ZONE THAT MUST
BE KEPT CLEAR!

APPENDIX B - BENDIX™ FLR-20™ RADAR SENSOR ALIGNMENT
Appendix B
Bendix FLR-20™ Radar Sensor Alignment
™

B1.0 Radar Alignment Flowchart

For Bendix™ FLR-10™ radar sensors, see Bendix® Service Data Sheet (SD-61-4962).

Use this flowchart to find which section(s) of this Appendix to use.

Call the Tech Team:
1-800-AIR-BRAKE
(1-800-247-2725),
option 2.

Use the Bendix® ACom®
Diagnostics Alignment
Procedure
(Step B3)

Appendix B

45

Appendix B
Bendix FLR-20™ Radar Alignment
™

B1.1 General Information About Adjusting The Alignment
Accurate vertical and lateral alignment of the radar sensor is critical for proper operation of Bendix® Wingman®
Advanced™. If the alignment is outside a certain range it could cause false warnings, missed warnings, and a Diagnostic
Trouble Code (DTC) in the system.
The radar sensor is mounted to the front of the vehicle using a bracket with three stand-offs, two of which are used
when making adjustments, if necessary.
It is important to use the correct stand-off when making any alignment adjustments.
Use a Torx® T-20 screwdriver here to
adjust for the vertical alignment

IMPORTANT:
Do not adjust
this stand-off!! Use a Torx T-20 screwdriver here to
adjust for the lateral alignment

ABOVE: A TECHNICIAN MAKES AN ADJUSTMENT TO THE LATERAL ALIGNMENT STANDOFF.
BELOW: THE VERTICAL ALIGNMENT STANDOFF IS ADJUSTED.

Call the Bendix Tech Team at 1‑800‑AIR‑BRAKE (1‑800‑247-2725), option 2 for troubleshooting assistance.

46

Appendix B

Appendix B
Bendix FLR-20™ Radar Alignment
™

B2 Lateral Alignment Using The Learned Alignment Screen
This is the preferred and recommended method for lateral alignments
This method is for vehicles with Bendix™ Driver Interface Unit (DIU™) displays that use software whose version is
12.220 and above. To verify the DIU’s software version, go to the Volume screen, where it is displayed in the top
right-hand corner.
If the radar’s lateral alignment is not correct, the system calculates over the course of many hours of driving, an alignment
adjustment value. The DIU displays the learned alignment value, and also shows the technician the direction to turn,
and number of turns to make to, the lateral alignment adjustment screw.
B2.1

Tools needed: DIU (with software version 12.220 or above), and a Torx® T-20 screwdriver.

B2.2

Enter the DIU menu item titled “Radar” and select “Alignment Check”.

B2.3

Upon selecting the “Alignment Check” menu item the following screen will be displayed:

Bendix® DIU screen showing learned alignment value

IMPORTANT:
Do not adjust
this stand-off!!

Use a Torx T-20 screwdriver here to

adjust for the lateral alignment

For example, the Figure above shows a correction value of five (5) full turns counterclockwise is needed. The
correction count and arrow direction displayed shows that in order to adjust the radar to be correctly aligned
with the travel of the vehicle, the lateral adjustment screw (lower right screw when facing the front of the vehicle)
should be turned.
B2.4

Make the adjustment shown on the Bendix DIU.

IMPORTANT: Make necessary adjustments to the alignment standoff prior to resetting the alignment value.
B2.5

Select “Reset” and then “Exit” on the Bendix DIU screen to return to the default screen.

B2.6

Cycle the ignition power.

B2.7

IMPORTANT: Before returning the vehicle to service, go to Appendix B4 and check the vertical alignment.

NOTE: The alignment process is complete after the vertical alignment has been checked (and adjusted, if
necessary.) You do not need to test-drive the vehicle.
Call the Bendix Tech Team at 1‑800‑AIR‑BRAKE (1‑800‑247-2725), option 2 for troubleshooting assistance.

Appendix B

47

Appendix B
Bendix FLR-20™ Radar Alignment
™

B3 Lateral Alignment Using Bendix® ACom® Diagnostic Software
Use this method to align the Bendix FLR-20 radar laterally – when the vehicle
does not have a Bendix™ DIU™, or has a DIU (but its software version is prior to 12.220)
B3.1

Tools needed: Bendix ACom Diagnostic Software, and a Torx® T-20 screwdriver.

B3.2

Connect the vehicle to a laptop computer with the current release of the Bendix ACom Diagnostic Software.

B3.3

See the “Alignment Value” shown on the Configuration screen.
If the alignment value shown by Bendix ACom Diagnostic Software is between -1.1° and 1.1­°, this is acceptable
and the system should operate normally. A value outside that range means the radar sensor should be adjusted.

