Engine Diagnostics - Toro Workman HDX Service Manual

Engine Diagnostics

Check Engine Light
The Workman HDX is equipped with a check engine
light that indicates if the engine electronic controller is
functioning correctly. The check engine light is located
on the dash panel (Fig. 4).
When the ignition switch is moved to the ON position
and the engine electronic controller is functioning pro-
perly, the check engine light will be illuminated for
approximately three (3) seconds and then will turn off.
The light should remain off during normal vehicle opera-
tion.
During vehicle operation if a problem occurs with the en-
gine management system, the check engine light on the
dash panel will illuminate. If possible, allow engine to
continue running to prevent the controller from resetting
should the engine be stopped. A component failure
code can be retrieved to identify the engine component
that has caused the check engine light to illuminate.
Retrieving Component Failure Codes
To retrieve a component failure code when the check
engine light is illuminated, follow the following steps:
1. Make sure that the shift lever is in neutral and the
parking brake is applied. Raise and support bed.
2. Locate termination cap that connects the two (2) ser-
vice shunt wires located near engine controller (Fig. 5).
3. Remove termination cap from service shunt wires
and connect the two (2) shunt leads together.
4. Monitor the check engine light on the dash panel to
determine the two (2) digit component failure code that
will be displayed by the flashing check engine light.
A. The first digit will be shown with from 0 to 9 light
flashes followed by the second digit shown with from
0 to 9 shorter light flashes. After the second digit is
displayed, there will be a pause before the failure
code is repeated.
B. If more than one failure exists, all failure codes
will be displayed before the failure codes repeat.
C. The check engine light will continue to display the
failure code(s) until either the ignition switch is turned
to OFF or the service shunt leads are disconnected.
Failure codes are shown on the following page.
Briggs/Daihatsu Gasoline Engine
5. After necessary service has been performed, dis-
connect service shunt leads and insert shunt leads into
termination cap.
6. Remove bed support and lower bed.
NOTE: If a component problem exists when engine is
initially started, the check engine light will stay illumi-
nated to identify the problem. In some instances, how-
ever, a recurring component problem might not be
detected until after the engine has been run for some
time.
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1. Gauge cluster
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1. Service shunt wires
2. Engine controller
Page 3 - - 6
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Figure 4
2. Check engine light
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Figure 5
3. RH frame rail
Workman HDX
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