2
Diagnostics, Troubleshooting and Testing
24
WABCO
Maintenance Manual MM-1306 (Revised 08-18)
Blocked Radar
The radar sensor is protected by a fascia. The fascia and the radar
sensor must not be blocked in any manner. The radar sensor can
become blocked by snow, ice, dirt or other foreign matter. If this
occurs, the radar sensor will have limited or no functionality. If a
“Blocked Radar” error occurs, the screen in Figure 2.13 or
Figure 2.14 will be presented on the display:
Figure 2.13
Figure 2.14
If this occurs, perform the following procedure:
1.
Determine if the radar sensor is blocked by snow, ice, dirt or
anything else.
2.
Clean the surface of the fascia and between the fascia and the
radar sensor. Remove any foreign debris that may form in this
area. Removal of the fascia may be necessary to completely
clean the radar sensor and the inside of the fascia. Do not
remove the radar.
3.
Verify the fascia is correctly installed.
4.
Cycle the ignition OFF for at least two minutes to clear the fault.
The vehicle must be driven to determine if the fault has been
corrected.
Radar Sensor Service Alignment
The following, although not all-inclusive, is a list of service,
maintenance, and repair operations requiring system Service
Alignment:
앫
Chassis parts replacement
앫
Steering or suspension parts replacement, adjustment, or
alignment
앫
Tire inflation or size change, and/or tire replacement
앫
Front body parts replacement or adjustment
NOTE:
Use of non-OEM bumpers, hoods, and brush guards not
verified to work with the system on a particular vehicle may result in
driveability concerns and affect system performance with worst case
result in DTCs or disabled CMS.
If the radar sensor needs to be aligned, the radar sensor mounting
system has become damaged or has loosened, or new radar sensor
software has been installed, a Radar Sensor Service Alignment will
need to be performed.
If a Radar Sensor Service Alignment is required, the Radar Not
Aligned Screen may be displayed as shown in Figure 2.15.
Figure 2.15
NOTE:
While the system is in Service Alignment mode, the system
does not track vehicles or operate until the Service Alignment
procedure is completed.
Figure 2.13
Figure 2.14
4010
6
32
a
System Error
SPN
517503
FMI
14
Count
2
OnGuard DISABLED
SERVICE VEHICLE
4010
6
33
a
System Error
SPN
517503
FMI
14
Count
2
BLOCKED RADAR
REMOVE DEBRIS
Figure 2.15
4010385
a
Radar Not Aligned
Start Alignment Process
0%
RADAR ALIGNMENT