THE BENDIX® ACOM® DIAGNOSTIC SOFTWARE SCREEN SHOWING THE ALIGNMENT VALUE

Alignment
Value Range
(Degrees)
-2.0 to -1.8
-1.7 to -1.6
-1.5 to -1.2

Number of Full Turns of
the Lateral Alignment
Adjustment Screw

Service Action

6 clockwise

Adjustment
Required

5 clockwise
4 clockwise

-1.1 to -0.8

3 clockwise (optional)

-0.7 to -0.5

2 clockwise (optional)

-0.4 to -0.3
-0.2 to 0.2
0.3 to 0.4

No Adjustment
Needed

1 clockwise (optional)
1 counterclockwise (optional)

-0.5 to 0.7

2 counterclockwise (optional)

0.8 to 1.1

3 counterclockwise (optional)

1.2 to 1.5
1.6 to 1.7
1.8 to 2.0

Adjustment
Required

4 counterclockwise
5 counterclockwise
6 counterclockwise

ADJUSTMENT SCREW ROTATION REQUIRED

Note: The maximum Alignment Value shown by the Bendix ACom Diagnostic Software is two degrees (plus or minus).
48

Appendix B

Appendix B
Bendix FLR-20™ Radar Alignment
™

B3 Lateral Alignment Using Bendix® ACom® Diagnostic software (Continued)
B3.4

See the image below to see the lateral alignment adjustment screw location.
Use Table in B3.3 on the prior page to find the number of full turns of the stand-off adjustment screw required
to bring the radar sensor back into alignment. A Torx® T-20 screwdriver. with a mark or other indicator may
help track the number of turns.

IMPORTANT:
Do not adjust
this stand-off!! Use a Torx T-20 screwdriver here to
adjust for the lateral alignment

B3.5

After making the adjustment, clear the Bendix® Wingman® Advanced™ system Diagnostic Trouble Code (DTC)
using the procedure in Section 4.4: Clearing Diagnostic Trouble Codes (DTCs).

B3.6

Then follow steps B3.7-12 to reset the alignment value stored in the system.

B3.7

Procedure to Reset the Alignment Value. Select Wingman Advanced System on the starter screen, and
then select “Start with ECU.” Select “Config” on the Wingman Advanced System Status window.

B3.8

Select “Modify” on the Configuration Status window.

BENDIX® ACOM® DIAGNOSTIC SOFTWARE: CONFIGURATION AND CHANGE CONFIGURATION SCREENS

B3.9

Select “Reset Alignment Value” in the Change Configuration box. (See Appendix H for more details.)

B3.10 Close the Bendix ACom Diagnostic Software program and any open windows.
B3.11 Cycle the vehicle ignition.
B3.12 After the vehicle has been driven at least 20 miles at above 35 mph (56 kph) in multi-lane urban traffic,
re‑check the alignment value using Bendix ACom Diagnostic Software.
Call the Bendix Tech Team at 1‑800‑AIR‑BRAKE (1‑800‑247-2725), option 2 for troubleshooting assistance.
Appendix B

49

Appendix B
Bendix FLR-20™ Radar Alignment
™

B4 Vertical Alignment Using An Inclinometer
B4.1
B4.2
B4.3

Tools Needed: A digital inclinometer, Torx® T-20 screwdriver. (If a clip from the Bendix Alignment Tool kit is
available, the clip may be placed over the front of the radar sensor during this process.)
Park the vehicle on a level floor. Air suspensions must be charged and stable.
Calibrate (or “zero”) the inclinometer on a horizontal section of the frame rail. Follow the manufacturer’s
instructions (typically digital inclinometers have a “SET” button for this purpose).
Calibrate (or “zero”)
the Digital Inclinometer
on a Cab Frame Rail
in the direction that the
vehicle travels.

B4.4

Place the calibrated digital inclinometer against the front surface of the radar, so that the tool is held in the
same direction as it was on the rail. With the digital inclinometer resting as shown, verify that the
display shows 0° (± 1.1°) from vertical, when measured by an inclinometer set to zero on the vehicle’s frame.
Use a Torx T-20 screwdriver here to
adjust for the vertical alignment

IMPORTANT:
Do not adjust
this stand-off!!
NOTE: Complete the steps below only if a vertical adjustment is necessary.
B4.5

Use the Torx T-20 screwdriver to turn by hand the top‑left adjustment stand-off. During the adjustment, observe
the digital display on the inclinometer and turn the vertical alignment screw clockwise or counterclockwise
depending on the vertical direction (up or down) needed, until the reading is zero degrees.

