NHTSA ID Number: 11000860
Manufacturer Communication Number: SD-29-50022
TSB/Document Date: 2024-06-04
Summary
Bendix
Fusion FLR-25 Radar Sensor service data
J1939 Signal: Error In Combination Vehicle Weight
(CVW) Gross Combination Vehicle Weight
U
15532045
237
13
Vin Mismatch With Vehicle
N
16712201
767
9
J1939 Signal: Electronic Transmission Control (ETC5)
Transmission Reverse Direction Switch Not Available
N
16712206
767
14
J1939 Signal: Missing Electronic Transmission
Control (ETC5) Message
N
16712211
767
19
J1939 Signal: Error In Electronic Transmission Control
(ETC5) Transmission Reverse Direction Switch
N
16715273
3839
9
J1939 Signal: Electronic Brake Control (EBC5)
Brake Temperature Warning Not Available
U
16715283
3839
19
J1939 Signal: Error In Electronic Brake Control
(EBC5) Brake Temperature Warning
U
Table 4A – Diagnostic Trouble Codes (DTCs), SPN, and FMI
SERVICE ACTION CODES AND THE RECOMMENDED SERVICE TO PERFORM
Service
Action Code
(From
Table 4A)
Table 4B: Service Action Codes and the Recommended Service to Perform
Recommended Service
(Bendix™ FLR-25™ Radar Sensors Only)
This DTC is a failure of the FLR-25 radar sensor. Replace the FLR-25 radar sensor.
A
Prior to replacing the FLR-25 radar sensor, perform the following:
• Clear the Bendix® Wingman® Fusion™ system Diagnostic Trouble Codes (DTCs) using the
procedure in Section 2.6: Clearing Diagnostic Trouble Codes (DTCs).
• Add the FLR-25 radar sensor to a compatible vehicle and test to determine if the error persists.
• If the error returns, replace the FLR-25 radar sensor.
This DTC is not a failure of the FLR-25 radar sensor. Do not replace the FLR-25 radar sensor.
Possible causes:
• This error will be triggered by Active Cruise with Braking (ACB) if not enough power train-related
input signals are available for the function to operate.
B
• It is a de-centralized error handling approach by ACB.
• Non-OE-specified components are installed in the CAN line (i.e. Electronic Driver's Log [EDL]).
Perform the following:
• Check if one of the signals is not available:
• ETC1:TransmissionShiftInProcess (SPN 574)
• ETC1:TransmissionOutputShaftSpeed (SPN 191)
• ETC2: TransmissionActualGearRatio (SPN 526)
Note: The system will not report newly active J1939 Diagnostic Trouble Codes (DTCs) until the engine has been
running for 15 seconds. Do not attempt to diagnose J1939 DTCs without the engine running.
Table 4B – Service Action Codes
23
Service
Action Code
(From
Table 4A)
Table 4B: Service Action Codes and the Recommended Service to Perform
Recommended Service
(Bendix™ FLR-25™ Radar Sensors Only)
This DTC is not a failure of the FLR-25 radar sensor. Do not replace the FLR-25 radar sensor.
Possible causes:
• These Diagnostic Trouble Codes (DTCs) result from incorrect ignition, battery supply voltage, or
wiring harness issues as measured at the FLR-25 radar sensor.
C
Review the following sections:
• 2.7: Ignition Voltage Too Low
• 2.7: Ignition Voltage Too High
• 2.7: Power Supply Tests
• 2.12: Troubleshooting Wiring Harnesses
Perform the following:
• Bendix® Wingman® Fusion™ system DTCs using the procedure in Section 2.6: Clearing
Diagnostic Trouble Codes (DTCs). If the error persists, continue to the next step.
• Verify the ignition supply voltage to the FLR-25 radar sensor is between 9 to 16 VDC.
• Visually check for damaged or corroded connectors.
• Visually check for damaged wiring.
• If the error returns, call the Bendix Tech Team at 1-800-AIR-BRAKE (1-800-247-2725), option 2.
This DTC is not a failure of the FLR-25 radar sensor. Do not replace the FLR-25 radar sensor.
Possible causes:
• The system receives an implausible signal (J1939 EBC2 Mean Front Axle) from an external ECU.
