No

_____________

With engine cruise “off” and a forward vehicle present, does the audible alert
become faster as the truck moves closer to the forward vehicle?

Yes

No

_____________

Yes
Yes
Yes
Yes
Yes

No
No
No
No
No

_____________
_____________
_____________
_____________
_____________

Yes

No

_____________

Yes

No

_____________

Yes

No

_____________

Yes
Yes

No
No

_____________
_____________

With cruise control switched on and set, when the forward vehicle slows
moderately or cuts in front of the truck and slows, did you observe any of the
following conditions?
Does the vehicle slow and Advanced maintain the following distance?
Is the engine throttle reduced?
Is the engine retarder applied?
Are foundation brakes applied?
Are there Diagnostic Trouble Codes (DTCs) logged?
Does the truck proceed toward the forward vehicle without a following
distance alert or braking intervention?

With cruise control engaged, and while following a vehicle ahead in gentle
curves (assuming a 3 to 3.5 second following distance):
Does Advanced continue to follow the vehicle through the curves following
at a constant distance?
Does the truck proceed toward the forward vehicle without a following
distance alert or braking intervention?
With cruise engaged, when your vehicle passes a slower vehicle on the left or
right on a straight or slightly curvy road:
Does Advanced ignore the vehicle you are overtaking?
Does it give a following distance alert?

Appendix E

55

Appendix E
Troubleshooting Checklist
Detailed Scenarios and Tests
With cruise engaged, and a faster vehicle passes your vehicle on the left or
right on a straight or slightly curvy road:
Does your vehicle throttle up and try to keep pace with the faster moving
vehicle?
Does it give a following distance alert?
With cruise control engaged, if the vehicle ahead slows moderately or cuts in
front of your truck and slows down:
Does your vehicle slow and Advanced maintain the following distance?
Is the engine throttle reduced?
Is the engine retarder applied?
Are the foundation brakes applied?
Are there Diagnostic Trouble Codes (DTCs) logged?
Does your truck proceed toward the forward vehicle without a following
distance alert or braking intervention?

What version of Bendix® ABS and Bendix® Wingman® Advanced™ system is
installed on the vehicle? See Section 4.21: Reading the System Software Version.

Record Driver’s Answers for
Follow-up with Bendix

Yes

No

_____________

Yes

No

_____________

Yes
Yes
Yes
Yes
Yes

No
No
No
No
No

_____________
_____________
_____________
_____________
_____________

Yes

No

_____________

___________________________

___________________________
___________________________

What are the key system indicators?
See Section 5.1: System Key Indicators.

___________________________
___________________________
___________________________

Call the Bendix Tech Team at 1-800-AIR-BRAKE (1-800-247-2725), option 2
Monday through Thursday, 8:00 a.m. – 6:00 p.m., and Friday, 8:00 a.m. – 5:00 p.m. ET
for troubleshooting assistance.

56

Appendix E

APPENDIX F - DRIVER INTERFACE UNIT (DIU): DISPLAYS AND ALERTS
Appendix F
Bendix™ Driver Interface Unit (DIU™): Displays & Alerts

F1 Operator Interface
The Bendix® Wingman® Advanced™ system is either integrated into the vehicle's dash or console, or uses the
Bendix™ Driver Interface Unit (DIU™) to communicate with the driver. (For integrated systems, see the vehicle
operator’s manual for more information.)
This Section describes the functions of the DIU. The DIU mounts in, or on, the vehicle dash and provides the
interface between the driver and the Advanced system. The DIU provides visual and audio warnings to the
driver and accepts input from the driver through the “Up”, “Down” and “OK” buttons.
The DIU contains an internal speaker to provide audible warnings, 2 LED arrays (one each in yellow and red),
a single orange and blue LED and an LCD screen for visual warnings, and a light radar sensor to distinguish
between day and night conditions.

F1.1 Start-Up Mode
At initialization, the DIU executes self-test routines during which the following screens are displayed and all
LEDs are activated (power-on bulb check) for approximately three (3) seconds. If configured, a power-up
tone is also sounded.
Three Red LEDs
Illuminated
All Yellow LEDs
Illuminated

Buttons

Single Blue
LED Illuminated
Single Orange
LED Illuminated
(No LEDs
Illuminated)

(No LEDs
Illuminated)

(No LEDs
Illuminated)

Wingman®

Advanced

A Collision Mitigation
Technology by
Bendix

NOTE:
Wingman® Advanced
Uses Foundation Brakes

NOTE:

Read Operator's Manual
before using

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

57

Appendix F
Bendix™ Driver Interface Unit (DIU™): Displays & Alerts
When the initialization sequence is complete, the following screen is displayed for approximately three (3)
seconds to indicate the features available to the driver.

