Form No. 3417-740 Rev A
Horizon Control Module
For Z Master Lawn Mowers
Model No. 74946—Serial No. 402000000 and Up
Model No. 74947—Serial No. 40200000 and Up
Model No. 74969—Serial No. 400000000 and Up
Software Guide
Read this information carefully to learn how to operate and maintain your product properly and to avoid injury
and product damage. You are responsible for operating the product properly and safely. Read your Operator’s
Manual for more information.
WARNING
CALIFORNIA
Proposition 65 Warning
This product contains a chemical or chemicals known to the State of California
to cause cancer, birth defects, or reproductive harm.
Screen Icons
The information screen uses the following icons:
Low Engine Speed
Processing
Gauge and Meters
Advanced Settings
Battery Voltage
Transmission Oil Maintenance
Maintenance and Service
Engine-Oil Temperature
Engine Hours
Cancel/Exit
Fuel Level
© 2017—The Toro® Company
8111 Lyndale Avenue South
Bloomington, MN 55420
Engine Oil Maintenance
Register at www.Toro.com.
Original Instructions (EN)
Printed in the USA
All Rights Reserved *3417-740* A
No
PTO
Parking brake
Neutral Lock
*Located on bottom row of some
menu screens
Toggle Between Screens
Yes
Enter/Return
Decrease
Previous
Increase
Next
Play/Start
Reset
*Located in top row of Information Screen
OPC (Operator Presence Control)
Maximum Engine Speed
Efficient Engine Speed
Hydraulic-Fluid Temperature
Pause/Stop
Error Warning
Recommended Engine Cool Down Time
2
Shut Off Engine
LED Status Light
Product Overview
The LED status light is multi-colored to indicate the
system status and is located on the right side of the
panel. During startup, the LED illuminates red, then
orange, then green to verify functionality.
• Solid Green: indicates normal operating activity.
• Blinking Red: indicates that a fault is active.
• Blinking Green and Orange: indicates that a
clutch reset is required.
Buttons
g229466
The multi-functional buttons are located at the bottom
of the panel. The icons displayed on the information
screen above the buttons indicate the current function.
The buttons allow you to select the engine speed and
navigate through system menus.
Figure 1
1. LDU (Logic Display Unit)
3. Alarm
2. MCU (Master Control Unit)
Alarm
If an error occurs, an error message displays, the LED
turns red, and the alarm sounds audibly as follows:
• A fast chirp sound indicates critical errors.
• A slow chirping sound indicates less critical errors,
such as required maintenance or service intervals.
Note: During startup, the alarm sounds briefly to
verify functionality.
Information Screens
The main information screens are as follows:
g228164
Figure 2
LDU (Logic Display Unit)
1. Screen
2. LED status light
•
Startup Screen (page 3)
•
Engine-Off Screen (page 4)
•
Engine-On Screen (page 4)
Startup Screen
3. Buttons
During startup, the screen displays a startup graphic
for 1 second, sounds the alarm, and illuminates the
LED, changing from red to orange to green.
Screen
The screen displays icons and information relative to
machine operation and is backlit for viewing in low light
situations. The screen is located above the buttons.
Refer to the Screen Icons (page 1) section for icon
descriptions.
3
Engine Screens
Engine Speed Mode
3 modes are available: LOW, EFFICIENT, and MAXIMUM.
Engine-Off Screen
• LOW: Low transport speed/Low idle for reducing
deck packing in wet mowing conditions.
When the key is on without the engine running, the
Engine-Off screen displays (Figure 3).
• EFFICIENT: Medium transport speed and maximum
fuel economy and normal mowing conditions.
• MAX: Maximum transport speed/High idle for
extreme mowing conditions.
The panel illuminates showing the current engine
speed mode (Low is selected in Figure 4).
Safety Interlock Status Indicators
g030172
These illuminate when each control is in the starting
position (i.e., PTO disengaged, parking brake
engaged, motion-control levers in the NEUTRAL-LOCK
position, and the operator is present).
