are designed to allo w assembly only when the
tw o halv es of the shaft are properly oriented.
Understanding the
Diagnostic Light
T he mac hine is equipped with a diagnostic light
whic h indicates if the electronic controller is
functioning cor rectly . T he g reen diagnostic light
is located under the control panel, next to the
fuse bloc k ( Figure 37 ). W hen the electronic
controller is functioning cor rectly and the k ey
switc h is mo v ed to the On position, the controller
diagnostic light will be illuminated. T he light will
blink if the controller detects a malfunction in the
electrical system. T he light will stop blinking and
automatically reset when the k ey switc h is tur ned
to the Off position.
Figure 37
1. Diagnostic light
W hen the controller diagnostic light blinks , one of
the follo wing problems has been detected b y the
controller :
• One of the outputs has been shor ted.
• One of the outputs is open circuited.
Using the diagnostic displa y , deter mine whic h
output is malfunctioning; refer to Chec king the
Interloc k Switc hes .
If the diagnostic light is not illuminated when the
k ey switc h is in the On position, this indicates that
the electronic controller is not operating . P ossible
causes are as follo ws:
• Loop-bac k is not connected.
• T he light is bur ned out.
• Fuses are blo wn.
• It is not functioning cor rectly .
Chec k the electrical connections , input fuses , and
diagnostic light bulb to deter mine the malfunction.
Ensure that the loop-bac k connector is secured to
the wire har ness connector .
Diagnostic Ace Display
T he mac hine is equipped with an electronic
controller whic h controls most mac hine functions .
T he controller deter mines what function is
required for v arious input switc hes (i.e . seat
switc h, k ey switc h, etc .) and tur ns on the outputs
to actuate solenoids or rela ys for the requested
mac hine function.
F or the electronic controller to control the
mac hine as desired, eac h of the input switc hes ,
output solenoids , and rela ys m ust be connected
and functioning properly .
Use the Diagnostic A CE displa y to help v erify and
cor rect electrical functions of the mac hine .
Checking the Interlock
Switches
T he pur pose of the interloc k switc hes are to
prev ent the engine from cranking or star ting
unless the traction pedal is in the Neutral position,
the Enable/Disable switc h is in the Disable
position, and the Lo w er Mo w/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.
34
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