(No LEDs
Illuminated)

Bendix

Wingman ACB
Wingman Adv.

Next, the Bendix™ Driver Interface Unit (DIU™) will enter normal operation. Under normal operation, the
screen is:

(No LEDs
Illuminated)

If the Bendix® Wingman® Advanced™ system goes into self-test mode, the DIU may briefly display the “Bendix
Self-Test” screen. Also, the audible distance alerts will activate, followed by a screen indicating that the selftest has run. Below left is the screen that will be briefly displayed if the self-test runs and passes. Below
right is the screen that will be briefly displayed if the self-test runs and fails. If the self-test fails, a Diagnostic
Trouble Code (DTC) will be set. The driver should turn off the vehicle, wait 15 seconds and then turn it
back on again. If the problem persists, a qualified technician will be necessary for troubleshooting. See the
“Power-Up Self-Test” in this service data sheet Section 3.1: Troubleshooting Basics for further information.

Single Yellow LED
Illuminated

Bendix

Bendix

Self Test

(Followed
by a Single
Orange
LED
Illuminated)

Self Test Failed

F1.2 Menu Operation
Pressing the “OK” button at any time will enter the “Menu Operation Mode”. The following selections will
appear in a scrollable window. Some items may not appear if the feature is not configured or not allowed as
shown below.
• Volume
• Dist. Setting (Distance Setting)
• Dist. Units (Distance Units)
• US/Metric
• Brightness
• System Status
• Diag. Display (Diagnostic Display)
• Demo (Demonstration. Note: Demo is available only when vehicle is not moving)
The desired menu item is highlighted using the up (
) or down (
with the “OK” button. The following sections describe each menu item.

) arrow buttons and selected

Call the Bendix Tech Team at 1‑800‑AIR‑BRAKE (1‑800‑247-2725), option 2 for troubleshooting assistance.
58

Appendix F

Appendix F
Bendix™ Driver Interface Unit (DIU™): Displays & Alerts

F1.3 Volume
Selecting “Volume” from the main menu displays the following screen:

(No LEDs
Illuminated)

Use the up (
menu item.

)/down (

Volume

123.4

Software
Version

) arrow buttons to change the volume. Pressing the “OK” button exits this

The modified volume setting will be retained through ignition cycles unless configured not to do so. If not
configured, the volume setting will default to 100% on each new ignition cycle.
NOTE: The Bendix™ Driver Interface Unit (DIU™) can be configured to limit the minimum volume setting that
the driver can select. The bar shown above always represents the adjustable range based on minimum and
maximum values. For example, if the minimum value is set to 50% (midpoint between lowest (70 ± 3dB) and
highest (89 ± 3dB) audio levels, the bar represents an adjustable range from 50% (approx. 80dB) to 100%
(approx. 89dB). Once the minimum (or maximum) has been reached, a message will be shown indicating
that further adjustment is not allowed (e.g. “Minimum volume reached”). The step change per button press
is approximately 2dB.

F1.4 Dist. Setting (Distance Setting)
On systems where changes are permitted, the “Distance Setting” option from the main menu will adjust the following
distance that the Bendix® Wingman® Advanced™ system will attempt to maintain while in the following distance
mode. Distance Settings 1, 2, 3, and 4 will have different meanings based on the configuration chosen by the user
in Bendix® ACom® Diagnostic Software. Generally, 4 relates to the farthest distance setting available and 1 relates
to the closest distance setting available. In many of the Advanced configurations available in ACom, two or more
distance settings may be made equivalent to one another.
For more information on user configurations available through the Bendix ACom Diagnostic Software, see Section 5.4:
Configuring Bendix Wingman Advanced System Following Distance Alerts in this Service Data sheet for further information.

Selecting “Dist. Setting” from the main menu displays the following screen:

(No LEDs
Illuminated)

