Understanding The Diagnostic Ace Display; Checking The Interlock Switches - Toro Reelmaster 3555 Operator's Manual

Figure 39
1. Diagnostic light
When the controller diagnostic light blinks, 1 of the following
problems has been detected by the controller:
•
An output has been shorted.
•
An output is open circuited.
Using the diagnostic display, determine which output is
malfunctioning; refer to

Checking the Interlock Switches

(page 30).
If the diagnostic light is not illuminated when the key switch is
in the O position, this indicates that the electronic controller
N
is not operating. Possible causes are as follows:
•
The 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.
Understanding the 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
Service Interval: Before each use or daily
The purpose of the interlock switches is to prevent the engine
from cranking or starting unless the traction pedal is in the
N position, the Enable/Disable switch is in the
EUTRAL
D position, and the Lower Mow/Raise control is in
ISABLE
the N position. In addition, the engine should shut
EUTRAL
off when you press the traction pedal with the operator off
the seat or if the parking brake is left engaged.
CAUTION
If safety interlock switches are disconnected or
damaged the machine could operate unexpectedly,
causing personal injury.
• Do not tamper with the interlock switches.
• Check the operation of the interlock switches
daily and replace any damaged switches before
operating the machine.
Verifying the Interlock Switch Function
1. Park the machine on a level surface, lower the cutting
units, shut off the engine, and set the parking brake.
2. Remove the cover from the control panel.
3. Locate the wire harness and loop-back connector
(Figure 40).
30