SmarTire® Tire Pressure Monitoring System (TPMS) by Bendix CVS
Replacement Service Kit
KIT COMPONENTS

GENERAL SAFETY GUIDELINES

The following components are in the SmarTire® Tire
Pressure Monitoring System (TPMS) by Bendix CVS
service kit:
Component

Quantity

Electronic Control Unit (ECU)

1

Washer

2

Nut

2

Patch Cable

1

BACK UP THE CURRENT TPMS SETTING
1. If the current Electronic Control Unit (ECU) can
communicate on the CAN bus, use the Bendix® ACom®
PRO™ diagnostic software connected to the vehicle
diagnostic port.
2. Select the Bi-Directional tool bar icon, and then start
the TPMS Backup and Restore application.
3. Select the Save Settings button to create a backup of
the ECU parameters to your computer.

REMOVING THE PREVIOUS ECU
1. U
nscrew the existing antenna connector from the
ECU (1). See Figure 1.
2. Unplug the main harness from the existing TPMS
ECU (2).

2

1

Figure 1 - Removing the Previous ECU

WARNING! PLEASE READ AND
FOLLOW THESE INSTRUCTIONS
TO AVOID PERSONAL INJURY OR DEATH:

When working on or around a vehicle, the following
guidelines should be observed AT ALL TIMES:
▲Park the vehicle on a level surface, apply the parking
brakes, and always block the wheels. Always wear personal
protection equipment.
▲Stop the engine and remove the ignition key when working
under or around the vehicle. When working in the engine
compartment, the engine should be shut off and the ignition
key should be removed. Where circumstances require that
the engine be in operation, EXTREME CAUTION should be
used to prevent personal injury resulting from contact with
moving, rotating, leaking, heated, or electrically charged
components.
▲Do not attempt to install, remove, disassemble, or
assemble a component until you have read, and thoroughly
understand, the recommended procedures. Use only the
proper tools and observe all precautions pertaining to use
of those tools.
▲If the work is being performed on the vehicle’s air brake
system, or any auxiliary pressurized air systems, make
certain to drain the air pressure from all reservoirs before
beginning ANY work on the vehicle. If the vehicle is
equipped with a Bendix® AD-IS® air dryer system, a Bendix®
DRM™ dryer reservoir module, a Bendix ® AD-9si ®, AD-HF®,
or AD-HFi™ air dryer, be sure to drain the purge reservoir.
▲Following the vehicle manufacturer’s recommended
procedures, deactivate the electrical system in a manner
that safely removes all electrical power from the vehicle.
▲Never exceed manufacturer’s recommended pressures.
▲Never connect or disconnect a hose or line containing
pressure; it may whip and/or cause hazardous airborne
dust and dirt particles. Wear eye protection. Slowly open
connections with care, and verify that no pressure is
present. Never remove a component or plug unless you are
certain all system pressure has been depleted.
▲Use only genuine Bendix ® brand replacement parts,
components, and kits. Replacement hardware, tubing, hose,
fittings, wiring, etc. must be of equivalent size, type, and
strength as original equipment and be designed specifically
for such applications and systems.
▲Components with stripped threads or damaged parts should
be replaced rather than repaired. Do not attempt repairs
requiring machining or welding unless specifically stated
and approved by the vehicle and component manufacturer.
▲Prior to returning the vehicle to service, make certain all
components and systems are restored to their proper
operating condition.
▲For vehicles with Automatic Traction Control (ATC), the ATC
function must be disabled (ATC indicator lamp should be
ON) prior to performing any vehicle maintenance where
one or more wheels on a drive axle are lifted off the ground
and moving.
▲The power MUST be temporarily disconnected from the
radar sensor whenever any tests USING A DYNAMOMETER
are conducted on a vehicle equipped with a Bendix ®
Wingman ® system.
▲You should consult the vehicle manufacturer's operating
and service manuals, and any related literature, in
conjunction with the guidelines above.

1

3. Remove the two (2) bolts securing the original Electronic
Control Unit (ECU) to the vehicle chassis and set it aside.
See Figure 2.

3. Strip the cut wires. Using a suitable crimping tool, crimp
the provided terminals to the stripped wires. See Figure 4.

Bolts

Figure 4 - Stripping the Wires and Crimping the Terminals

4. Carefully push the terminal into the back of the provided
4-pin Deutsch connector. Ensure the crimped end does
not have any sharp protrusions that could damage the
silicone seal. See Figure 5 for the proper way to insert
the wires.

Figure 2 - Removing the ECU Bolts

REPLACING THE ORIGINAL HARNESS
CONNECTOR
1. M
ake note of the wire colors and position(s) on the
original connector housing. It is important to identify the
power, ground, CAN high, and CAN low wires. These will
normally be red, black, yellow, and green respectively.
If these are not the colors used, use the pin diagram in
Figure 3 to identify and notate the wire signals.
2. Using wire cutters, cut the original wires close to the top
of the connector shell.

Pin No.

Signal

1

+12V Power (Red)

2

Ground (Black)

3

CAN Low (Green)

4

CAN High (Yellow)

Figure 5 - Inserting the Wires

5. Ensure the terminals are fully seated in the housing. Insert
the locking cap to the front of the housing. See Figure 6.
Pin No.

Signal

2, 15

+12V Power

1, 13, 14, 15, 24, 26

Ground

11

CAN Low

12

CAN High

Figure 3 - Replacing the Original Harness Connector
Figure 6 - Inserting the Locking Cap to the Housing

2

MOUNTING THE NEW ELECTRONIC CONTROL
UNIT (ECU)

5. Plug the 4-pin Deutsch connector into the patch cable.
See Figure 9.

1. Mount the provided adapter bracket in the location where
the original ECU was mounted. The studs should be in
the forward location where the original harness entered
the ECU. Leave the attaching bolts loose. See Figure 7.

Figure 9 - Connecting the Patch Cable to the New ECU

Figure 7 - Adapter Bracket

2. Mount the new ECU onto the studs of the bracket and
secure the ECU with the supplied washers and nuts.
Slide the bracket on the original plate to optimize the
ECU location. Ensure the ECU is not in contact with
any other components on the vehicle. Then, tighten the
bolts between the adapter plate and the original bracket.
See Figure 8.

RESTORING THE SMARTIRE® TIRE
PRESSURE MONITORING SYSTEM (TPMS)
BY BENDIX CVS CONFIGURATION
1. Connect to the Bendix® ACom® PRO™ diagnostic
software.
2. Browse to the Axle Setup screen and configure the
number of axles and tires as per the vehicle configuration.
• If it was possible to back up the previous TPMS
settings, start the same TPMS Backup and Restore
application, but this time, press the Load Settings
button and select the previously saved backup file.
• If it was not possible to back up the previous TPMS
settings, then each tire ID will need to be learned.
Click on a Tire Icon in the ACom PRO diagnostic
software and press the Learn button. Navigate to
the tire to be learned and use the Bendix® LF Hand
Tool to activate the sensor. The sensor should be
learned into the ECU. Repeat these steps for all
other tire locations. The other parameters, such as
Cold Inflation Pressure (CIP) and warning levels,
will have to be modified to suit the application if the
default values provided are not appropriate.

Figure 8 - Mounting the New ECU on the Bracket

3. Reattach the existing antenna connector lead to the
new ECU.
4. Plug the provided patch cable into the front of the new
ECU.

3

4

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