Text
Here*

* Text may vary
depending on the
system installed

F1.5 Dist. Units (Distance Units) (See also F1.6 for metric units)
From the “Dist. Units” menu item, the user may choose to have the following distance from the forward vehicle
displayed in either seconds or feet. By default, this item is set to seconds. If the user selects feet, the DIU will
display the approximate distance from the bumper to the selected forward vehicle in feet. If the user selects
seconds, the DIU will display the approximate distance from the bumper to the selected forward vehicle in seconds.
NOTE: Following distance in seconds is calculated based on the current speed of the Bendix Wingman Advanced
System‑equipped truck, and the distance, in feet, away from the selected forward vehicle. For instance, if the
selected forward vehicle is 88 feet (27 m) from the bumper of the Bendix Wingman Advanced System-equipped
truck, and the Bendix Wingman Advanced System‑equipped truck is traveling 60 mph (97 kph), then the following
distance in seconds would be 1.0 seconds because a truck traveling 60 mph (97 kph) can travel 88 feet (27 m)
in one (1) second.
Call the Bendix Tech Team at 1‑800‑AIR‑BRAKE (1‑800‑247-2725), option 2 for troubleshooting assistance.
Appendix F

59

Appendix F
Bendix™ Driver Interface Unit (DIU™): Displays & Alerts

F1.6 US/Metric
From this menu item, the user may select whether English or Metric units are displayed. For instance in
“metric” mode, the following distance is shown in meters. In “US” mode, the following distance is shown in feet.

F1.7 Brightness
Selecting Brightness from the main menu displays the following screen:

(No LEDs
Illuminated)

Brightness

The driver uses the up (
)/down (
) arrow buttons to change the LCD backlighting, LED brightness and
button backlighting. Pressing the OK button exits this menu item.
The light sensor reading determines whether the current cab lighting mode is bright (day) or dark (night).
When the light mode is bright, any brightness adjustment made by the driver is applied to only the bright
mode setting. Likewise, when the light radar sensor sets the light mode to dark, any brightness adjustment
made by the driver is applied to only the dark mode setting. This functionality allows the driver to adjust the
brightness setting for the two cab lighting conditions after which the Bendix™ Driver Interface Unit (DIU™) will
automatically toggle between the two settings based on the light radar sensor’s input. Both the bright mode
setting and the dark mode setting are stored across power cycles.
NOTE: The DIU does not allow the brightness control to completely shut off the LEDs. DIU units without a
light sensor will use signals from the vehicle’s J1939 CAN bus to determine and configure the day and night
setting

F1.8 System Status
This screen shows the configured features of the system and their current operational status (i.e., “Failed”
or “OK”). The failed status means that some system malfunction is preventing the feature from properly
operating and that the feature is not available for use by the driver at this time. Pressing “OK” exits this menu
item.

(No LEDs
Illuminated)

Bendix

Wingman ACB
Wingman Adv.

OK
   OK

F1.9 Diagnostics
Selecting Diagnostics from the main menu displays any active Bendix® Wingman® Advanced™ system
Diagnostic Trouble Code (DTC) conditions [including SAE standard diagnostic codes called J1939 SPNs
(Suspect Parameter Numbers) and J1939 FMIs (Failure Mode Identifiers)] that may be present in the DIU and
radar sensor. The following is a typical screen displayed in this mode when an active DTC is present:

(No LEDs
Illuminated)

DIU DIAGNOSTICS
SPN:00886 FMI:012

Call the Bendix Tech Team at 1‑800‑AIR‑BRAKE (1‑800‑247-2725), option 2 for troubleshooting assistance.
60

Appendix F

Appendix F
Bendix™ Driver Interface Unit (DIU™): Displays & Alerts

F2.0 Driver Demonstration Mode
Selecting Demo from the main menu starts a demonstration mode that shows the various lights, display
screens, and sounds produced by the Bendix™ Driver Interface Unit (DIU™) – along with a brief explanation
of their meaning – for the configured features. Pressing the down (
) arrow button advances through the
screens. The up (
) arrow button has no functionality in this mode. The mode may be exited at any time
by pressing the OK button.
NOTE: This mode can only be entered while the vehicle is not moving. Also, while in the demonstration
mode, if the vehicle begins to move, the demonstration mode terminates.
If a screen is associated only with a configurable feature, and that feature is not configured, then that screen
will not be shown in the demonstration mode.
The screens presented to the driver in the demonstration mode are shown with the following text: “Error!
Reference source not found.”

