BENDIX iSENSE AIR DISC
BRAKE WEAR SENSING
®

™

TAKE THE GUESSWORK OUT OF AIR DISC BRAKE (ADB) PAD
REPLACEMENT AND LOWER YOUR TOTAL COST OF OWNERSHIP.
Downtime – there’s no avoiding it. Wouldn’t it be great to know when your vehicle’s pads and rotors
need replacement – before they reach the end of their service life? How much would efficiency
improve if you could proactively schedule maintenance? What about the boost to your fleet’s bottom line
through optimized truck productivity and increased uptime?
The Bendix® iSense™ Air Disc Brake Wear Sensing Systems can provide your fleet with powerful
information that can:
n R
educe maintenance costs, time, and effort – know when pads are approaching replacement conditions
without removing the wheels
n Optimize your friction replacement schedule by alerting your fleet back office via telematics
n S treamline maintenance by enabling your technicians to perform other service along with the necessary
pad replacement
n P
rotect expensive components (rotor and caliper*) from damage through early detection of worn
ADB pads
*Typical cost to replace a rotor in the aftermarket: $600 (parts and two hours labor)

Bendix offers two brake wear sensing systems – iSense™ Pro and iSense™
Bendix iSense Pro and iSense are available for the industry-leading family of OE Bendix® ADB22X® air disc brakes (both tractor
and trailer) through an always expanding list of OE tractor and trailer manufacturers.

iSense™ Pro Air Disc Brake Wear Sensing
The iSense Pro package is our most robust system.
iSense Pro shares the same connectivity (J1939 CAN) and communications to your fleet back office as iSense, but goes much
further in the specific data it provides. iSense Pro provides continuous wear sensing, and:
• Provides, by axle, percentage of remaining brake life versus replacement condition at each wheel end
• Notifies if one side is wearing faster than the other via cross axle data
• Supplies constant J1939 messaging which can be accessed by your telematics program
Here’s how iSense Pro works:
The wear sensor (positioned inside the adjuster on the back of
the caliper) continuously measures the combined total wear
of the inboard pad, rotor, and outboard pad by converting the
rotation of the adjuster into an electrical signal. The electrical
signal is carried by a cable to the ECU (electronic control unit),
then on to your fleet via a range of telematics providers, the
Bendix® ACom® PRO™ remote diagnostic software, or the
SafetyDirect®. video-based driver safety platform.

Wear Sensor

The cable carries data to the ECU, then
the ECU shares data via telematics

Communication to Fleet
Operations
Here’s an example of wear life
remaining for each wheel end
as seen via ACom PRO’s color
coordinated readout. In this
example, service personnel would
see that the wear across the axle
is not consistent and proactively
take steps to investigate.
Fleets can access remaining life
data at any time. See Service Data
Sheet SD-31-7570 (iSense Pro) or
SD-31-70082 (iSense).

Telematics Example Displaying Varying Degrees of Brake Life
Bendix ADB Brake Wear Sensing ECU
Estimated Brake Wear Life (pads + rotor) Remaining

Right
Left

63%

63%

86%

1

2

3

3%

31%

80%

BENDIX iSENSE™ AIR DISC BRAKE WEAR SENSING
iSense Brake Wear Sensing
Sensors mounted to the ADB pads detect when the pad
thickness is approaching replacement condition. Next,
the system records a diagnostic troubleshooting code (DTC),
and the signal is received by the ECU (electronic control unit)
on the tractor or the TABS (trailer antilock braking system)
unit on the trailer.
The code is transmitted on the CAN bus protocol via the
J1939 to a range of telematics providers. Telematics (if
equipped) notifies your fleet office that pad replacement
is needed.

How iSense Pro/iSense works

Trailer
Telematics

Tractor
Telematics

Pad
Wear
ECU

Sensor locations.
The ECU monitors sensor
for change of state.

1. T he sensor detects that the pad or brake wear life is nearing replacement condition.
2. T he ECU (tractor) or the TABS unit (trailer) receives the iSense/iSense Pro replacement signal, triggering a
diagnostic troubleshooting code (DTC).
3. Vehicle telematics (if equipped) signals your fleet home office of the need to replace the air disc brake pads
and/or rotors.
4. T he service technician uses a remote diagnostics tool or the Bendix® ACom® PRO™ remote software
diagnostic software to identify the location of the worn brake pads and/or rotors.

BENDIX iSENSE™ AIR DISC BRAKE WEAR SENSING
Which iSense™ product is right for your fleet?
iSense™

iSense™ Pro

Pad replacement
alert only

Continuous monitoring of
% of pad and rotor life

Connectivity on Vehicle
(J1939 CAN)

ü

ü

Communications to Fleet Operations
Telematics reporting

ü

ü

Continuous Wear Sensing
Measures combined pad and rotor wear progression

N/A

ü

Wheel End Identification
Identifies wheel end requiring maintenance,
including a view across the axle

N/A

ü

Condition-based Monitoring
Alert of required maintenance

Replacement Parts
It’s easy to service iSense™ Pro and iSense™.
Product

Part Number

Description

Instructions

iSense™ Pro

K129276

BX276™ OE Pads

Once new pads are installed, the system
resets and will resume monitoring brake
wear life. Continue to evaluate rotor wear
and replace as needed.
If you suspect the adjuster cover or wear
sensor is damaged, refer to the ADB Service
Data Sheet (SD-23-7541).

iSense™

K162217 ( Version 1)
K196276 ( Version 2)

BX276™ OE Pads with
sensors

Install the pads according to Bendix
standard procedure*.

K162565 ( Version 1)
K195039 ( Version 2)

Sensors only

Insert the wear sensors into position in
the new pads, then route the sensor cable
through the table plate channel and secure
the plate with the mounting hardware
retained at disassembly.

Version 1: Kenworth vehicles
already in service. Version 2:
all other vehicles.
*For installation instructions, or other maintenance
information, see the Bendix® Air Disc Brake Service
Data Sheet (SD-23-7541) available on the Document
Library at B2Bendix.com.

Discover more about Bendix iSense™ Air Disc
Brake Wear Sensing. Contact your Bendix Sales
Representative today, call 1-800-AIR-BRAKE
(1-800-247-2725) or visit bendix.com today.

BW8124 Rev. 001 © 2024 Bendix Commercial Vehicle Systems LLC, a member of Knorr-Bremse • bendix.com • 3/2024 • All Rights Reserved

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