10
Narrowing Down the Problem (1.2)
Questions
Next Steps
Has the system worked without
problems in the past but is not
working as expected now?
This is a good indication that something has changed – such as misalignment of the radar
sensor. Review the following questions with the driver to further diagnose the problem.
Has the radar sensor been
changed recently?
If so, the new radar sensor may be incompatible with the vehicle. In addition, check any
system Diagnostic Trouble Codes (DTCs) with Bendix
®
ACom
®
PRO
™
Diagnostic Software.
Read Section 2.5:
Diagnostic Trouble Codes.
Did the radar sensor currently on
the vehicle come from another
vehicle?
The radar sensor may be incompatible with the new vehicle. Follow Section K1.15:
Radar
Sensor Interchangeability
procedure and check system DTCs with Bendix ACom PRO
diagnostic software. Read Section 2.5:
Diagnostic Trouble Codes.
With cruise control set, does the
system consistently apply the
foundation brakes when a forward
vehicle slows?
This is normal operation. Continue asking the driver questions to determine if the radar
system interventions are not the expected Bendix
®
Wingman
®
Fusion
™
system behavior. If
the radar system interventions are not typical, the radar sensor may be misaligned.
• Inspect the radar mounting. A solid mounting surface is necessary in order to hold the
alignment. If the bumper or mounting cross-member is damaged, replace it first, then
align the radar sensor.
• Appendix B1
- Go to
Appendix B1
and use the flowchart to find out the procedure
needed. Follow the actions directed in the procedure and align the radar.
• Appendix B4
- Check the vertical alignment and adjust if needed.
The service technician will need to check trouble codes as well. Read Section 2.5:
Diagnostic Trouble Codes.
Does a DTC seem to occur when
driving through the desert or in
barren areas (no road signs, trees,
or vehicles)?
In normal operation, the active cruise control with braking feature of the Bendix Wingman
Fusion system may indicate a DTC if it hasn’t detected a metallic object after a pre-
determined period. This is rare, but most likely to occur when driving in deserts or barren
areas. If the system does set a DTC, the Bendix Wingman Fusion system provides a
visible warning to the driver. In addition, the vehicle will also drop out of cruise mode,
providing an audible and/or visual warning to the driver as well. The driver must pull off the
road and cycle the ignition before the vehicle’s cruise control can be used.
Does the system seem to
disengage after an automatic
braking event?
This is normal operation. The driver must set or "resume" the cruise control once again to
regain the following distance function.
Does cruise control disengage
sometimes when the brakes come
on and not at other times?
This is normal operation. When traveling with lightly loaded trailers, or “bobtail”, the active
cruise control with braking feature of the Bendix Wingman Fusion system may continue to
function even after an automatic brake application. No driver input is needed.
Does the connector or wiring
appear damaged?
Wires can become corroded if the radar sensor is not plugged in properly. Clean the
connectors on the wire harness, as well as the radar sensor, and reattach. If wires are
chafed, replace the wire harness. Also, check for trouble codes.
Read Section 2.5:
Diagnostic Trouble Codes,
and
Section 2.12:
Troubleshooting Wiring Harnesses
.
Does the system generate a DTC
going down a grade when using
ACB (Active Cruise-control with
Braking) to slow the vehicle, but the
code goes away later?
This is normal operation. The active cruise control with braking feature of the Bendix
Wingman Fusion system is not intended to be used on grades. Verify there are no DTCs.
Proper downgrade driving techniques should be used.
Read Section 2.5:
Diagnostic Trouble Codes
.
Does the radar sensor have
noticeable damage beyond normal
discoloration or surface scratches?
The radar sensor and bracket are very durable. However, if the radar sensor housing or
cover is cracked or broken, immediately look for trouble codes via Bendix ACom PRO
diagnostic software and replace the damaged radar sensor. Read Section 2.5:
Diagnostic
Trouble Codes
, and Appendix A3:
Radar Sensor Mounting Clearance
.
Call the Bendix Tech Team at 1-800-AIR-BRAKE (1-800-247-2725), option 2, for troubleshooting assistance.
Table 2 – Narrowing Down the Problem (Pages 9–10)
