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

6. Tighten the screw and turn the ignition key to
O .
FF
Note:
Normally the engine should start after the
above bleeding procedures are followed. However, if
the engine does not start, air may be trapped between
the injection pump and injectors; refer to
from the Injectors (page
Understanding the
Diagnostic Light
The machine is equipped with a diagnostic light
that indicates if the electronic controller senses an
electronic malfunction. The diagnostic light is located
on the control panel (Figure
controller is functioning correctly and you move the
key switch to the O position, the controller diagnostic
N
light turns on for 3 seconds and turn off to indicate
that the light is working properly. If the engine shuts
off, then the light turns on steady until the you change
key position. The light blinks if the controller detects a
malfunction in the electrical system. The light stops
blinking and automatically resets when you turn the
key switch to the O position once the fault has been
FF
resolved.
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
Switches (page 30).
If the diagnostic light is not illuminated when the key
switch is in the O position, this indicates that the
N
electronic controller is not operating. Possible causes
are as follows:
•
The loop-back is not connected.
•
The light is burned out.
Bleeding Air
44).
35). When the electronic
Figure 35
Checking the Interlock
•
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
switch is in the D
Mow/Raise control is in the N
addition, the engine should shut off when you press
g020251
the traction pedal with no one in the seat or if the
parking brake is 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, engage the parking brake, and
shut off the engine.
30
position, the Enable/Disable
EUTRAL
position, and the Lower
ISABLE
position. In
EUTRAL