BENDIX® INTELLIPARK® ELECTRONIC
PARKING BRAKE CONTROL SYSTEM FOR
FREIGHTLINER® TOWING AND
NON-TOWING VEHICLES OPERATOR’S MANUAL

AVAILABLE AT

TABLE OF CONTENTS
Important Safety Information . . . . . . . . . . . . . . . . . . . . . . . 3
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Switch Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Setting and Releasing the Brakes . . . . . . . . . . . . . . . . . . . . . 5
LEDs on the Dash Electronic Control Unit (DECU) . . . . . . . . . . . 6
Vehicle Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Driver Assistance Features . . . . . . . . . . . . . . . . . . . . . . . . . 7
Smart Unpark™ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Rollaway Intervention . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Rollaway Intervention Acknowledgement . . . . . . . . . . . . . . 8
Exhaust-at-Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Park via Shifter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Operating with Active Diagnostic Trouble Codes (DTCs) . . . . . . 10
Setting the Parking Brakes While there is an active
Diagnostic Trouble Code (DTC) . . . . . . . . . . . . . . . . . . . . 10
Starting the Vehicle After a Diagnostic Trouble
Code (DTC) has been Remedied . . . . . . . . . . . . . . . . . . . 10
Bobtail Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Interlock Override Mode . . . . . . . . . . . . . . . . . . . . . . . . 11
Freightliner® Integrated Display Notifications . . . . . . . . . . . . 12

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IMPORTANT SAFETY INFORMATION
Bendix safety technologies complement safe driving practices. No
commercial vehicle safety technology replaces a skilled, alert driver
exercising safe driving techniques and proactive, comprehensive driver
training. Responsibility for the safe operation of the vehicle remains with
the driver at all times.
The Bendix® Intellipark® Electronic Parking Brake (EPB) system is a driver
assistance, not driver replacement, technology. Safe driving practices,
habits, and driver training are critical for safety on the road.
The driver should always manually set the tractor and trailer parking
brakes and should not rely on the Intellipark EPB system to do so. Data
captured through the Intellipark EPB system can show most abuse or
misuse of the system.
Bendix®-brand Electronic Control Units (ECUs), including the Intellipark EPB
ECU, are not designed to store data for purposes of accident reconstruction,
and Bendix® ACom® Diagnostic Software is not intended to retrieve data
for purposes of accident reconstruction. Bendix makes no representations
as to the accuracy of data or video retrieved and interpreted from ECUs
for purposes of accident reconstruction. Bendix does not offer accident
reconstruction services or interpretation of stored data. Bendix ECUs are
not protected from fire, loss of power, impact damage, or other conditions
that may be sustained in a crash situation and may cause data to be
unavailable or irretrievable.
Vehicle operators and maintenance personnel must observe the LEDs
present on the red and yellow switches to determine the status of the
Intellipark EPB system. Consult the Intellipark Operator’s Manual if all
LEDs do not illuminate immediately after the system powers on, or if any
of the LEDs are blinking. For complete maintenance information, refer
to SD-03-1189, Bendix® Intellipark® Electronic Park Brake (EPB) System, on
B2Bendix.com.
In certain situations – particularly in cold weather or when the vehicle
has low system pressure – a long switch push or pull may be required
for the vehicle to unpark or park. This is similar to the current pneumatic
valve functionality. In these circumstances, hold the switch in the pushed
or pulled position until the LEDs indicate the requested state (parked:
illuminated LEDs; unparked: non-illuminated LEDs).
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INTRODUCTION
This vehicle is equipped with a Bendix® Intellipark® Electronic Parking Brake (EPB)
system. The Operator’s Manual provides an overview of the Intellipark EPB system
Dash Electronic Control Unit (DECU) for select Freightliner® towing and non-towing
vehicles. This manual explains the safe practices, functions, features, and alerts of the
system. Vehicles equipped with the Intellipark EPB system include electronic DECU
switches instead of pneumatic push/pull parking brake knobs.
Read this manual thoroughly before operating the system. Be familiar with the
controls, system alerts, and what to expect when the system is in operation. Keep
this manual in the vehicle at all times as a reference for the system, its operation,
and its performance characteristics.