B4.6

The radar is aligned vertically when the display is between -1.5° and 1.5°, however to achieve a more
precise alignment, adjust the vertical alignment screw until the digital alignment value is near zero (0°).
Note: The alignment process shown here is for Bendix alignment brackets. For other brackets, similar alignment
steps will be needed; consult the vehicle manual for full instructions.

B4.7

If used, be sure to remove the clip before returning the vehicle to service.

Call the Bendix Tech Team at 1‑800‑AIR‑BRAKE (1‑800‑247-2725), option 2 for troubleshooting assistance.

50

Appendix B

APPENDIX C - RADAR ALIGNMENT USING THE BENDIX® ALIGNMENT CLIP AND TOOL
Appendix C
Bendix FLR-20™ Radar Alignment
™

C Lateral Alignment Using The Bendix® Alignment Clip And Tool
This is the method to use for lateral alignment when a radar and/or bracket is replaced.
Tools needed: Bendix® alignment kit, steel clip, Torx T-20 screwdriver and a tape measure.
•

One of the Bendix® Alignment Tools part no: K065284 and K096579 — available from Bendix® parts outlets — are used.

The alignment procedure also requires a steel clip, part number K073087.

Steel Clip
(actual design may vary)

Alignment Tool
with Laser
Guide

K065284
Install Steel Clip
over FLR-20

Magnetic Feet
(3)
K096579
Shorter
Bar

ALIGNMENT TOOLS AVAILABLE

C1.1

Park the vehicle on a level floor. Air suspensions must be charged and stable. Install the steel clip supplied
over the radar sensor.

C1.2

Attach the alignment tool onto the clip using its magnetic feet. Inspect to make sure that the alignment tool is
approximately horizontal width-wise.

C1.3

Activate the lateral alignment laser light “on” switch. Place the tool into position for the first measurement.
(The tool will be reversed when the second measurement is made.)

Appendix C

51

Appendix C
Bendix FLR-20™ Radar Alignment
™

C Lateral Alignment Using The Bendix® Alignment Clip And Tool (Continued)
C1.4

Locate symmetrical points on the front of the vehicle that are at least 12 inches (30  mm) from the vehicle’s
center line (such as the tow hooks). Using a ruler or tape measure, record the distance from each side to the
laser light line.

LATERAL ALIGNMENT LEFT MEASUREMENT

NOTE: The technician must be careful during the laser positioning process to double-check the values measured on each
side of the truck. Be sure to check back and forth for each side of the radar sensor several times to ensure accuracy.
C1.5

Repeat the process for the opposite side, reversing the tool, so that the laser light points to the other side of
the vehicle.
The Whole
Tool is
Reversed for
the Second
Measurement

Lateral Alignment
Laser

Laser
Light Beam

C1.6 Compare the left and right distance measurements. A properly aligned radar sensor will have the same
measurement from each side. If these two dimensions are within 1/8" (3 mm), no alignment is necessary and
the technician can go to Step C1.10 to check the vertical alignment. If an adjustment is needed, follow the
instructions in C1.7-9 on page 53.

52

Appendix C

Appendix C
Bendix FLR-20™ Radar Alignment
™

C Lateral Alignment Using The Bendix® Alignment Clip And Tool (Continued)
NOTE: Complete these steps only if a lateral adjustment is necessary.
C1.7

With the Bendix alignment tool still in place, use the Torx® T-20 screwdriver to turn by hand the driver‑side
stand-off adjustment screw until the desired alignment is reached.

IMPORTANT:
Do not adjust
this stand-off!! Use a Torx T-20 screwdriver here to
adjust for the lateral alignment

C1.8

Re-measure the distances from symmetrical points located at least 12" from the center line of the vehicle.
Reverse the tool for each measurement, until the values are the same [within 1/8" (3 mm)].

C1.9

After the lateral alignment procedure is complete, if there is an active misalignment DTC (codes 55, 56,
or 57), clear the Bendix® Wingman® Advanced™ system Diagnostic Trouble Code (DTC) using the procedure
in Section 4.4: Clearing Diagnostic Trouble Codes (DTCs) and reset the alignment value by connecting the
vehicle to a PC with Bendix® ACom® Diagnostic Software and follow steps B4.4-20 to reset the alignment
value. (Also, see Appendix H.)

