AL-KO TOW ASSIST User manual

YEARS
WARRANTY
YEARS
WARRANTY
YEAR WARRANTY ON SUSPENSION COMPONENTS
TESTED |PROVEN |CONFIDENCE
YEAR WARRANTY ON SUSPENSION COMPONENTS
TESTED |PROVEN |CONFIDENCE
YEAR WARRANTY ON SUSPENSION COMPONENTS
TESTED |PROVEN |CONFIDENCE
YEAR WARRANTY ON SUSPENSION COMPONENTS
TESTED |PROVEN |CONFIDENCE
YEARS
WARRANTY
YEAR WARRANTY ON SUSPENSION COMPONENTS
TESTED |PROVEN |CONFIDENCE
YEAR
WARRANTY
1
YEARS
WARRANTY
2
YEARS
WARRANTY
3
YEARS
WARRANTY
4
YEARS
WARRANTY
5
YEARS
WARRANTY
5
YEAR WARRANTY ON SUSPENSION COMPONENTS
TESTED |PROVEN |CONFIDENCE
AL-KO WARRANTY
TESTED | PROVEN | CONFIDENCE
YEARS
WARRANTY
5
YEARS
WARRANTY
5
WARRANTY
TESTED | PROVEN | CONFIDENCE
WARRANTY
TESTED | PROVEN | CONFIDENCE
AS STANDARDNO UPGRADE REQUIRED
YEARS
WARRANTY
5WARRANTY
TESTED | PROVEN | CONFIDENCE
NO UPGRADE REQUIRED
YEARS
WARRANTY
5WARRANTY
TESTED | PROVEN | CONFIDENCE
NO UPGRADE REQUIRED
TOW ASSIST
ABS & Sway Mitigation System
OWNER’S MANUAL
WARNING
Read this manual before
operating this product.
RETAIN THIS MANUAL.
ANTI-LOCK
BRAKING
TRAILER SWAY
MITIGATION
TOWABLE
ODOMETER
EVASIVE
ACTION
CONTROL
ANTI-LOCK
BRAKING
TRAILER SWAY
MITIGATION
TOWABLE
ODOMETER
EVASIVE
ACTION
CONTROL
EVASIVE
ACTION
CONTROL
EVASIVE
ACTION
CONTROL
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Tow Assist User Manual

INTRODUCTION .................................................................................. 2
Anti-Lock Braking System (ABS)..................................................................................... 2
Trailer Sway Mitigation (TSM.......................................................................................... 2
Evasive Action Control (EAC).......................................................................................... 2
Trailer Brake Monitoring ................................................................................................ 2
Trailer Odometer Feature ............................................................................................... 2
Conguration .............................................................................................................. 2
OPERATION ....................................................................................... 3
Initialization ............................................................................................................... 3
Shutdown/Sleep .......................................................................................................... 4
BRAKE SYSTEM MONITORING ................................................................... 4
Brake Magnets ............................................................................................................ 4
Wheel Speed Sensors .................................................................................................. 4
Power Supply ............................................................................................................. 4
TOW ASSIST APP ................................................................................. 5
TOW ASSIST COMPATIBILITY GUIDELINES ...................................................... 5
TROUBLESHOOTING .............................................................................. 6
Fault Diagnosis: Diagnostic Interface Method ................................................................... 6
Fault Diagnosis: Light Flash Method ............................................................................... 6
SERVICE INSTRUCTIONS ......................................................................... 7
REFERENCE ....................................................................................... 8
Light Module Operations .............................................................................................. 8
Service Diagnostic Action .............................................................................................. 10
LIMITED WARRANTY ............................................................................. 13
..
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INTRODUCTION
The AL-KO Tow Assist™ system brings
automotive intelligence and technology to the
trailer industry by providing Anti-Lock Braking
(ABS), Sway Mitigation, Emergency Action
Control (EAC) and a towable odometer. The
product will make trailer driving safer for both
novice and professional drivers while also
helping to reduce the costs associated with
trailer downtime.
Anti-Lock Braking System (ABS)
Anti-lock Braking System (ABS) will operate
when one or more wheels are determined
to be slipping to a level to require ABS
intervention. The main goal of the trailer
ABS feature is to maintain lateral stability
of the trailer on a surface where the trailer
wheels become locked (typically lower friction
surfaces, wet asphalt, gravel, snow, ice).