Pneumatic
Push/Pull Knobs
Replaced by the Intellipark DECU Switch(es)

Dash Electronic
Control Unit (DECU) Switches
Included with the Intellipark EPB System

MAINTENANCE
Vehicle maintenance mode can be used when maintenance needs to be performed.
For complete maintenance information, refer to SD-03-1189, Bendix® Intellipark®
Electronic Park Brake (EPB) System, on B2Bendix.com.

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SWITCH CONFIGURATIONS
There are two (2) different configurations of the Bendix® Intellipark® Dash Electronic
Control Unit (DECU):
•

Towing Vehicles: Two-switch vertical configuration

•

Non-towing Vehicles: One-switch vertical orientation
Towing Vehicle DECU

Non-towing Vehicle DECU

Vertical Configuration

Vertical Configuration

NOTE: This Operator’s Manual will detail the operation for the towing vehicle DECU,
but the functionality remains the same for both towing and non-towing DECU
configurations.

SETTING AND RELEASING THE BRAKES

Fully PULL the switches until the LEDs
illuminate to indicate the parking
brakes have been set

Fully PUSH the switches until the LEDs
are no longer illuminated to indicate
the parking brakes have been released

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LEDs ON THE DASH ELECTRONIC CONTROL UNIT (DECU)
Illuminated LEDs on the parking brake switches indicate that the parking brakes
are set.

Parking Brakes Set

Parking Brakes NOT Set

Parking Brakes Set

Parking Brakes Set

Both Tractor and Trailer

Neither Tractor nor Trailer

Trailer ONLY

Tractor ONLY

VEHICLE STARTUP
During vehicle startup, all four (4) LEDs
located on the DECU will illuminate for
approximately three (3) seconds, turn off
for approximately two (2) seconds, then
indicate the parking brake status.

LED
Illumination
at Startup

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DRIVER ASSISTANCE FEATURES
Smart Unpark™
To release the Electronic Parking Brake (EPB), all of the following conditions must
be met:
•

The driver door is closed.

•

The service brake pedal is pressed.

•

The ignition power is on.

NOTE: An additional condition exists to unpark vehicles equipped with certain
Allison® transmissions. For non-towing variant vehicles equipped with an Allison 1000
or 2000 Series transmission with the optional Bendix® Park-via-Shifter functionality,
the shifter has to be moved to a non-parked state (neutral, drive, reverse, etc.) to
unpark the vehicle.
Once all of the above conditions are met, the red and yellow parking brake switches
may be pressed to release the trailer and tractor parking brakes.
NOTE: If the driver receives a low air pressure warning, the vehicle may not be
able to be unparked.

Rollaway Intervention
The Rollaway Intervention feature is intended to automatically set the parking
brakes on both the tractor and trailer if the driver forgets to do so and the Bendix®
Intellipark® Electronic Parking Brake (EPB) system detects the driver does not have
control over the vehicle and it is not parked.
The system may determine the driver does not have control over the vehicle when
the driver door is open AND all of the following conditions are met:
•

The vehicle speed is low or zero;

•

The accelerator pedal is not pressed; and

•

The foot brake is not being applied.

Refer to the table on Page 12 for notifications you may see on the integrated display
associated with this feature.

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Rollaway Intervention Acknowledgement
When the Rollaway Intervention feature is activated, the LEDs will continuously
blink and sound an audible noise alert until the driver acknowledges the rollaway
intervention event by pulling the yellow parking brake switch.
Once the driver acknowledges the rollaway intervention event by pulling the yellow
parking switch, the parking brakes will be manually set. After the parking brakes are
set, this warning and audible noise alert will go away. To release the parking brakes,
the driver must follow the Smart Unpark™ conditions previously mentioned in this
manual.