C1.10 IMPORTANT: Before returning the vehicle to service, check the vertical alignment using the procedure
outlined below.
C1.11 [The steel clip and alignment tool should already be in place. See C1.1-2.]
C1.12 Calibrate (or “zero”) the inclinometer on a horizontal section of the frame rail. Follow the manufacturer’s
instructions (typically digital inclinometers have a “SET” button for this purpose).
Calibrate (or “zero”) the Digital Inclinometer on a
Cab Frame Rail in the direction that the vehicle
travels.
Place the calibrated digital inclinometer onto the
surface of the tool, so that the tool is in the
same direction as it was on the rail. Verify
that the display shows 0° (± 1.5°) from vertical.
NOTE: Complete these steps only if a vertical adjustment is necessary.
C1.13 With the Bendix alignment tool still in place, use the screwdriver to turn
by hand the top‑left adjustment stand-off. See the Figure on the right.
During the adjustment, observe the digital display on the inclinometer
and turn the vertical alignment screw clockwise or counterclockwise
depending on the vertical direction (up or down) needed, until the
reading is near zero degrees.
C1.14 The radar is aligned vertically when the display is near zero (0°).
Note: The alignment process shown here is for Bendix alignment
brackets. For other brackets, similar alignment steps will be needed;
consult the vehicle manual for full instructions.

Use a Torx T-20 screwdriver here to
adjust for the vertical alignment

IMPORTANT:
Do not adjust
this stand-off!!

NOTE: The alignment process is complete after the vertical alignment has been checked (and adjusted, if
necessary.) You do not need to test-drive the vehicle.
Call the Bendix Tech Team at 1‑800‑AIR‑BRAKE (1‑800‑247-2725), option 2 for troubleshooting assistance.
Appendix C

53

APPENDIX D - DYNAMIC RADAR ALIGNMENT
Appendix D
Bendix FLR-20 Radar Dynamic Alignment Method
™

™

This procedure may be used in rare cases where the stored alignment value is
not available. The vehicle must have a Bendix™ Driver Interface Unit (DIU™)
with a software version 12.220 or above.
D Lateral Alignment Using The Dynamic Alignment Method
Use the flowchart B1 to be sure you are using the correct alignment procedure. This procedure is used in
the rare cases where a learned alignment value is not available. For example, in cases where a technician
erroneously resets the alignment value before recording the Learned Alignment correction value and direction.
D1.1

Tools needed: DIU (with software version 12.220 or above), and a Torx® T-20 screwdriver. The assistance of
another vehicle will be necessary, and an assistant in the cab of the vehicle with the driver.
The DIU’s software version can be seen in the top right-hand corner of the Volume screen. The Bendix DIU’s
Dynamic Alignment Screen is used to show a dynamic calculation of the alignment of the radar.

D1.2

To perform the inspection, the vehicle must be traveling behind a cooperative vehicle on a straight, level
length of highway. Obeying all traffic laws, follow the vehicle in the same lane at a speed greater than 35 mph
(56 kph). For the most accurate results, the distance between the vehicles must be between 50 and 300 feet
(15 to 91 meters), so the observed distance figure, displayed in the top left-hand corner of the display helps
the driver maintain the correct range. Verify that both vehicles remain in the middle of the lane during the test.
The radar determines the distance and alignment to the vehicle ahead, and, if needed, calculates an alignment
correction value, displayed on the screen.

D1.3

During the test, an assistant in the vehicle should observe where on the scale the triangle indicator shows the
alignment correction value. Because this is a dynamic measurement, the arrow will typically move through
a range of positions. Note the average position where the triangle points over a length of time. This value
gives the number of turns of the lateral adjust screw clockwise (CW) or counterclockwise (CCW), in order to
correct any misalignment present. See Figure below. The number of turns may require less than a full screw
turn, e.g. half way between 2 and 3 is 2.5 turns. The scale to the left of center shows when a clockwise (CW)
adjustment is needed, and numbers to the right are for counterclockwise (CCW) adjustments.
The indicator triangle will move
along the scale to show the
number and direction of turns to
make of the adjustment screw.

CCW = Counterclockwise

CW = Clockwise
Dynamic Alignment Screen

IMPORTANT:
Do not adjust this
stand-off!!
D1.4

Use a Torx T-20 screwdriver here to
adjust for the lateral alignment

Lateral alignment values less than 1.1 degrees from the center are acceptable and do not necessarily require
adjustment. (See the “OK” zone shown on the scale for this range).

Call the Bendix Tech Team at 1‑800‑AIR‑BRAKE (1‑800‑247-2725), option 2 for troubleshooting assistance.
54

Appendix D

APPENDIX E - TROUBLESHOOTING CHECKLIST
Appendix E
Troubleshooting Checklist
Detailed Scenarios and Tests

Record Driver’s Answers for
Follow-up with Bendix

Does the vehicle maintain its set speed when cruise control is switched on and
set?

Yes

No

_____________

Is the cruise control “set” icon displayed?

Yes

No

_____________

While following a forward vehicle within radar range and the cruise control
switched on and set, observe the following:
Is the “forward vehicle detected” icon displayed?
What color is the icon?
When the forward vehicle slows down, does the truck also slow down to
maintain the set distance?

Yes
No
_____________
Icon Color______________
Yes