedal to the neutral position and en-
gage the parking brake. The engine should be al-
lowed to idle at low speed until it cools to a safe
level. The cooling system should be checked before
returning the machine to service.
OUTPUTS OUTPUTS
NA + + + +
NA + + + +
NA + +
+ +
NA
+ + + +
NA
+ +
NA
− −
NA
Electrical System