Figure 3
1. Hours remaining until transmission fluid maintenance is
required
2. Battery voltage display
• The PTO must be disengaged, brake engaged,
3. Safety interlock status indicators
and motion-control levers out (NEUTRAL-LOCK
position) to start the engine. (You do not need to
be in the seat to start the engine.)
4. Fuel-level gauge (if fuel sender is available)
5. Screen toggles between hours remaining until engine oil
maintenance and non-resettable engine hour counter
Note: The starter cranks with the PTO switch in
the ON (pulled up) position; however, the system
disengages the PTO and a PTO reset error occurs.
Engaging the PTO requires you to reset the PTO
switch by turning it OFF (pushed down) and ON.
Engine-On Screen
When the engine is running, the Engine-On screen
displays (Figure 4).
• You must be in the seat while the PTO is engaged,
the parking brake must be disengaged, or the
motion-control levers must be moved inward;
otherwise, the engine shuts off.
• The engine shuts off if either the left, the right,
or both levers are moved from NEUTRAL-LOCK
position while the parking brake is engaged.
Note: Refer to the machine Operator’s Manual to
check the safety interlock system.
g030173
Engine Temperature
Figure 4
1. Engine speed mode
4. Engine speed
2. Safety interlock status
indicators
5. Fuel level gauge (if fuel
sender is available)
A bar graph displays the engine temperature. When
the temperature is high and approaching an overheat
condition, the bar graph flashes. When the engine
has overheated, the bar graph fills completely.
3. Engine temperature
Engine Speed
Displays the speed of the engine.
Fuel Level (if fuel sender is available)
The fuel level is shown on a bar display. An error
appears when the fuel level is low (approximately 1
gallon remaining in the tank).
4
Menu Selection Screen
The Menu Selection Screen displays when you place
the motion-control levers in the NEUTRAL-LOCK position
and press and hold the 2 outside LDU buttons.
g038651
Figure 6
1. Maintenance and Service
2. Gauges and Meters
4. Cancel/Exit
5. Toggle between screens
3. Advanced Settings
6. Enter/Return
Maintenance and Service Menu
You can scroll between the following screens in the
Maintenance and Service menu:
• Status of Inputs (page 5)
• Status of Outputs (page 6)
• Current Error Messages (page 6)
• Hydraulic Trans Oil (page 6)
• Engine Oil (page 7)
• Machine Information (page 7)
• Module Information (page 7)
g228165
Figure 5
1. Outside buttons
2. Menu selection screen
The Menu Selection Screen allows you to cycle
through the different menu options by pressing the
toggle button. When the desired menu option is
highlighted, press the enter button to select it.
Status of Inputs
This screen lists all of the inputs to the system and
highlights which is currently active. Inputs with
numerical values display the current value.
Note: All menu options are locked if the
motion-control levers are not in the NEUTRAL-LOCK
position.
Press and hold the 2 outside buttons to return to the
default screen.
The menu selection screen allows you to cycle
through the following screens.
•
Maintenance and Service Menu (page 5)
•
Gauges and Meters Menu (page 8)
•
g030183
Figure 7
Advanced Settings Menu (page 10)
1. Status of Inputs
5. Brake
2. PTO Switch
3. Neutral
6. Previous
7. Toggle between screens
4. Oil Pressure
8. Next
The following are a list of items available in the Status
of Inputs screen:
• System voltage
• Engine communication (highlights if module is
communicating with engine ECU)
• PTO switch (highlights if On)
5
• Fuel sender voltage (shows voltage)
• Neutral switch (highlights if On)
• Brake switch (highlights if On)
• Seat switch (highlights if On)
• Oil pressure switch (highlights if On)
• Engine temperature (shows temperature)
g030185
Figure 9
Status of Outputs
1. Current Error
2. Error display (e.g., Low Oil Pressure)
This screen lists all of the outputs from the system
and highlights which one is currently active. Outputs
with numerical values display the current value.