D
Perform the following:
• Clear the Fusion system DTCs using the procedure in Section 2.6: Clearing Diagnostic Trouble
Codes (DTCs). If the error persists, continue to the next step.
• Check the source of the signal to identify why the signal has an error.
• Check the source of the signal for trouble codes using the manufacturer’s diagnostic procedures.
This DTC is not a failure of the FLR-25 radar sensor. Do not replace the FLR-25 radar sensor.
E
Possible cause:
• Vehicles without external yaw rate sensor: the system receives an implausible signal (J1939 EBC2
Mean Front Axle) from an external ECU.
• Vehicles with external yaw rate sensor: the system receives an implausible signal (J1939 VDC2
Yaw rate) from an external ECU.
Perform the following:
• Clear the Fusion system DTCs using the procedure in Section 2.6: Clearing Diagnostic Trouble
Codes (DTCs). If the error persists, continue to the next step.
• Check the source of the signal to identify why the signal has invalid data in the J1939 message.
• Check the ABS for DTCs using the manufacturer’s diagnostic procedures. The ABS is the source of
the signal and must be investigated first.
• If the error returns, call the Bendix Tech Team at 1-800-AIR-BRAKE (1-800-247-2725), option 2.
This DTC is not a failure of the FLR-25 radar sensor. Do not replace the FLR-25 radar sensor.
Possible causes:
• These DTCs may arise from issues such as improper installation or radar blockage.
F
Perform the following:
• Clear the Fusion system DTCs using the procedure in Section 2.6: Clearing Diagnostic Trouble
Codes (DTCs). If the error persists, continue to the next step.
• Check for proper installation of the FLR-25 radar sensor. This DTC is commonly caused by the
FLR-25 radar sensor being installed backwards.
• Check for FLR-25 radar sensor obstruction. Clean dirt – or packed snow or ice – from the FLR-25
radar sensor if present.
• If the error returns, call the Bendix Tech Team at 1-800-AIR-BRAKE (1-800-247-2725), option 2.
Note: The system will not report newly active J1939 Diagnostic Trouble Codes (DTCs) until the engine has been
running for 15 seconds. Do not attempt to diagnose J1939 DTCs without the engine running.
Table 4B – Service Action Codes
24
Service
Action Code
(From
Table 4A)
Table 4B: Service Action Codes and the Recommended Service to Perform
Recommended Service
(Bendix™ FLR-25™ Radar Sensors Only)
This DTC is not a failure of the FLR-25 radar sensor. Do not replace the FLR-25 radar sensor.
Possible causes:
• The FLR-25 radar sensor is out of alignment.
G
Perform the following:
• Clear the Bendix® Wingman® Fusion™ system Diagnostic Trouble Codes (DTCs) using the
procedure in Section 2.6: Clearing Diagnostic Trouble Codes (DTCs). If the error persists, continue
to the next step.
• Physically check that the FLR-25 radar sensor is securely mounted in its original mounting location
with OE-specified hardware.
• Use Bendix® ACom® PRO™ Diagnostic Software to reset the alignment value using the procedure in
Section 2.12: Resetting the Radar Service Alignment.
• If the error returns, call the Bendix Tech Team at 1-800-AIR-BRAKE (1-800-247-2725), option 2.
This DTC is not a failure of the FLR-25 radar sensor. Do not replace the FLR-25 radar sensor.
M
Possible causes:
• The Collision Mitigation System (CMS) applied the brakes more than five (5) times in a power
cycle.
Perform the following:
• Clear the Fusion system DTCs using the procedure in Section 2.6: Clearing Diagnostic Trouble
Codes (DTCs).
• Review the operation of the Bendix® Fusion™ system with the driver.
This DTC is not a failure of the FLR-25 radar sensor. Do not replace the FLR-25 radar sensor.
Possible causes:
• The source of the J1939 message is producing a value that is out of range, in error, or not
supported.
Review the following sections:
• 2.10: J1939 Engine Communications Test Procedure.
N
Perform the following:
• Clear the Fusion system DTCs using the procedure in Section 2.6: Clearing Diagnostic Trouble
Codes (DTCs). If the error persists, continue to the next step.
• Check the source of the J1939 message to identify why it has invalid or missing data.
• Check the engine, engine retarder, and Antilock Braking System (ABS) for DTCs using the
manufacturer’s diagnostic procedures. Either the engine, engine retarder, or the ABS are the
source of the signal. The controller that broadcasts the J1939 message must be investigated first.
