Understanding The Diagnostic Light; Diagnostic Ace Display; Checking The Interlock; Switches - Toro 03540 Reelmaster 5200-D Operator's Manual

are designed to allow assembly only when the
two halves of the shaft are properly oriented.
Understanding the
Diagnostic Light
The machine is equipped with a diagnostic light
which indicates if the electronic controller is
functioning correctly. The green diagnostic light
is located under the control panel, next to the
fuse block (Figure 37). When the electronic
controller is functioning correctly and the key
switch is moved to the On position, the controller
diagnostic light will be illuminated. The light will
blink if the controller detects a malfunction in the
electrical system. The light will stop blinking and
automatically reset when the key switch is turned
to the Off position.
Figure 37
1. Diagnostic light
When the controller diagnostic light blinks, one of
the following problems has been detected by the
controller:
• One of the outputs has been shorted.
• One of the outputs is open circuited.
Using the diagnostic display, determine which
output is malfunctioning; refer to Checking the
Interlock Switches.
If the diagnostic light is not illuminated when the
key switch is in the On position, this indicates that
the electronic controller is not operating. Possible
causes are as follows:
• Loop-back is not connected.
• The light is burned out.
• Fuses are blown.
• It is not functioning correctly.
Check the electrical connections, input fuses, and
diagnostic light bulb to determine the malfunction.
Ensure that the loop-back connector is secured to
the wire harness connector.

Diagnostic Ace Display

The machine is equipped with an electronic
controller which controls most machine functions.
The controller determines what function is
required for various input switches (i.e. seat
switch, key switch, etc.) and turns on the outputs
to actuate solenoids or relays for the requested
machine function.
For the electronic controller to control the
machine as desired, each of the input switches,
output solenoids, and relays must be connected
and functioning properly.
Use the Diagnostic ACE display to help verify and
correct electrical functions of the machine.

Checking the Interlock

Switches

The purpose of the interlock switches are to
prevent the engine from cranking or starting
unless the traction pedal is in the Neutral position,
the Enable/Disable switch is in the Disable
position, and the Lower Mow/Raise control is
in the Neutral position. In addition, the engine
should stop when the traction pedal is pressed
with operator off of the seat.
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