3. Engine hours when the error occurred
Hydraulic Trans Oil
This service reminder screen displays the hours until
the hydraulic transmission oil maintenance is due.
g038556
Figure 8
1. Status of Outputs
3. Clutch Output
2. Speed Signal
4. Engine Power to Run
g030186
Figure 10
The following are a list of items available in the Status
of Inputs screen:
1. Hydraulic Trans Oil
2. Reminder display
• Engine speed signal shows voltage signal sent
3. Engine hours remaining until the service is due
from the system to the engine ECU (Engine
Control Unit).
• PTO output (highlights if On)
Press the toggle button to also display the engine
hours at which every service reminder reset was
performed.
• Engine shutdown output (highlights if On)
• Module communication (highlights if LDU and
MCU are communicating)
• Alarm (highlights if On)
• Starter (highlights if On)
Current Error Messages
This screen displays the current error as text with the
engine hours at which the error occurred. The toggle
button allows you to scroll between screens if multiple
errors are active. If only 1 error occurs, the toggle
button does not change screens.
g030187
Figure 11
1. Hydraulic Trans Oil
2. Service History display
3. Service reminder reset was performed (e.g., 250 and 750
engine hours)
6
Engine Oil
Machine Information
This service reminder screen displays the hours until
the engine oil maintenance is due.
The screen displays the serial number and model
number of the machine.
g030190
g030188
Figure 15
Figure 12
1. Machine Information
2. Model number
1. Engine Oil
2. Reminder display
3. Serial number
3. Engine hours remaining until the service is due
Module Information
Press the toggle button to also display the engine
hours at which every service reminder reset was
performed.
The screen displays the current installed version
of software and hardware for both the LDU (Logic
Display Unit) and the MCU (Master Control Unit).
Select the toggle button to see the MCU screen.
g030189
Figure 13
1. Engine oil
g030191
Figure 16
2. Service History display
3. Service reminder reset was performed (e.g., 250 and 750
engine hours)
1. Module Information
2. LDU
4. Software Version
5. Toggle
3. Hardware Version
Deck Gear Box Oil
Applicable Models Only
This screen displays the hours until the Deck Gear
Box Oil maintenance is due.
g030192
Figure 17
1. Module Information
2. MCU
3. Hardware Version
4. Software Version
g219156
Figure 14
To exit the screen, press the previous or next arrow
keys. Pressing the enter button takes you back to the
Menu Selection screen.
1. Deck Gear Box Oil
2. Reminder display
3. Engine hours remaining until the service is due
7
g030193
Figure 18
1. Exit
2. Exit Menu
g030203
Figure 20
3. Enter/Return
Gauges and Meters Menu
Engine Hours (page 8)
•
PTO Hours (page 8)
•
Fuel Used (page 8)
•
Fuel Economy (page 9)
•
Trip Statistics (page 9)
3. Y (yes)
2. Are you sure?
4. N (no)
PTO Hours
You can scroll between the following screens in the
Gauges and Meters menu:
•
1. Reset
This screen displays a non-resettable, total PTO hour
counter and a resettable trip PTO counter.
Engine Hours
g030204
Figure 21
This screen displays a non-resettable, total engine
hour counter and resettable trip counter.
1. PTO Hours
3. Trip hours
2. Total hours
4. Reset trip hours
To reset the Trip hour meter, highlight the Trip hour
meter and press the Reset button; to confirm the
reset, press Y (yes) or N (no) to cancel (Figure 20).
Fuel Used
g030202
This screen displays the total US gallons/liters of fuel
used from the last time it was reset. Press the reset
button to reset the fuel used counter.