ABS ensures the braking system can
achieve maximum braking power without
the associated risk of locked wheel trailer
instability. ABS is the foundation of a safe
braking system.
Trailer Sway Mitigation (TSM)
Trailer sway is increasing oscillations of a
trailer swaying due to incorrectly loaded
trailers (incorrect loading should always be
corrected by the operator) or external forces
such as high winds, road conditions or
extreme driver steering. TSM function will only
activate at speeds 65 kph and above.
TSM improves safety by using advanced
monitoring and braking algorithms to ensure
the trailer assists with the most effective
level for the sway rate, road surface, brake
efciency and trailer weight. Paired with ABS,
trailer sway mitigation is extremely effective
in adapting to all trailers irrespective of the
weight, loading, braking efciency or wheel &
tire choice.
Evasive Action Control (EAC)
Evasive action instability differs from trailer
sway. EAC is activated by a sudden change
in the tow vehicle’s direction rather than an
increasing the sway of the trailer while the
vehicle is traveling straight. The Tow Assist
Evasive Action Control (EAC) monitors for
sudden vehicle swerving and extreme trailer
movement to stabilize the trailer early.
Trailer Brake Monitoring
Drivers know they can rely on Tow Assist;
it is a safety system that continually
monitors components and provides up
to date notication through the indicator
light. For this reason, the customer benets
from a monitoring system. Monitoring of
trailer components includes electrical brake
mechanisms, wheel speed sensors, power
source monitoring and trailer braking issues.
Trailer Odometer Feature
Tow Assist offers the feature of recording
trailer mileage. Trailer mileage tracking plays
an important role in ensuring trailers are
serviced at correct intervals, improving safety.
Additionally, it can improve the resale value
of trailers by offering the buyer the trailer
mileage and service history.
Conguration
The installer of your Tow Assist system
congured it to your specic trailer with the
number of axles and tire size from original
delivery. Signicant changes in the size may
slightly affect odometer accuracy.
! CAUTION
Alterations from original delivery may
require reprogramming of the Tow Assist
module. Seek consultation from your dealer
or installer before operating if modications
are made.
2Tow Assist User Manual

OPERATION
The Tow Assist system works in collaboration
with an approved in-vehicle Electric Trailer
Brake Controller to improve the safety and
stability of trailer braking. See pg 5 for more
information about approved controllers.
The primary trailer braking control remains
the responsibility of the Electric Brake
Controller and the vehicle driver. Tow Assist
will intervene when it determines the safety of
braking is compromised and the system can
improve the situation.
The goal of the Tow Assist system is to
improve the safety of the trailer braking and
stability, while also ensuring trailer braking
efciency or reliability is not reduced.
The Tow Assist system sources operational
power from an on board battery. However can
have power supplied from the tow vehicle.
This will require an additional connection and
adequate power.
Depending on the number of axles the power
requirements varies.
1 Braking Axle
requires 12.0V 10A (for min 30 seconds)
2 Braking Axles
requires 12.0V 18A (for min 30 seconds)
3 braking Axles
requires 12.0V 26A (for min 30 seconds)
Initialisation
The Tow Assist will startup when:
Woken from low power deep sleep mode, or
Power is rst applied from the tow vehicle
power supply.
During Tow Assist startup, audible clicking
may be heard from the Tow Assist ECU
performing a self-check. The light will ash
briey as part of the self-check.
After startup, the Tow Assist light will remain
off until a valid brake signal is detected. A
brake signal generated by the driver pressing
the brake pedal or pressing the brake override
lever of the electric trailer brake control. By
waiting for this signal, Tow Assist ensures it
has detected a valid trailer braking signal and
that the driver has correctly connected the tow
vehicle to the trailer.
Brake controllers will vary somewhat on the
exact signal produced while at a standstill.
Tow Assist requires a strong brake controller
signal to wake-up the unit. Available brake
controllers vary on actual output created from
each controller setting. It is recommended to
set the controller gain setting of “2” or higher
to ensure there is enough signal created
to wake-up the Tow Assist. The Tow Assist
indicator light will illuminate, indicating the
system is on. If Tow Assist does not go into
normal operation, do the following until the
system indicator light is green:
|Press and hold the brake pedal for at least
2 seconds.
|Press and hold the brake override switch
for at least 2 seconds.
|Increase the gain setting slightly.
|If Tow Assist does not become active,
check trailer plug connections, wire and
power supply to the Tow Assist and repeat
the steps above.