Some examples are gross vehicle weight and various engine torque signals.
• If the error returns, call the Bendix Tech Team at 1-800-AIR-BRAKE (1-800-247-2725), option 2.
This DTC is not a failure of the FLR-25 radar sensor. Do not replace the radar FLR-25 radar
sensor.
U
Possible causes:
• A fault occurred in the ABS controller causing the radar to not receive a proper message from the
ABS controller.
Perform the following:
• Clear the Fusion system DTCs using the procedure in Section 2.6: Clearing Diagnostic Trouble
Codes (DTCs). If the error persists, continue to the next step.
• Repair the ABS fault(s).
• Check the ABS fault history for reoccurring intermittent faults.
• If the error returns, call the Bendix Tech Team at 1-800-AIR-BRAKE (1-800-247-2725), option 2.
Note: The system will not report newly active J1939 Diagnostic Trouble Codes (DTCs) until the engine has been
running for 15 seconds. Do not attempt to diagnose J1939 DTCs without the engine running.
Table 4B – Service Action Codes
25
Service
Action Code
(From
Table 4A)
Table 4B: Service Action Codes and the Recommended Service to Perform
Recommended Service
(Bendix™ FLR-25™ Radar Sensors Only)
This DTC is not a failure of the FLR-25 radar sensor. Do not replace the radar FLR-25 radar
sensor.
Possible causes:
• This is an indicator that the FLR-25 radar sensor is not correctly receiving messages from the
Forward-looking Camera (FLC).
X
Perform the following:
• Clear the Bendix® Wingman® Fusion™ system Diagnostic Trouble Codes (DTCs) using the
procedure in Section 2.6: Clearing Diagnostic Trouble Codes (DTCs). If the error persists, continue
to the next step.
• Check for the presence of the Bendix™ FLC-20™ camera on the vehicle J1939 CAN line using the
roll call feature in Bendix® ACom® PRO™ Diagnostic Software (left side of the home screen).
• If the FLC-20 camera is not found, refer to SD-64-21024, Bendix® AutoVue® FLC-20™ Camera
Service Data Sheet, on B2Bendix.com for proper camera diagnostics.
• Check that the resistance between the public/vehicle CAN+ and CAN- is between 50 and 70 ohms
with the power off.
• If the error returns, call the Bendix Tech Team at 1-800-AIR-BRAKE (1-800-247-2725), option 2.
This DTC is not a failure of the FLR-25 radar sensor. Do not replace the FLR-25 radar sensor.
Possible causes:
• This is an indicator of an intermittent CAN failure. Refer to CAN line diagnostics for further
troubleshooting steps.
• The Fusion system is indicating an error in the messages on the CAN bus.
Y
Perform the following:
• Clear the Fusion system DTCs using the procedure in Section 2.6: Clearing Diagnostic Trouble
Codes (DTCs). If the error persists, continue to the next step.
• Check the public/vehicle CAN connections at the camera and the FLR-25 radar sensor.
• Check that the resistance between the public/vehicle CAN+ and CAN- is between 50 and 70 ohms
with the power off.
• If the error returns, call the Bendix Tech Team at 1-800-AIR-BRAKE (1-800-247-2725), option 2.
Note: The system will not report newly active J1939 Diagnostic Trouble Codes (DTCs) until the engine has been
running for 15 seconds. Do not attempt to diagnose J1939 DTCs without the engine running.
Table 4B – Service Action Codes
26
2.6 CLEARING DIAGNOSTIC
TROUBLE CODES (DTCS)
Power Supply Pin Codes (4.5)
1. Connect a current version of the Bendix® ACom®
PRO™ Diagnostic Software to the vehicle.
2. Once the roll call is complete, you can view active and
inactive Diagnostic Trouble Codes (DTCs) and clear
DTCs from all vehicle components or solely from a
selected Bendix controller.
3. To read and clear DTCs from all vehicle components
at the same time, select the vehicle on the roll call and
clear the DTCs by selecting “Clear Faults.”
4. To read and clear DTCs from a specific Bendix
Electronic Control Unit (ECU), select the Bendix ECU
on the roll call and select “Clear Faults.”