Exhaust-at-Speed
In an emergency situation, at low vehicle speeds, the Bendix® Intellipark® Electronic
Parking Brake (EPB) system may help the driver slow the vehicle when the service
brakes are not available. Pull the yellow or red Dash Electronic Control Unit (DECU)
switch until the parking brakes are applied. Pulling the yellow DECU switch will apply
both the tractor and trailer brakes, while pulling the red DECU switch will apply the
trailer brakes only.
Once an exhaust-at-speed event has been initiated, if the driver releases the switch
while the vehicle is in motion, the parking brakes may release if there is no brake
system malfunction that would prevent them from releasing. If the driver releases
the switch when the vehicle is at low or zero speed, the parking brakes will remain
applied unless the driver pushes the switch(es).

Vehicle stability may be compromised when the Exhaust-at-Speed feature is
active.
NOTE: Refer to the section titled Smart Unpark™ to ensure all conditions are met to
properly release the parking brakes.

Park via Shifter
If your vehicle is equipped with an Allison® 1000 or 2000 Series Transmission with
Bendix® Park-via-Shifter functionality, the parking brake will automatically be set
when the vehicle is at low or zero speed, unparked, and when the shifter is moved
from a non-parked state (neutral, drive, reverse, etc.) to park. All LEDs on the DECU
and the park sign on the vehicle cluster will then be illuminated.

This is a driver-assistant feature. The driver must pay close attention to the
LEDs on the DECU and dash indication to make sure the vehicle is parked
before exiting the vehicle.
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WARNING: Blinking LEDs may indicate
there is a problem, such as if the driver
unparked the vehicle with low system
supply pressure. Refer to the integrated
display for further instructions on how
to proceed. In some instances, parking
brakes may be unavailable and the vehicle
should NOT be driven. Refer to the table
on Page 12 for notifications you may see
on the integrated display associated with
Bendix® Intellipark® Electronic Parking
Brake (EPB) system Diagnostic Trouble
Codes (DTCs).
Refer to the Bendix Intellipark Electronic
Parking Brake System Service Data Sheet,
SD-03-1189, on B2Bendix.com for further
information on system DTCs.
WARNING: Towing vehicles: If the two (2) inside
LEDs are fully lit and not blinking, the system
has generated a Diagnostic Trouble Code (DTC).
The vehicle should NOT be driven and should
be serviced immediately.
Non-towing vehicles: If one LED is fully lit and
not blinking, and the other LED is off, the system
has generated a DTC. The vehicle should NOT
be driven and should be serviced immediately.

LEDs surrounded by a solid line represent fully lit, non-blinking LEDs. LEDs surrounded by a dotted line represent blinking LEDs.

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OPERATING THE BENDIX® INTELLIPARK® ELECTRONIC
PARKING BRAKE (EPB) SYSTEM WITH ACTIVE
DIAGNOSTIC TROUBLE CODES (DTCs)
For complete DTC information, refer to SD-03-1189, Bendix® Intellipark® Electronic Park
Brake (EPB) System, on B2Bendix.com.

Setting the parking brakes while there is an active
DTC on the Intellipark EPB System
Stop on a level surface and in a safe place. Shut off the engine (the key should be in
the off position) and open the driver-side window so the exhaust of air can be heard,
which would indicate the parking brakes being applied. Perform the following steps:
1. Attempt to park the trailer by pulling the trailer parking switch (red). Listen for
the exhaust of air.
2. Attempt to park the tractor by pulling the tractor parking switch (yellow). Listen
for the exhaust of air.
3. If the tractor or the trailer brakes did not apply, ensure the vehicle is keyed off
and “fan down” the reservoirs by repeatedly depressing the service brake pedal
to automatically apply the spring brakes.
4. Chock the wheels.
5. Switch off the battery disconnect to the vehicle or key off for approximately
30 seconds.
6. Key on the vehicle or connect the battery and then attempt to park.
7. Service the vehicle.

