Standard Control Module (Scm) - Toro 30868 Groundsmaster 4700-D Operator's Manual
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- Service manual (298 pages) ,
- Installation instructions manual (20 pages) ,
- Operator's manual (92 pages)
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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.
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.
Here are the logical troubleshooting steps for the SCM
device.
1. Determine the output fault you are trying to resolve
(PTO, START, or ETR).
2. Move key switch to "ON" and ensure the red
"power" LED is illuminated.
3. Move all input switches to ensure all LED's change
state.
4. Position input devices at appropriate position to
achieve the appropriate output. Use the following
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 16 identifies the
symbols.
Figure 16
logic chart to determine the appropriate input
condition.
5. If specific output LED is illuminated without
appropriate output function, check output harness,
connections, and component. Repair as required.
6. If specific output LED is not illuminated, check
both fuses.
7. If specific output LED is not illuminated and
inputs are in appropriate condition, install new
SCM and determine if fault disappears.
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