For assistance with ACom PRO Diagnostic Software,
contact the Bendix Tech Team at 1-800-AIR-BRAKE
(1-800-247-2725, option 2, option 2).
2.7 TROUBLESHOOTING DIAGNOSTIC
TROUBLE CODES: POWER SUPPLY
IGNITION VOLTAGE TOO LOW
Measure the ignition voltage under load. Ensure that the
ignition voltage is greater than 10 VDC (Volts DC). Check
the vehicle battery and associated components. Inspect
for damaged wiring, damaged or corroded connectors,
and loose connections. Check the condition of the fuse.
IGNITION VOLTAGE TOO HIGH
Measure the ignition voltage. Ensure that ignition voltage
is not greater than 16 VDC. Check the vehicle battery
and associated components. Inspect for damaged wiring,
damaged or corroded connectors, and loose connections.
POWER SUPPLY TESTS
1. Take all measurements at the radar sensor harness
connector.
2. Place a load (i.e. 1157 stop lamp) across the supply
voltage and ground connection. Measure the voltage
with the load. The voltage on pin 1 to ground pin 8
should measure between 10 to 16 VDC.
3. Check for damaged wiring, damaged or corroded
connectors, and loose connections.
4. Check the condition of the vehicle battery and associated components. Ensure the connection to ground is
secure and tight.
(Looking into the Front of the Harness Connector)
Pin #
Description
1
Ignition Voltage (+)
2
Not Used
3
Not Used
4
J1939 CAN LOW
5
Not Used
6
Not Used
7
J1939 CAN HIGH
8
Ground (-)
Table 5 – Harness Connector Pins
2.8 SERIAL DATA (J1939)
COMMUNICATIONS LINK
Check for a loss of communications between the Bendix®
Fusion™ FLR-25™ Radar Sensor, the Antilock Braking
System (ABS) controller, the engine ECU, and other
devices connected to the J1939 link. Check for damaged
or reversed J1939 wiring. Check for corroded or damaged
connectors and loose connections. Using procedures
described by the vehicle manufacturer, verify the presence
of the engine ECU and the ABS controller on the J1939
link. This can be done using the roll call function the ACom
PRO Diagnostic Software.
Verify the engine ECU configuration. Check for other
devices inhibiting J1939 communications.
NOTE: The FLR-25 Radar Sensor will not report newly
active J1939 DTCs until the engine has been running for
15 seconds. Do not attempt to diagnose J1939 DTCs with
the engine running.
5. Using the procedures described by the vehicle
manufacturer, check the alternator output for excessive
noise.
27
2.9 ENGINE COMMUNICATIONS
(J1939) TEST PROCEDURE
NOTE: Remove all non-factory-equipped components
– such as Electronic Drivers' Logs (EDLs), GPS, and
telematic systems – prior to testing communications.
The Bendix® Fusion™ FLR-25™ Radar Sensor requires
several J1939 messages from the engine Electronic Control
Unit (ECU) to control the engine and retarder torque for
distance control and braking. The Fusion system will set a
Diagnostic Trouble Code (DTC) if one of these messages
is not present.
Use the engine manufacturer’s diagnostic test procedures
to verify that there are no errors present in the engine that
may prevent the Fusion system from controlling the engine
or retarder torque.
2.10 J1939 TROUBLESHOOTING
PROCEDURE
1. Take all measurements at the harness connector unless
otherwise indicated.
3. Check for corroded or damaged wiring connector
problems such as opens or shorts to voltage or ground.
If the connector terminals are corroded, this may be
an indication of water intrusion into the wiring system
and possibly into the radar sensor. Replacement of the
entire harness is recommended. If the terminals of the
radar sensor are corroded, replacement of the radar
sensor is recommended.
4. Check for other J1939 devices which may be inhibiting
J1939 communication. The service technician should
consult the vehicle manufacturer’s procedures for
other J1939 troubleshooting procedures. The device’s
power should be removed and measurements made at
the ECU pins for shorts to ground and power pins and
resistance between the J1939 HIGH or J1939 LOW
input circuits.
5. Unplug the radar sensor. With the ignition switch off,
measure the resistance (ohms) using a multimeter
between harness pins 4 and 7. The reading should be
approximately 60 ohms. If it is not, the vehicle wiring
should be investigated using procedures described by
the manufacturer.
