BENDIX Fusion FLR-25 - Narrowing down the Problem

8
1.2 NARROWING DOWN THE PROBLEM
Use this table to help assess if the Bendix
®
Fusion
™
FLR-25
™
Radar Sensor is not performing correctly. Be sure to have
a thorough understanding of the system’s normal behavior; this will reduce the troubleshooting time. This 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.
Narrowing Down the Problem (1.2)
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 Diagnostic Trouble Codes (DTCs).
Refer to Section 2.5: Diagnostic Trouble Codes.
Refer to Appendix A3: Bendix
™
FLR-25
™
Radar Sensor Mounting Clearance.
If the radar sensor is blocked by ice, snow, mud, tampering, etc. so that it cannot "see" a
forward vehicle, the Fusion system will notify the driver by an audible and/or visual alert.
After the blockage is removed, the audible and/or visual alert will be removed. Drivers
should visually check the radar sensor for blockage during the pre-trip inspection.
Potential False Warnings
Do false warnings seem to happen
in construction zones?
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de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?
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.
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 or the bumper.
The radar sensor needs a solid mounting surface in order to hold the alignment. If the
radar sensor alignment cannot be held in place, the bracket assembly must be replaced,
and/or if the bumper or mounting cross-member is damaged, replace it as needed.
Table 2 – Narrowing Down the Problem