Tow Assist will wake-up from a sleep state
when power and a valid signal is detected
from the brake input.
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Normal operation will commence when a
brake signal is detected by the system. The
system status will also be displayed on the
light module.
|Green operational light display only
indicates the system is good and
completely operational.
|Amber warning light display only indicates
the system has a fault and is shutdown.
It will not operate in this state. Note that
regular braking is still available. Use your
Tow Assist app, alternatively contact your
dealer or installer to have this corrected.
|Operational and warning light displays on
together (green and amber) indicates the
system is operating in a reduced state due
to a detected fault. Some level of ABS and
Sway Mitigation is available. Use your Tow
Assist app, alternatively contact your dealer
or installer to have this corrected.
A detailed list of light states is listed in
the reference section under light Module
Operations see page 8.
Shutdown/Sleep
Tow Assist will turn off the light module
illumination after 20 minutes of trailer
standstill without a braking signal detected.
Tow Assist will go into low power sleep mode
after 120 minutes of trailer standstill without a
braking signal detected.
Note: Anytime the light module is not
illuminated, the driver must assume the Tow
Assist is off and not operational.
Fault Monitoring
Tow Assist will perform periodic system status
checks. On start-up, the system will perform
a detailed review of the system and the
connected braking components.
While operating, Tow Assist is constantly
monitoring and reviewing the failure status of
the ECU and supporting components.
If the Tow Assist has an active fault, the
system will continue to perform fault checks
once at a standstill. Periodic checks are a
sequence of 5 minutes after standstill, then at
15 minutes after standstill and then every 30
minutes until such time the fault is corrected
and no longer.
BRAKE SYSTEM
MONITORING
Brake Magnets
Brake Magnets are monitored for a range
of faults including open circuit on magnet
connection, shorts to Ground Level, shorts to
Positive Battery Level, and incorrect wiring
detected on the brake magnets. These checks
are performed at Tow Assist start-up and
during active Tow Assist operation (ABS, TSM,
EAC).
Wheel Speed Sensors
Wheel Speed Sensors are checked for a
range of faults including wheel speed signal
and supply faults, tone wheel damage and a
range of plausibility checks between different
wheels.
Power Supply
Tow Assist Power Supply is checked for
conditions in standby and active operation
including:
|Under voltage when Tow Assist not actively
braking
|Under voltage levels when actively braking
|Over voltage level
4Tow Assist User Manual

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TOW ASSIST
COMPATIBILITY
GUIDELINES
! CAUTION
It is the responsibility of the end user to
ensure that their Electric Brake Controller
is compatible with the Tow Assist System.
AL-KO attempts to provide compatibility
with most controllers available but is unable
to anticipate design changes that might
be introduced by the various controller
manufacturers.
Information on compatible Electric Brake
Controllers for use with the Tow Assist system
is available on the AL-KO website.
TOW ASSIST APP
The Tow Assist App is available for smart
devices through the Dexter App.
Scan below to download the app
The Dexter app has a dedicated section for the
Tow Assist system. The app is avaliable in the
google Play sore or the Apple App Store.
The Tow Assist interface portion of the app
allows users to
|Create and manage account
|Manage multiple trailers
|Read trailer odometer
|Diagnose and learn about system faults
|Save information about readings and faults
|Reset the Tow Assist Controller (ECU)
The Tow Assist portion of the phone app
requires the support of the supplied Bluetooth
communication adapter to communicate with
the Tow Assist System. The Bluetooth adapter
comes pre installed in your system located
in the OBD2 connector. Remove the adapter
when not in use to protect from environmental
extremes.
Please note that the app is only intended to
read information from the Tow Assist ECU
only.
The OBD2 connector
The Bluetooth adapter
Scan below to view Tow Assist
compatible controllers guidance.
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6Tow Assist User Manual
TROUBLESHOOTING
A correctly installed and fully operational Tow
Assist will display an operation light (green)
on and warning light (amber) off.
