Toro 03170 Operator's Manual page 33

Function Power In
ON Neutral
— —
Start
— —
Run (Off
Unit)
—
Run (On O
Unit)
—
Mow O
— —
Backlap
—
Hi Temp
• (–) Indicates a circuit closed to ground — LED ON.
• (O) Indicates a circuit open to ground or
de-energized — LED OFF.
• (+) Indicates an energized circuit (clutch coil,
solenoid, or start input) — LED ON.
• A Blank indicates a circuit that is not involved with
the logic.
To troubleshoot, turn on the key without starting the
engine. Identify the specific function that does not
work and work across the logic chart. Inspect the
condition of each input LED's to ensure that it matches
the logic chart.
If the input LEDs are correct, check the output LED.
If the output LED is illuminated but the device is not
energized, measure the available voltage at the output
device, the continuity of the disconnected device, and
the potential voltage on the ground circuit (floating
ground). Repairs will vary depending on your findings.
INPUTS
Start ON Brake PTO ON
ON
+
O O
O O O
—
O O
— —
O
—
O O
O
In Seat Hi Temp Backlap
—
O
O O
—
O
—
O
O O
—
33
OUTPUTS
Start ETR
+ +
O
+
O O
+
O O
+
O O
—
+
O
O O
PTO
O
O
O
+
+
O