Table of Contents
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Function
Power
On
–
Start
–
Run (off unit)
–
Run (on unit)
–
Mow
–
Backlap
–
Hi-Temp
Note: - 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 it
matches the logic chart.
If the input LED's are correct, check the output
LED. If the output LED is illuminated but the
device is not energized, measure available voltage at
the output device, continuity of the disconnected
device, and potential voltage on the ground circuit
(floating ground). Repairs will vary depending on
your findings.
In Neutral Start On Brake Off PTO On
–
+
O
–
O
O
–
O
O
–
O
O
–
O
O
O
Inputs
In Seat
Hi Temp
–
O
O
O
–
O
–
–
–
O
34
Backlap
Start
+
O
O
O
O
O
O
O
O
O
O
O
–
O
O
–
O
Outputs
ETR
PTO
+
O
+
O
+
O
+
+
+
+
O
O
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