Note: T he Diagnostic A CE also has the ability to
detect whic h output solenoids or rela ys are tur ned
on. T his is a quic k w a y to deter mine if a mac hine
malfunction is electrical or h y draulic .
Verifying Output Function
1. P ark the mac hine on a lev el surface , lo w er the
cutting units , stop the engine , and eng ag e the
parking brak e .
2. Open control panel co v er .
3. Locate wire har ness and connectors near
controller .
4. Carefully unplug loopbac k connector from
har ness connector .
5. Connect the Diagnostic A CE connector to the
har ness connector .
Note: Mak e sure cor rect o v erla y decal is
positioned on Diagnostic A CE.
6. T ur n the k ey switc h to the ON position, but
do not star t mac hine .
Note: T he red text on the o v erla y decal refers
to input switc hes and the g reen text refers to
outputs .
7. T he “outputs displa yed” LED , on lo w er
right column of Diagnostic A CE, should be
illuminated. If the “inputs displa yed” LED
is illuminated, press the tog gle button, on
the Diagnostic A CE, to c hang e the LED to
“outputs displa yed”.
Note: It ma y be necessar y to tog gle betw een
“inputs displa yed” and “outputs displa yed”
sev eral times to do the follo wing ste p . T o
tog gle bac k and for th, press the tog gle button
once . T his ma y be done as often as required.
Do not hold the button.
8. Sit on the seat and attempt to operate the
desired function of the mac hine . (If y ou
need help v erifying the cor rect input settings
for eac h function, refer to Figure 40 ). T he
appropriate output LEDs should illuminate
to indicate that the ECU is tur ning on that
function. (R efer to the logic c har t ( Figure 40 )
to be cer tain of the specified output LEDs .
Note: If any output LED is blinking, this
indicates an electrical problem with that OUTPUT .
R e pair or re place defecti v e electrical par ts
immediately . T o reset a blinking LED , tur n the
k ey switc h the Off position, then bac k to the On
position.
If no output LEDs are blinking, but the cor rect
output LEDs do not illuminate , v erify that the
required input switc hes are in the necessar y
positions to allo w that function to occur . V erify
cor rect switc h function.
If the output LEDs are on as specified, but the
mac hine does not function properly , this indicates
a non-electrical problem. R e pair as necessar y .
Note: Due to electrical system constraints ,
the output LEDs for “ST AR T”, “PREHEA T”,
and “ETR/AL T” ma y not blink ev en though an
electrical problem ma y exist for those functions . If
the mac hine problem appears to be with one of
these functions , be cer tain to c hec k the electrical
circuit with a v olt/ohm meter to v erify that no
electrical problem exists to these functions .
If eac h output switc h is in the cor rect position
and functioning cor rectly , but the output LEDs
are not cor rectly illuminated, this indicates an
ECU problem. If this occurs , contact y our T oro
Distributor for assistance .
Important: T he Dia gnostic ACE display
must not be left connected to the machine. It
is not designed to withstand the en vir onment
of the machine’ s ev er y day use. W hen done
using the Dia gnostic ACE, disconnect it fr om
the machine and connect loop-back connector
to har ness connector . T he machine will not
operate without loopback connector installed
on the har ness. Stor e the Dia gnostic ACE in
dr y , secur e location in the shop , not on the
machine.
36
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