Starting the vehicle after a DTC on the
Intellipark EPB System has been remedied
1. Ensure the reservoirs are depleted of air.
2. Once the reservoirs are depleted of air, remove the wheel chocks prior to starting
the engine.
3. Keep the brake pedal depressed to hold the vehicle stationary in case the spring
brakes are released.
4. Start the engine and stay in the driver’s seat as the air brake system builds air,
filling the reservoirs.
5. Once the system air is at a normal operating range, the vehicle can be unparked
and driven. Push the red and yellow switches to unpark the vehicle.

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Bobtail Mode
When driving bobtail – or driving without a trailer attached to the tractor – the trailer
switch LEDs will be illuminated unless bobtail mode is entered. Bobtail Mode allows
you the ability to turn off the two (2) red LEDs on the trailer air supply switch when
driving bobtail. Bobtail Mode can be entered manually by following the steps below.
To enter Bobtail Mode:
• The vehicle must be stationary or at a low speed.
• The driver must press the yellow switch and release the tractor parking brakes.
• The driver must pull and hold the red trailer switch for a minimum of
approximately three (3) seconds.
Situations in which the vehicle will exit Bobtail Mode:
• The key is turned off.
• The driver applies the tractor parking brake by pulling the yellow switch.
• The driver pushes or pulls the red trailer switch.
• The vehicle experiences a Rollaway Intervention Event. Refer to Page 7 for
additional details.

Interlocks Override Mode
In an emergency situation, such as when an interlock Diagnostic Trouble Code (DTC)
appears or reports incorrect information and the driver cannot unpark the vehicle,
the following procedure can be used to unpark:
1. Turn the ignition on.
2. Fully press and release the yellow
tractor parking brake switch
consecutively four (4) times.

3. On the fifth switch, press and hold
the yellow tractor parking brake
switch for approximately five (5)
seconds.

If this sequence is completed in less than approximately 20 seconds and full system
pressure is present, the Bendix® Intellipark® Electronic Parking Brake (EPB) Control System
will enter Interlocks Override Mode and the driver will be able to unpark without
interlocks. All interlock features related to the foot brake, door, and transmission (if
applicable) will be disabled. Once the vehicle is unparked, one can exit this mode by
pulling the yellow switch and parking the vehicle or performing a key cycle on/off.
When the Interlocks Override Mode is active, the middle LED(s) will blink three (3)
times continously followed by a brief pause and then blink another three (3) times
continously until the Interlocks Override Mode is exited by pulling the yellow tractor
parking brake switch.
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Freightliner® Integrated Display Notifications
Refer to the OE manual for more details on the latest vehicle-specific display
notifications – if available – for the Bendix® Intellipark® Electronic Parking Brake
(EPB) Control System.
SITUATION: One (1) or more than one (1)
interlock (doors closed, ignition on, service
brake pressed, and/or – if applicable – shifter in
non-park state [drive, reverse, neutral, etc.]) is
not met and the driver is attempting to unpark
the vehicle with a yellow and/or red switch push.
RESOLUTION: Ensure all interlocks (doors
closed, ignition on, service brake pressed, and
– if applicable – shifter in non-park state [drive,
reverse, neutral, etc.]) are met followed by a
yellow and red switch push.
SITUATION: The driver is not in control of
the vehicle (vehicle unparked, service brake
not pressed, and/or door is open). Rollaway
Intervention is about to set the parking brake
unless the driver acts.
RESOLUTION: Take control of the vehicle by
pulling the yellow switch to set the parking brake.

SITUATION: Rollaway Intervention has activated
and set the parking brake.
R E S O L U T I O N : A c k n o w l e d g e Ro l l a w a y
Intervention by pulling the yellow switch to
unpark the vehicle.
Tractor/straight truck parked indication.

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