Toro 30344 Operator's Manual page 35

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 the On position and ensure the
red power LED is illuminated.
3. Move all input switches to ensure all LED's change
state (Seat, Brake, Traction Pedal, PTO, and Start).
4. Position input devices at appropriate position to
achieve the appropriate output. Use the following
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.
Figure 33
35