If the system detects a fault, the warning light
will be on. Perform the following steps:
1. Wait for more than 5 minutes at standstill
or power cycle the Tow Assist ECU. The
Tow Assist ECU will perform a self-check.
2. If the warning light remains on after
5 minutes at a standstill or power
cycle, carefully drive off and stop again
(generating a brake signal by pressing the
brake pedal or pressing the brake override
lever of the electric trailer brake control).
3. If the warning light remains on, perform
fault diagnosis in one of the next two
sections.
Fault Diagnosis: Diagnostic Interface Method
The Tow Assist App contains a diagnostic
code log that provides the cause and repair
for each fault. The full description of the
possible diagnostic codes is listed in the
reference section in this manual. To extract the
diagnostic fault codes from the Tow Assist, the
user can use OBD2 Bluetooth® dongle and
the Tow Assist App.
Fault Diagnosis: Light Flash Method
An alternative basic troubleshooting method
is available, however, it will not offer the
same high level of troubleshooting detail that
a connection to the diagnostic interface will.
Diagnostic fault codes are mapped to Light
Flash Codes which can be accessed by the
installer, service representative and the user.
To activate the light Fault Display Mode the
following actions must be performed:
1. The trailer must be stationary, electric
brake controller connected and the Tow
Assist powered on.
2. The electric brake controller gain should
be greater than 50% of its scale.
3. The driver must not press the brake
pedal.
4. The driver must Apply (short press) the
manual override switch on the electric
brake controller with 10 short pulses
within a 15 second period to commence
the Fault Display Mode.
If these requirements are met then the Tow
Assist will ash the fault codes as per the table
in the reference section under light Module
Diagnostics.
Fault code ashing sequence will operate in
the following manner:
1. Fault Code (First Fault) (e.g. fault number
25)
2. Flash Warning light (amber) number of
times as the 1st digit. (e.g. 2 ashes)
3. Flash Operation light (green) number of
times as the 2nd digit. (e.g. 5 ashes)
4. All light off for 1 second (signies 1st
fault nished and will start 2nd fault)
5. Fault Code (Second Fault) (e.g. fault
number 45)
6. Flash Warning light (amber) number of
times as the 1st digit. (e.g. 4 ashes)
7. Flash Operation light (green) number of
times as the 2nd digit. (e.g. 5 ashes)
8. All light off for 1 second (signies 2nd
fault nished and will start next fault)
9. Fault Code (maximum 10 available)
All light off for 3 seconds (signies all faults
nished and will start the sequence again).
The entire ashing sequence will repeat for
10 cycles before returning to normal light
operation.
The light Fault Display Mode will cancel and
return to standard light operation if the trailer
is towed at any time or if power is removed
from the Tow Assist controller.

SERVICE INSTRUCTIONS
Repairs and Service to the Tow Assist system must be carried out by an AL-KO authorised technician.
Brake
Magnet
Service
Instructions
Check/Inspect
1. Inspect condition of brake magnet for damage or incorrect installation.
2. Inspect condition of brake magnet cable shielding and wire.
3. Check the brake Magnet is correctly connected/plugged into wiring harness.
4. Inspect condition of wiring from magnet connection to ECU for damage.
5. Check ground connection of brake magnet return wire. (Must have a common
ground with ECU).
Repair/Resolve Actions
1. Damaged wiring harness should be replaced or repaired correctly. Contact
your dealer or installer for questions about Tow Assist parts or service.
2. Brake magnet should be replaced or installation corrected if fault persists.
3. If fault persists once brake magnet replaced and harness is conrmed,
contact your dealer or installer for assistance.
Wheel
Speed
Sensor
Service
Instructions
Check/Inspect
1. Inspect condition of wheel speed sensor for damage or incorrect instillation.
2. Check the wheel speed sensor is mounted securely.
3. Inspect condition of tone wheel for damage or missing teeth.
4. Check tolerance between tone wheel and wheel speed sensor.
5. Check if wheel speed sensor is correctly plugged into wiring harness.
6. Inspect condition of wiring from wheel speed sensor to ECU for damage.
Repair/Resolve Actions
1. Damaged wiring harness should be replaced or repaired correctly. Contact
your dealer or installer for questions about Tow Assist parts or service.