Figure 19
1. Engine Hours
3. Trip hours
2. Total hours
4. Reset trip hours
To reset the Trip hour meter, highlight the Trip hour
meter and press the Reset button; to confirm the
reset, press Y (yes) or N (no) to cancel (Figure 20).
g038362
Figure 22
1. Fuel Used
2. Displays US gallons/liters
used
8
3. Reset
Fuel Economy
This screen displays the US gallons/liters of fuel used
per engine hour.
g038364
Figure 25
1. Trip Statistics 1
g038363
Figure 23
1. Fuel Economy
2. Displays engine hours
4. Displays US gallons/liters
of fuel
5. Play/Start
3. Displays PTO hours
6. Reset
2. Displays US gallons/liters
per hour
When a trip statistic is playing, the statistics are not
highlighted and the reset button is blacked out and
not available. Pressing the pause button stops the
collection of data.
Trip Statistics
There are 5 trip statistics screens to scroll though and
view.
g038365
Figure 26
g030207
Figure 24
1. Trip Statistics
1. Trip Statistics 4
2. View trip statistics
2. Displays engine hours
4. Displays US gallons/liters
of fuel
5. Pause/Stop
3. Displays PTO hours
Each screen features resettable counters for the
following parameters: Engine Hours, PTO Hours, and
total US gallons/liters of fuel used.
Press the toggle button on the Trip Statistics 5 screen
to go back to the main Trip Statistics screen.
You can pause or stop the collection of statistics
and play or start the collection of trip statistics.
For example, when Trip Statistics 1 is paused, the
statistics are highlighted and the reset button is
available. Pressing the reset button resets all 3
parameters. Pressing the play button starts data
collection.
9
Advanced Settings Menu
Pressing the reset button brings up a screen asking to
confirm the reset reminder.
When the advanced settings menu is selected, the
module prompts you for a 4 digit passcode. The
default digits on the display screen are 0 0 0 0.
Hydraulic Trans Oil
After performing the necessary maintenance, this
screen allows you to reset the number of hours until
the hydraulic transmission oil service is due.
g030221
Figure 27
1. Enter password
4. Enter/Return
2. Active digits
5. Decrease
g030246
Figure 29
3. Increase
3. Remaining hours until
service
4. Reset
1. Hydraulic Trans Oil
The passcode is 1 9 8 2. When the active digit is
highlighted, press the increase or decrease buttons to
scroll through digits from 0 to 9. Press enter to select
the highlighted digit.
2. Reminder display
Pressing the reset button brings up a screen asking to
confirm the reset reminder.
If the incorrect password is entered, the module
takes you back to the menu select screen. When the
correct password is entered, you can scroll between
the following screens:
• Engine Oil (page 10)
• Hydraulic Trans Oil (page 10)
• Historical Error (page 10)
• Alarms (page 11)
• Engine Settings (page 11)
• Calibrate Engine Settings (page 12)
• Factory Defaults (page 12)
Every time you reset the hydraulic transmission oil
service reminder, the module prompts you to select
whether the machine was serviced with Toro Premium
Hydraulic Oil. Pressing Y (yes) or N (no) determines
the correct maintenance schedule.
Historical Error
This screen displays errors that are no longer active.
The log keeps a running count of the number of times
the error has occurred during the life of the machine
and the engine hour at which the last occurred. The
log displays the errors starting with the most recent
occurrence.
Engine Oil
After performing the necessary maintenance, this
screen allows you to reset the number of hours until
the engine oil service is due.
g030224
Figure 30
1. Historical Error
3. Number of times the error
occurred during life of
machine (e.g., 3X)
2. Current error (e.g. Low Oil
Pressure)
4. Engine hour at which the
error last occurred
g030245
Figure 28
1. Engine Oil
2. Reminder display
3. Remaining hours until
service
4. Reset
10
Alarms
Engine Settings
The alarms screen allows you to activate and
deactivate the audible alarm for individual errors.
Press the Enter button to access individual error alarm
settings.
This screen allows you to adjust the engine speed
at the Maximum, Efficient, and Low set points for
both transport (clutch disengaged) and mow (clutch
engaged) modes in 50 rpm increments.
