2
Diagnostics, Troubleshooting and Testing
20
WABCO
Maintenance Manual MM-1306 (Revised 08-18)
517503
14
Radar Sensor blocked by ice, mud or
debris while driving. Reflected signal
from other vehicles is too weak
앫
Park the vehicle in a safe location, set the Parking Brake and turn
ignition OFF.
앫
Inspect and clean the radar fascia.
앫
The DTC will be cleared when ignition is switched ON.
앫
Drive the vehicle in traffic about 5 minutes at speeds above 20
mph to confirm the blockage is cleared.
517504
14
Radar Sensor blocked. No objects
observed within 2 minutes while driving
앫
Park the vehicle in a safe location, set the Parking Brake and turn
ignition OFF.
앫
Inspect and clean the radar fascia.
앫
Re-start the engine. DTC should clear as the vehicle begins driving
above 15 mph.
앫
If the Blocked Radar DTC causes a secondary engine DTC, an
additional ignition OFF cycle may be required to clear the
secondary DTC.
517505
13
VDY velocity correction factor is Out of
Range
앫
Check speed signal parameters in engine, braking system, and
tachograph.
517525
13
Unknown error during alignment.
Software did not respond on time
앫
Perform Service Alignment.
517527
13
Alignment monitoring failed in azimuth
- Radar sensor is looking too far to the
right.
This code may indicate the radar
installation was damaged by impact
(frame cross-member, bumper, radar
bracket, etc.).
This code may also indicate a Radar
Service Alignment was not completed
following axle alignment.
앫
Check for damage to radar sensor, bracket and fascia.
앫
Perform Service Alignment.
517528
13
Alignment monitoring failed in azimuth
- Radar sensor is looking too far to the
left.
This code may indicate the radar
installation was damaged by impact
(frame cross-member, bumper, radar
bracket, etc.).
This code may also indicate a Radar
Service Alignment was not completed
following axle alignment.
앫
Check for damage to radar sensor, bracket and fascia.
앫
Perform Service Alignment.
SPN
FMI
Cause/Description
Action/Repair Instructions