2. Wheel speed sensor should be replaced or installation corrected.
3. Hub Drum should be replaced or repaired if damage is found.
4. If fault persists once wheel speed sensor replaced and harness is conrmed,
contact your dealer or installer for assistance.
Power
Supply
Service
Instructions
Check/Inspect
1. Check power supply voltage while charging.
2. Check power supply voltage when not being charged.
3. Check wiring and connection between the power supply and the ECU
Repair/Resolve Actions
1. Charge power supply to a good service level and check power supply
response under heavy braking (100% Manual Override).
2. Ensure all power connections are of sufcient power capacity.
3. Ensure power supply is rates sufciently to support all power load on trailer.
4. Replace power supply with new batteries if unable to maintain suitable power
supply level.
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Light State System Status Possible Causes Driver Action
All light Off ECU Powered Off/ Sleep/ No Brake
Signal
System has no power or has
gone into sleep mode.
Conrm connect of power to system, press brake pedal, press
brake controller manual override.
Operations light On Low Intensity
Warning light Off
Full System Available
(Pass-through Braking)
System is in full operation
and brake signal has been
detected.
No action necessary by driver.
Operations light On High Intensity
Warning light Off
Full System Available System is in full operation and
ABS, TSM, or EAC control is
operating.
No action necessary by driver. The high intensity light will return to
low intensity about 3 seconds after a ABS or sway event concludes
Operations light On Low Intensity
Warning light On
Reduced System Available
(Passthrough Braking)
System fault has occurred
and the system can only
offer reduced ABS, TSM, EAC
control
Expect reduced operation from the system and adjust their driving/
braking accordingly. Stop for 5 minutes, then carefully drive off
and stop again. The system will then preform a self-check. If the
warning light remains on, see troubleshooting.
Operations light On High Intensity
Warning light On
Reduced System Available
(ABS / TSM / EAC active)
System is in reduced operation
and ABS, TSM, or EAC control
is operating
Expect reduced operation from the system and adjust their driving/
braking accordingly. Stop for 5 minutes, then carefully drive off
and stop again. The system will then preform a self-check. If the
warning light remains on, see troubleshooting.
Operations light Off
Warning light On
System NOT Available (No
Operation)
System fault has occurred and
the system cannot offer any
control (ABS, TSM, EAC).
Expect no operation from the system and adjust their driving/
braking accordingly. Stop for 5 minutes, then carefully drive off
and stop again. The system will then preform a self-check. If the
warning light remains on, see troubleshooting.
Operations light Intermittent
Warning light On
Operation light Failed
(System Available)
System is in full operation,
however the green light has
detected as faulty
System status can’t be reliably reported to driver. Driver should
expect no operation from the system and adjust their driving/
braking accordingly. Stop for 5 minutes, allowing the system to
preform a selfcheck. Read fault codes through the App. Repair or
replace light module.
Operations light Off
Warning light Intermittent
Warning light Failed
(System Available)
System is in full operation,
however the amber light has
been detected faulty
System status can’t be reliably reported to driver. Driver should
expect no operation from the system and adjust their driving/
braking accordingly. Stop for 5 minutes, allowing the system to
preform a selfcheck. Read fault codes through the App. Repair or
replace light module.
REFERENCE
Light Module Operations
8Tow Assist User Manual

Light State System Status Possible Causes Driver Action
All light Off ECU Powered Off/ Sleep/ No Brake
Signal
System has no power or has
gone into sleep mode.
Conrm connect of power to system, press brake pedal, press
brake controller manual override.
Operations light On Low Intensity
Warning light Off
Full System Available
(Pass-through Braking)
System is in full operation
and brake signal has been
detected.
No action necessary by driver.
Operations light On High Intensity
Warning light Off
Full System Available System is in full operation and
ABS, TSM, or EAC control is
operating.
No action necessary by driver. The high intensity light will return to
low intensity about 3 seconds after a ABS or sway event concludes
Operations light On Low Intensity
Warning light On
Reduced System Available
(Passthrough Braking)
System fault has occurred
and the system can only
offer reduced ABS, TSM, EAC
control
Expect reduced operation from the system and adjust their driving/
braking accordingly. Stop for 5 minutes, then carefully drive off
and stop again. The system will then preform a self-check. If the
warning light remains on, see troubleshooting.