F3.0 Following Distance Alerts (FDAs)
One of the features of the Bendix® Wingman® Advanced™ system is the Following Distance Alert (FDA). A
proprietary system combining vehicle speed, forward vehicle speed, distance, and driving scenario, FDAs are
used to provide the driver with distance alerts which are intelligent, in that they will give appropriate distance
alerts for the given situation. They alert the driver to objects far ahead in highway and country road driving
situations, while not over-alerting in dense city traffic.
The radar sensor uses the DIU to communicate the FDA alerts to the driver. This system can be configured
through a current version of Bendix® ACom® Diagnostic Software, for use by a fleet as a driver training tool
with or without coordinating the data made available by the Bendix Wingman Advanced System. In addition
to being a reminder of when a driver may be dangerously close to the vehicle ahead, the following distance
alerts may also be configured to reinforce safe following distance habits taught by the fleet.
The FDA is based on the following interval between the host vehicle and the object ahead. In other words,
this is the time required by the host vehicle to travel forward and reach the object’s current location. With the
exception of the volume, the FDA may not be adjusted by the driver through the DIU. A qualified technician
must connect to the vehicle through the diagnostic port and run Bendix ACom Diagnostic Software, in order
to change the configuration. The volume can not be turned all the way down, but other adjustments may be
made by the fleet. See Section B1.3 for more details on volume adjustment.
The FDA system is intended only to alert the driver about following distance. For more information on alerts
for forward objects with high relative velocities and sudden decelerations, see Section B4.0: Impact Alert.
Only objects detected in the vehicle's lane, traveling in the same direction, are considered valid objects for the
FDA. For more information on stationary objects, see Section B5.0: Stationary Object Alert.
See Section 5.4: Configuring Bendix Wingman Advanced System Following Distance Alerts.
Call the Bendix Tech Team at 1‑800‑AIR‑BRAKE (1‑800‑247-2725), option 2 for troubleshooting assistance.

The driver is always responsible for the control and
safe operation of the vehicle at all times. The Bendix®
Wingman® Advanced™ system does not replace the
need for a skilled, alert professional driver, reacting
appropriately and in a timely manner, and using safe
driving practices.

Appendix F

61

Appendix F
Bendix™ Driver Interface Unit (DIU™): Displays & Alerts

F3.1 Object Detected
When there is no valid object detected and no other high priority alert is displayed, the Bendix™ Driver Interface
Unit (DIU™) will stand by with the following screen:

(No LEDs
Illuminated)

When a valid object is detected, and is outside the range of the first level of alert, and no other higher priority
alert is displayed, the DIU will display the following and no audio tones will be issued. The distance to the
object will be displayed in large characters in the white space at the center of the screen (not shown) in
seconds, feet, or meters, depending on the menu-selected preferences. By default, seconds will be displayed.

(No LEDs Illuminated)

Object Detected

F3.2 Following Distance Alert (FDA) Level I (Slow audible two-tone alert/single LED illuminated)
When FDA Level I is issued, the following distance to the object/vehicle ahead has been reduced to the
distance determined in the current configuration for FDA Level I. The DIU will begin to give the driver audio
and visual alerts for as long as the forward vehicle is in this zone and traveling at the same speed or slower.
The DIU will not display following distance units while in an FDA Level. For FDA Level I, the audible alert will
be a single repeating tone, and the visual alert is a single yellow LED and a screen with the vehicles slightly
closer as shown below.

Object Detected

Single Yellow LED
Illuminated

F3.3 Following Distance Alert (FDA) Level II (Medium audible two-tone alert/two LED’s illuminated)
The DIU will give the driver audio and visual alerts for as long as the object/vehicle ahead is in this zone and
traveling at the same speed or slower. The DIU will not display following distance while in an FDA Level. For
FDA Level II, the audible alert will be a repeating double tone, and the visual alert is two yellow LEDs and a
screen with the vehicles closer as shown below.

Object Detected

Two Yellow LEDs
Illuminated

Call the Bendix Tech Team at 1‑800‑AIR‑BRAKE (1‑800‑247-2725), option 2 for troubleshooting assistance.
62

Appendix F

Appendix F
Bendix™ Driver Interface Unit (DIU™): Displays & Alerts

F3.4 Following Distance Alert (FDA) Level III (Fast audible two-tone alert/three yellow LEDs illuminated)
The Bendix™ Driver Interface Unit (DIU™) provides the driver with audio and visual alerts for as long as the
vehicle ahead is in this zone and traveling at the same speed or slower. This is the closest and most urgent
Following Distance Alert.
The DIU will not display following distance while in an FDA Level. For FDA Level III, the audible alert will be
a continuously repeating tone, and the visual alert is three yellow LEDs and a screen with the vehicles close
as shown below:
All Yellow LEDs
Illuminated

Object Detected

All five states of the FDA system can be seen together below.

(No LEDs Illuminated)

(No LEDs Illuminated)

(No Tone)

Object Detected

Object Detected

FDA Level I:
Single Yellow
LED Illuminated

Object Detected

FDA Level II:
Two Yellow
LEDs Illuminated

FDA Level III :
All Yellow LEDs
Illuminated

Object Detected

(No Tone)

(Single
Repeating
Double Tone)