Standard Control Module (Scm) - Toro 30856 Operator's Manual

This product is designed to drive objects into
the ground where they lose energy quickly
in grass areas. However, careless operation,
combined with terrain angle, ricochets, or
improperly positioned safety guard can lead to
thrown object injuries.
• When a person or pet appears suddenly in or
near the mowing area, stop mowing.
• Do not resume mowing until the area is
cleared.
Important: Allow engine to idle for 5 minutes
before shutting it off after a full load operation.
This allows the turbo charger to cool down before
shutting the engine off. Failure to do so may lead
to turbo-charger trouble.
Before stopping the engine, disengage all controls and
move the throttle to Slow. Moving the throttle to Slow
reduces high engine RPM, noise, and vibration. Turn
the key to Off to stop the engine.
Standard Control Module
(SCM)
The Standard Control Module is a "potted" electronic
device produced in a "one size fits all" configuration.
The module uses solid state and mechanical
components to monitor and control standard electrical
features required for safe product operation.
1. Input
2. Backlap
3. High temp shutdown
4. High temp warning
Here are the logical troubleshooting steps for the SCM
device.
5. In seat
6. PTO switch
7. Park brake off
8. Neutral
The module monitors inputs including neutral, parking
brake, PTO, start, backlap, and high temperature. The
module energizes outputs including PTO, Starter, and
ETR (energize to run) solenoid.
The module is divided into inputs and outputs. Inputs
and outputs are identified by green LED indicators
mounted on the printed circuit board.
The start circuit input is energized by 12 VDC. All
other inputs are energized when the circuit is closed to
ground. Each input has a LED that is illuminated when
the specific circuit is energized. Use the input LED's
for switch and input circuit troubleshooting.
Output circuits are energized by an appropriate set of
input conditions. The three outputs include PTO, ETR,
and START. Output LED's monitor relay condition
indicating the presence of voltage at one of three
specific output terminals.
Output circuits do not determine output device
integrity so electrical troubleshooting includes output
LED inspection and conventional device and wire
harness integrity testing. Measure disconnected
component impedance, impedance through wire
harness (disconnect at SCM), or by temporarily "test
energizing" the specific component.
The SCM does not connect to an external computer or
hand held device, can not be re-programmed, and does
not record intermittent fault troubleshooting data.
The decal on the SCM only includes symbols. Three
LED output symbols are shown in the output box.
All other LED's are inputs. Figure 19 identifies the
symbols.
Figure 19
9. Output
10. PTO
11. Start
12. ETR
1. Determine the output fault you are trying to resolve
(PTO, START, or ETR).
25
13. Start
14. Power