Do not insert probes into the back of the connector as
this will damage the seal around the wire.
2.11 TROUBLESHOOTING
WIRING HARNESSES
Do not insert any probe into the pin on the mating
connector of the radar sensor that is greater than
the dimension of the mating connector. Damaged
connector pins will require the replacement of the
harness.
All wire harness connectors must be properly seated to
maintain environmental seals. Push the mating connector
until it seals with a click. When replacing an FLR-25 radar
sensor, check that the wire harness connector is free of
corrosion before plugging it into a new radar sensor. Check
for corroded or damaged wiring connector problems such
as opens or shorts to voltage or ground.
2. Check for damaged or reversed J1939 wiring.
If the J1939 HIGH or J1939 LOW wiring circuits are
damaged, such as shorting together, the entire J1939
link will be lost. The problem may be intermittent,
enabling the J1939 link to sometimes operate normally.
If this occurs, multiple DTCs will be logged in multiple
engine and vehicle controllers.
If the J1939 HIGH and J1939 LOW wiring circuits are
reversed, communication over the entire J1939 link will
not be lost. Only those devices that are outside of the
problem point from other devices will not receive, or be
able to transmit, data messages.
28
If the connector terminals are corroded, this may be an
indication of water intrusion into the wiring system and
possibly into the radar sensor. Replacement of the entire
harness is recommended. If the terminals of the radar
sensor are corroded, replacement of the radar sensor is
recommended
2.12 RESETTING THE RADAR
SERVICE ALIGNMENT
1. Connect a current version of Bendix® ACom® PRO™
Diagnostic Software and select “Bi-Directional” from
the main menu. Select the Bendix radar sensor and
select "Radar Service Alignment."
2. Select "Start" to begin the radar service alignment
test. See Figure 7.
Figure 8 – Bendix® ACom® PRO™ Screen Showing the
Configuration Number
3.2 BENDIX FUSION SYSTEM
DIAGNOSTIC TROUBLE CODE
(DTC) SELF-CLEARING
1. Connect a current version of the ACom PRO
Diagnostic Software to the vehicle.
Figure 7 – Bendix® ACom® PRO™ Radar Service Alignment
3.0 OTHER SYSTEM FEATURES
3.1 READING BENDIX FUSION
SYSTEM KEY INDICATORS
®
™
1. Connect a current version of the ACom PRO
Diagnostic Software key system indicators from the
roll call. Key Electronic Control Unit (ECU) indicators
will be shown at the bottom left of the screen below
the roll call. Some information shown in this includes
the make, model, serial number, software version,
etc.
2. Additional ECU indicators can be found by selecting
“Bi-Directional” from the main menu. Select the Bendix
controller and the controller-specific configuration
option in the populated menu.
For assistance with the ACom PRO Diagnostic Software,
contact the Bendix Tech team at 1-800-AIR-BRAKE
(1-800-247-2725, option 2, option 2).
2. Once the roll call is complete, you can view active
and inactive DTCs and clear DTCs from all vehicle
components or solely from a selected Bendix
controller.
3. To read and clear DTCs from all vehicle components
at the same time, select the vehicle on the roll call and
clear the DTCs by selecting “Clear Faults.”
4. To read and clear DTCs from a specific Bendix ECU,
select the Bendix ECU on the roll call and select
“Clear Faults.”
3.3 FOLLOWING DISTANCE
ADJUSTMENT SWITCH (OPTIONAL)
If the vehicle is equipped with the following distance
adjustment switch and the following distance does not
change after an adjustment is made, the switch, wiring,
or a controller on the vehicle should be checked using
the diagnostic procedures described by the vehicle
manufacturer. The radar sensor receives the driver’s
desired following distance on the J1939 data communication
link from a controller on the vehicle. No DTC will be set
if the vehicle is not equipped with a following distance
adjustment switch. Refer to Table 6 for further information
on configuration settings.
29
3.4 CONFIGURING BENDIX® FUSION™ SYSTEM FOLLOWING DISTANCE ALERTS (FDA)
Medium
Speed
Audible Alert
(sec.)
Fast
Audible
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TSB/Document ID: SD-29-50022
Replacement Service Bulletin Number:
MFR Communication Date: 2024-05-14
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL
MFR Component System:
MFR Component Subsystem:
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