Operations light On High Intensity
Warning light On
Reduced System Available
(ABS / TSM / EAC active)
System is in reduced operation
and ABS, TSM, or EAC control
is operating
Expect reduced operation from the system and adjust their driving/
braking accordingly. Stop for 5 minutes, then carefully drive off
and stop again. The system will then preform a self-check. If the
warning light remains on, see troubleshooting.
Operations light Off
Warning light On
System NOT Available (No
Operation)
System fault has occurred and
the system cannot offer any
control (ABS, TSM, EAC).
Expect no operation from the system and adjust their driving/
braking accordingly. Stop for 5 minutes, then carefully drive off
and stop again. The system will then preform a self-check. If the
warning light remains on, see troubleshooting.
Operations light Intermittent
Warning light On
Operation light Failed
(System Available)
System is in full operation,
however the green light has
detected as faulty
System status can’t be reliably reported to driver. Driver should
expect no operation from the system and adjust their driving/
braking accordingly. Stop for 5 minutes, allowing the system to
preform a selfcheck. Read fault codes through the App. Repair or
replace light module.
Operations light Off
Warning light Intermittent
Warning light Failed
(System Available)
System is in full operation,
however the amber light has
been detected faulty
System status can’t be reliably reported to driver. Driver should
expect no operation from the system and adjust their driving/
braking accordingly. Stop for 5 minutes, allowing the system to
preform a selfcheck. Read fault codes through the App. Repair or
replace light module.
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DT
CODE
Fault Service
Description
# Amber
Flashes
# Green
Flashes Fault Service Detail
Service Diagnostic Action
Repairs and Service to the Tow Assist system must be carried out by an AL-KO authorised technician.
10 Tow Assist User Manual
0561 Battery condition
warning
21Refer to the “Power Supply Service
Instructions” Page 7
0562 Battery under voltage
fault
2 1
0563 Battery over voltage 2 1
0564 ECU voltage reference
plausibility fault
28• Internal brake voltage reference
plausibility fault
• Refer to the “Brake Magnet Service
Instructions” and “Power Supply
Service Instructions” Page 7
4031 Front Axle, Left Wheel
Speed Sensor Fault
12• Locate the wheel speed sensor on
front axle, left or right wheel brake
assembly backing plate.
• Refer to the “Wheel Speed Sensor
Service Instructions” Page 7
4032 Front Axle, Left Wheel
Tone Wheel or WSS
Mount
52
4034 Front Axle, Right
Wheel Speed Sensor
Fault
13
4035 Front Axle, Right
Wheel Tone Wheel or
WSS Mount
5 3
4037 Rear Axle, Left Wheel
Speed Sensor Fault
14• Locate the wheel speed sensor on
rear axle, left or right wheel brake
assembly backing plate.
• Refer to the “Wheel Speed Sensor
Service Instructions” Page 7
4038 Rear Axle, Left Wheel
Tone Wheel or WSS
Mount
5 4
403A Rear Axle, Right
Wheel Speed Sensor
Fault
1 5
403B Rear Axle, Right
Wheel Tone Wheel or
WSS Mount
5 5

4063 Yaw Rate
Measurement Fault
511. Check ECU mounting surface is
rigid to ensure the ECU cannot be
easily vibrated
2. Check ECU mounting hardware to
ensure ECU is securely mounted
and is in the correct orientation
3. Check ECU is protected from
oncoming projectiles by the trailer
frame or tted shield
Resolve/Repair
1. Correct all ECU mounting issues
and clear the faults
2. Preform a test drive to evaluate if
problem has been resolved
3. If fault persists, ECU should be
returned to dealer for investigation
406A ECU Inertia Sensor
Fault
5 1
4091 Center Axle, Left
Wheel Speed Sensor
Fault
16Locate the wheel speed sensor on
center axle, left or right wheel brake
assembly backing plate.
• Refer to the “Wheel Speed Sensor
Service Instructions” Page 7
4092 Center Axle, Left
Wheel Tone Wheel or
WSS Mount
56• Locate the brake magnet within front
axle, left wheel brake assembly.