Note: Not all audible alarms can be deactivated.
g030227
Figure 33
g030225
1. Engine Settings
Figure 31
1. Alarms
2. Activate/Deactivate
3. Audible Alerts
4. Enter
2. Adjust Engine Speeds
Pressing the up arrow increases the engine speed
while pressing the down arrow decreases the engine
speed. Pressing the Enter button confirms the
speed and automatically moves you to the next
screen/engine speed set point.
The highlighted error name indicates that the audible
alarm is active. Pressing enter modifies the status of
the audible alarm to On or Off.
g030228
g038366
Figure 34
Figure 32
1. Alarms
4. Toggle
2. Clutch Overcurrent
3. Fuel Low
5. Enter
You can deactivate the audible warning for the
following errors:
•
•
•
•
•
•
•
•
•
•
•
1. Engine Settings
4. Up arrow—Increase
2. Set Low Mow Speed
5. Enter
3. Engine speed in rpm (e.g.
3600)
6. Down arrow—Decrease
The system does not allow the following to occur:
• The efficient speed cannot be set higher than the
Service Air Filter
maximum speed.
Service Engine Oil
• The low speed cannot be set higher than the
Service Transmission Oil
efficient speed.
Service Gear Box Oil (as applicable)
Note: You can set the maximum speed equal to the
Fuel Low
efficient mow speed to use the efficient mode while
mowing.
Clutch Overcurrent
Clutch Reset Required
Engine Error Codes
System Overvoltage>16VDC
System Undervoltage<9VDC
System Voltage Low
11
Calibrate Engine Settings
Factory Defaults
This screen allows the calibration of the actual engine
speed to match the commanded engine speed.
The enter button blacks out if the blades are not
disengaged, the parking brake is not engaged, and
the motion-control levers are not in the NEUTRAL-LOCK
position. Once they are, press the Enter button to
start the calibration process.
This screen allows you to reset system settings back
to the factory default settings. Pressing the Enter
button brings up confirmation screen; press Y (yes) to
reset or N (no) to cancel.
Note: Resetting the system returns the engine speed
settings and alarm settings back to the factory default
settings.
g030234
g030238
Figure 35
1. Calibrate Engine Settings
Figure 38
2. Start Calibration
1. Factory Defaults
An animated hourglass appears indicating the
calibration is in process.
2. Reset
When the exit screen appears, press the enter button
to go back to the Menu Selection screen.
Returning to the Default
Screen (Engine-On or
Engine-Off)
There are 3 ways to return to the default screen:
• Press the previous or next arrow keys until the
Exit screen appears then press the Enter button to
return to the Menu Selection screen.
• Turn the ignition key to the OFF position and
either restart the engine or turn the key to the ON
position.
• Press and hold the 2 outside buttons.
g030235
Figure 36
1. Calibrate Engine Speed
3. Processing
2. Calibrating
Once the calibration is complete, you can toggle back
to the primary Calibrate Engine Speed screen.
Setting Engine Speeds
At startup, the system defaults to the Low engine
speed. The icon on the information screen is
highlighted.
• Press the button below the Efficient Speed Mode
icon to increase the engine speed to the Efficient
engine speed.
g030237
The Efficient Speed Mode icon is highlighted.
Figure 37
1. Calibration Engine Speed
• Press the button below the Maximum Speed Mode
3. Toggle between screens
icon to increase the engine speed to the maximum
engine speed.
2. Calibration Complete
The Maximum Speed Mode icon is highlighted.
Note: If you engage the PTO switch at any speed
setting, the engine speed ncreases to the mow speed.
12
Adjusting the
Electronically-Controlled
Low Mode Speed
Adjustment
When operating in low mow mode, press and hold the
Low Speed Mode button reduce the engine speed
(minimum of 2250 rpm). Press the Low Speed Mode
button again to return the engine to the default setting.
Auto Idle Down Mode
•
If the operator leaves the seat and the safety interlocks
allow the engine to remain running, the system enters
the auto idle mode and automatically set the engine
speed to the low transport speed. When you return
to the seat, the system automatically returns to the
previously selected engine speed mode. If you select
another engine speed setting, the system exits the
auto idle mode and the engine runs at the selected
speed.
