Towing The Traction Unit; Standard Control Module (Scm) - Toro 30807 Operator's Manual

Note: The machine is equipped with an interlock switch on
the parking brake. The engine will stop if the traction pedal is
pressed with the parking brake engaged.

Towing the Traction Unit

In case of an emergency, the machine can be towed for a
short distance; however, Toro does not recommend this as
a standard procedure.
Important: Do not tow the machine faster than 3 to
4 km/h (2 to 3 MPH) because the drive system may
become damaged. If the machine must be moved a
considerable distance, transport it on a truck or trailer.
1. Locate the bypass valve on the pump (Figure 32) and
rotate it 90°.
1. Bypass valve
2. Before starting the engine, close the bypass valve by
rotating it 90° (1/4 turn). Do not start the engine when
the valve is open.
Standard Control Module
(SCM)
The Standard Control Module is a potted electronic device
produced in a one size fits all configuration. The module
Figure 32
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.
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. The chart below identifies the symbols.
Figure 33
30