• Refer to the “Brake Magnet Service
Instructions” Page 7
4094 Center Axle, Right
Wheel Speed Sensor
Fault
1 7
4095 Center Axle, Right
Wheel Tone Wheel or
WSS Mount
5 7
40B0 Front Axle, Left Wheel
Brake Magnet Fault
22• Locate the brake magnet within front
axle, right wheel brake assembly.
• Refer to the “Brake Magnet Service
Instructions” Page 7
40B1 Front Axle, Right
Wheel Brake Magnet
Fault
23• Locate the brake magnet within
the front axle, right wheel brake
assembly.
• Refer to the “Brake Magnet Service
Instructions” Page 7
DT
CODE
Fault Service
Description
# Amber
Flashes
# Green
Flashes Fault Service Detail
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DT
CODE
Fault Service
Description
# Amber
Flashes
# Green
Flashes Fault Service Detail
12 Tow Assist User Manual
40B2 Rear Axle, Left Wheel
Brake Magnet Fault
24• Locate the brake magnet within
rear axle, left or right wheel brake
assembly.
• Refer to the “Brake Magnet Service
Instructions” Page 7
40B3 Rear Axle, Right
Wheel Brake Magnet
Fault
2 5
40B4 Center Axle, Left
Wheel Brake Magnet
Fault
26• Locate the brake magnet within
center axle, left or right wheel
• Refer to the “Brake Magnet Service
Instructions” Page 7
40B5 Center Axle, Right
Wheel Brake Magnet
Fault
2 7
40F1 External Simulated
Load Fault
29External simulated load function
is enabled, but physical load not
detected, possibly open circuit.
Check/Inspect
1. Check if external simulation load is
tted to ECU.
2. Check connections and wiring
between the simulated load and
ECU.
Resolve/Repair
1. Repair any connection or wiring
between ECU and external
simulation load.
4218 Operational light Fault XXLight module failure, system has
detected a fault with the operational
light.
Check/Inspect
1. Check any connection of the ECU
light module.
2. Check connection and wiring
between light module and the ECU.
Resolve/Repair
1. Repair any connections or wiring
between light module and ECU.
2. If fault persists, replace light
module.

DT
CODE
Fault Service
Description
# Amber
Flashes
# Green
Flashes Fault Service Detail
4226 Warning light Faul XX1. Check any connection of the ECU
light module.
2. Check connection and wiring
between light module and the ECU.
Resolve/Repair
1. Repair any connections or wiring
between light module and ECU.
2. If fault persists, replace light
module.
5000 Trailer Factory
Settings Not
Programmed
31Dealer programmable trailer variant
settings are not entered correctly.
Resolve/Repair
1. If fault persists, ECU should be
returned to your dealer or installer
for investigation. for investigation.
5050 Factory Mode Enabled XXNon-Serviceable fault. Contact your
dealer or installer for investigation.
5091 General Wheel Speed
Fault
181. Check ECU mounting for rigidity
correct orientation and protection
from oncoming projectiles.
2. Check wheel brakes and bearings
for high friction components
causing wheel rotation drag.
Resolve/Repair
1. Correct all ECU mounting issues
and clear faults.
2. Ensure all wheel bearings are
running with minimal rolling
resistance. Ensure all brake
components are not causing
rolling resistance when not actively
Applied.
3. Preform a test drive to evaluate if
problem has been resolved.
4. If fault persists, ECU should be
returned for investigation.
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12 Tow Assist User Manual
5200 Wiring Harness
Feedback Fault
38Fault detected with the wiring harness
connection on the ECU.
Check/Inspect
1. Check any new wiring connections
made on the trailer to the brake
assemblies.
Resolve/Repair
1. Review trailer electrical circuit for
correctness and remove any incorrect
wiring to brake magnet.
5300 Service Brake Signal
Plausibility Fault
39ECU internal brake service monitoring
failure.
Check/Inspect
1. Check electrical brake controller
operations and wiring.
2. Check wiring and connection
between electrical brake controller
and ECU.
Resolve/Repair
1. If fault persists, ECU should be
returned to your dealer or installer for
investigation.
5137 ECU Internal
hardware Fault
58Check/Inspect
1. Check condition of ECU, it’s
mounting and wiring.
Resolve/Repair
1. If fault persists, ECU should be
returned to your dealer or installer for
investigation.