Error Messages
If an error occurs, a message displays in place of the
engine temperature, engine speed, and fuel level. In
addition to displaying the fault as text, the system
turns the LED red and sounds the audible alarm.
• The system is capable of displaying the following
errors:
– Service Air Filter: An air filter is required.
– Service Engine Oil: Engine oil maintenance
is required.
– Service Transmission Oil: Transmission oil
maintenance is required.
– Service Deck Gearbox Oil (as applicable):
Deck gearbox oil maintenance required.
– Low Oil Pressure: Low engine-oil pressure is
detected.
– Fuel Low: The fuel level is low.
– Engine Over Temperature: The engine over
temperature is detected.
– System Overvoltage>16VDC: The system
voltage is too high (greater than 16 V).
– System Undervoltage<9VDC: The system
voltage is too low (greater than 9 V).
– Clutch Overcurrent: The cutting clutch
current is too high.
•
– Clutch Reset Required: The PTO switch
must be turned off and to activate the PTO.
13
– Engine Error Codes: The system displays
engine error codes provided by the engine
manufacturer.
– Clutch Output Failure: The clutch output is
open or shorted.
– System Voltage Low: The voltage is too low
(less than 12.3 V).
– Engine Communication Error: The
communication between engine and module
was lost.
– Module Communication Error: The
ommunication between the LDU and MCU
modules was lost.
You can acknowledge and silence some of the
errors listed above. Move the motion-control
levers to the NEUTRAL-LOCK position and press
and hold the middle button.
Acknowledging an error removes the error
message from the engine temperature, engine
speed, or fuel level icon area and silence the
audible alarm. However, the error continues
to display on the active error screen in the
Maintenance and Service Menu and the status
LED continues to be illuminated red.
– The following errors emit a slow chirping sound
that you can acknowledge and silence:
◊ Service Engine Oil
◊ Service Transmission Oil
◊ Fuel Low
◊ Clutch Overcurrent
◊ Clutch Reset Required
◊ Engine Error Codes
◊ Anti-Stall Active
◊ Service Air Filter
◊ Service Deck Gear Box
– The following errors emit a fast chirping sound
and can be acknowledged and silenced:
◊ System Overvoltage>16VDC
◊ System Undervoltage<9VDC
– The following error codes emit a fast chirping
sound and cannot be acknowledged or
silenced.
◊ Low Oil Pressure
◊ Engine Over Temperature
◊ Engine Communication Error
◊ Module Communication Error
◊ Clutch Output Failure
◊ Engine Limp Mode Active
In order to protect the system components from
exceeding threshold limits, the system is designed
to limit the engine speed and/or disengage the
clutch, which allows the machine to be driven onto
a trailer or returned to a service area.
There are the following errors:
1.
Clutch Overcurrent
If an overcurrent event occurs, the system
limits the engine speed to the Efficient
Transport Mode speed and places the
machine in Safe Transport Mode. Safe
Transport Mode limits the engine speed,
locks out the PTO, and disengages the
clutch; a Clutch Overcurrent error message
will display. Cycling the key switch to the OFF
and then to the ON position clears the fault.
2.
System Overvoltage>16VDC
If the voltage exceeds 16 V, the system will
disengage the clutch and displays a System
Overvoltage>16VDC error message.
3.
System Undervoltage<9VDC
If the voltage is less than 9 V, the system
will not allow clutch engagement and display
the error System Undervoltage<9VDC. If
the clutch was engaged before the error
occurred, the system allows the clutch to
remain engaged; however, low voltage may
cause the clutch to disengage itself.
4.
Low Oil Pressure
If low engine-oil pressure is detected, the
system limits engine speed to the Efficient
Transport Mode speed and places the
machine in Safe Transport Mode. Safe
Transport Mode limits the engine speed,
locks out the PTO, and disengages the
clutch; a Low Oil Pressure message will
display. Cycling the key switch to the OFF
and then to the ON position clears the fault.
