BENDIX Wingman FLR20, Service Data

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3.2 NARROWING DOWN THE PROBLEM
Use the questions found in Table 3.2 below to help assess if the Bendix
® Wingman ® Advanced ™
system is not performing
correctly. Be sure to have a thorough understanding of the system’s normal behavior; this will reduce the troubleshooting
time. The table provides a guide to basic troubleshooting questions and possible corrective actions. Items
in Italics
cross-reference to the service procedures in this manual to repair the condition described.
If Bendix Tech Team assistance is needed, prior to calling 1-800-AIR-BRAKE (1-800-247-2725, option 2), complete the
Troubleshooting Checklist (
See Appendix E
), to help reduce the time needed to troubleshoot the system.
Narrowing Down the Problem (3.2)
Questions Next Steps
Blocked Radar Sensor Issues
Is mud, ice, or snow covering the radar
sensor?
Is anything blocking the view of the radar
sensor?
Clean the radar sensor front surface immediately. Remove anything blocking the
radar sensor then power cycle and read any remaining trouble codes.
Read Section 4.3:
Diagnostic Trouble Codes
.
Read Appendix A3:
FLR20 Radar Sensor Mounting Clearance
.
If the vehicle's cruise control is set and the radar sensor is blocked by ice,
snow, mud, tampering, etc. so that it cannot "see" a forward vehicle, Wingman
Advanced may log a diagnostic trouble code (DTC).
After the blockage is removed, the DTC will clear automatically when the vehicle’s
ignition is cycled.
Add a visual check of the radar sensor for blockage to the driver’s pre-trip
inspection checklist.
Potential False Warnings
Do false alerts seem to happen in
construction zones or going under bridges?
Several road scenarios have a tendency to cause false warnings, including
construction zones and bridges. Unless these false warnings are frequent, the
system is likely reacting normally. The driver should not set the cruise control in
construction zones. If driver complaints persist, continue asking questions to more
narrowly defi ne the driving condition presenting the problems. Review proper
operating conditions in the operator's manual.
Mounting Problems
Is the radar sensor mounting location
(bumper or cross-member) damaged?
• Does the system seem to not "see" as far as
it “used to”, or warn on many more overhead
bridges/signs than previously?
Re-align the radar sensor vertically and laterally. Use the following procedures:
•
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 fi rst, then align the radar sensor.
• Appendix B1 - Go to Appendix B1 and use the fl owchart to fi
nd 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.
Does the mounting bracket look damaged or
tampered with?
Other than expected surface scratches or some discoloration over time, there
should be no visible damage to the radar sensor bracket assembly. If so, realign
the radar sensor vertically and laterally. If radar sensor alignment can not be held in
place, the bracket assembly must be replaced. Verify the bumper is not damaged.
•
Check the Vertical Alignment (6.6) and adjust if needed.
• Check the Lateral Alignment (6.8) and adjust if needed.
The Radar Sensor Mounting - The radar sensor needs a solid mounting surface
in order to hold the alignment. If the bumper or mounting cross-member is
damaged, replace it fi rst, then align the radar sensor.
Other Questions
Has the system worked properly in the past
and is not working correctly now?
This is a good indication that something has changed; review the questions listed
above 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 trouble codes with Bendix
®
ACom
®
Diagnostics software.
Read Section 4.3:
Diagnostic Trouble Codes.
TABLE 4 - NARROWING DOWN THE PROBLEM
(PAGES 14-15)