Note: All ash codes above represent active faults in the ECU system. If a fault has been set
previously and has since healed, a history ash code will be available the same fault code as
listed below with an additional 5 ash counts added to the Warning Flashes (e.g. Front Left Brake
Magnet active fault ash code = 2 & 2, Front Left Brake Magnet history fault code = 7 & 2).

13
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WARRANTY
AL-KO INTERNATIONAL PTY LTD
AL-KO TOW ASSIST PRODUCT WARRANTY
Our goods come with guarantees that cannot be excluded under the Australian Consumer Law.
You are entitled to a replacement or refund for a major failure and for compensation for any
other reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or
replaced if the goods fail to be of acceptable quality and the failure does not amount to a major
failure. AL-KO International Pty Ltd (ABN 96 003 066 813) (“AL-KO”) provides the following
warranty in relation to its Tow Assist product (“Product”). The benets of this warranty are in
addition to any rights and remedies imposed by Australian State and Federal legislation that
cannot be excluded. Nothing in this warranty is to be interpreted as excluding, restricting or
modifying any State or Federal legislation applicable to the supply of goods and services which
cannot be excluded, restricted or modied.
WARRANTY
AL-KO warrants that, subject to the exclusions and limitations below, the Product will be free
from defects in materials and workmanship for a period of 36 months from date of ttment.
AL-KO may, at its discretion, offer a longer warranty term on certain products. This warranty is
not transferable to a subsequent person if the Product is sold by the original purchaser during
the warranty period. If a defect appears in the Product before the end of the warranty period
and AL-KO nds the Product to be defective in materials or workmanship, AL-KO will, in its
sole discretion, either: replace or repair the Product or the defective part of the Product free of
charge; or b) cause the Product or the defective part of the Product to be replaced or repaired
by a qualied repairer free of charge. AL-KO reserves the right to replace defective parts of the
Product with parts and components of similar quality, grade and composition where an identical
part or component is not available. Goods presented for repair may be replaced by refurbished
goods of the same type rather than being repaired. Refurbished parts may be used to repair the
goods.
WARRANTY PROCESS
1. If a fault covered by warranty occurs, the customer must within 7 days contact the dealer
from which the Product was purchased, or AL-KO at the contact address listed on the following
page. 2. Any warranty claim must be accompanied by: a. proof of purchase; b. full details of
the alleged defect; and c. any relevant documentation (such as maintenance records). 3. The
customer must make the Product available to AL-KO or its authorised repair agent for inspection
and testing within 14 days of contacting AL-KO or the dealer in accordance with this warranty
claims procedure. If inspection and testing nds no defect in the Product, the customer must pay
AL-KO’s costs of service work and testing. 4. The cost of transportation to or from AL-KO or the
authorised repair agent is to be paid by the customer.

14
EXCLUSIONS
The warranty will not apply where:
1. the Product has been repaired, altered or modied by someone other than AL-KO or an
authorised repair agent;
2. the Product was improperly installed or used;
3. AL-KO cannot establish any fault in the Product after testing and inspection;
4. the Product has been used other than for the purpose for which it was designed;
5. the defect in the Product has arisen due to the customer’s failure to properly use and
maintain the Product in accordance with AL-KO’s instructions, recommendations and
specications (including maintenance);
6. the Product has been subject to abnormal conditions, including environment, temperature,
water, re, humidity, pressure, stress or similar;
7. the defect has arisen due to abuse, misuse, neglect or accident;
8. the defect has arisen due to a power surge or other fault in the supply of electricity; or
9. unauthorised parts or accessories have been used on or in relation to the Product;
10. the defect is a deterioration of the appearance of the product;
11. the defect is a result of wear & tear.
LIMITATIONS
AL-KO makes no express warranties or representations other than set out in this warranty.
The repair or replacement of the Product or part of the Product is the absolute limit of AL-KO’s
liability under this express warranty.
CONTACT
AL-KO International Pty Ltd
67 Nathan Road, Dandenong South, Victoria, 3175
Phone: [phone]
Email: [email protected]
Tow Assist User Manual

15
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AL-KO International Pty Ltd (ABN 90 003 066 813)
67 -91 Nathan Road, Dandenong South, VIC 3175 Australia Phone: [phone] Fax: [phone]
Web: www.alko-tech.com.au Email: [email protected]
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