5.
Engine Over Temperature
When the engine begins to overheat, the
system flashes the engine temperature
bar graph and chirps the audible alarm.
If the temperature rises above the upper
limit, the system limits the engine speed
to the Efficient Transport Mode speed and
places the machine in Safe Transport Mode.
Safe Transport Mode limits the engine
speed, locks out the PTO, and disengages
the clutch; an Engine Over Temperature
message displays. The fault clears once the
temperature falls below a safe limit.
14
Troubleshooting
Issue Description
Recommended Corrective Action
Blink Red
Engine oil service is
due.
Replace the engine oil and filter.
Follow the reset procedure; refer to
Engine Oil (page 10).
Blink Red
Transmission oil
service is due.
Replace the transmission oil and
filter(s). Follow the reset procedure;
refer to Hydraulic Trans Oil (page 10).
Blink Red
Safe Transport
Mode—engine limited
to Efficient mode and the
PTO is disengaged.
Engine oil pressure is
below limit.
Cycle the key switch to clear the
fault. Check the oil level. Contact an
Authorized Service Dealer.
Green
Single alarm chirp and
temperature display
flashes.
Engine temperature is
high.
Check the oil level. Clean debris from
the engine. Inspect the engine fan.
Contact an Authorized Service Dealer.
Engine Over
Temperature
Blink Red
Safe Transport
Mode—engine limited
to Efficient mode and the
PTO is disengaged.
Engine temperature
above limit.
Check the oil level. Clean debris from
the engine. Inspect the engine fan.
Contact an Authorized Service Dealer.
Fuel Low
Blink Red
Fuel level low.
Check the fuel level and add fuel as
necessary.
System Overvoltage
>16VDC
Blink Red
System voltage
excessive/ above
16 V.
Check the battery and engine
charging system. Contact an
Authorized Service Dealer.
System Voltage Low
Blink Red
System voltage below
12.3 V.
Check the battery and engine
charging system. Contact an
Authorized Service Dealer.
System Under
voltage<9VDC
Blink Red
Disallow clutch
engagement/ Disengage
clutch.
System voltage below
lower limit of 9 V.
Check the battery and engine
charging system. Contact an
Authorized Service Dealer.
Clutch Overcurrent
Blink Red
Safe Transport
Mode—engine limited
to Efficient mode and the
PTO is disengaged.
Clutch current is
above limit.
Cycle the key switch to clear the
fault. Check the PTO clutch condition
and the related wiring. Contact an
Authorized Service Dealer.
The PTO switch is
in the up/ engaged
position and the
module has latched
the clutch output Off.
Cycle the PTO switch to the OFF
position and back to the ON position
to engage the clutch.
System Error Message
Status LED
Service the Engine Oil
Service the
Transmission Oil
Low Oil Pressure
Clutch Reset Required
System Actions
Disallow clutch
engagement/ Disengage
the clutch.
Alternating
green/orange
Clutch Output Fault
Blink Red
Clutch output short or
open.
If the clutch is stuck in the ON position,
discontinue use and contact an
Authorized Service Dealer. Check
the clutch connection and associated
wiring for an open circuit.
Engine MIL Errors
Blink Red
Engine ECU has
detected a fault.
See the engine owner’s manual for the
error description and troubleshooting
information.
15
System Error Message
Engine
Communication Error
Module
Communication Error
Status LED
System Actions
Blink Red
Blink Red
Safe Transport
Mode—engine limited
to Efficient mode and the
PTO is disengaged.
16
Issue Description
Recommended Corrective Action
Communication
between the module
and the engine ECU
has been lost.
Check the electrical connections at
the module, interconnect between
the engine wire harness, and chassis
harness. Check the connections
at the engine ECU. Contact an
Authorized Service Dealer.
Communication
between the LDU
module and MCU
module has been lost.
Check the electrical connections at
the LDU and MCU module.