ONGUARD™ COLLISION
SAFETY SYSTEM
MAINTENANCE MANUAL
Service Notes
WARNING
CAUTION
About This Manual
This service manual applies to all vehicles equipped with the
OnGuard™ Collision Safety System.
Before You Begin
1. Read and understand all instructions and procedures before
you begin to service components.
2. Read and observe all Warning and Caution hazard alert
messages in this publication. They provide information that can
help prevent serious personal injury, damage to components,
or both.
3. Follow your company’s maintenance and service, installation
and diagnostics guidelines.
4. Use special tools when required to help avoid serious personal
injury and damage to components.
Hazard Alert Messages and Torque
Symbols
How to Obtain Tools and Supplies
Specified in This Manual
Call WABCO’s Commercial Vehicle Aftermarket at 888-725-9355 to
obtain WABCO tools and supplies.
A Warning alerts you to an instruction or procedure that you
must follow exactly to avoid serious personal injury and
damage to components.
A Caution alerts you to an instruction or procedure that you
must follow exactly to avoid damage to components.
@ This symbol alerts you to tighten fasteners to a specified torque
value.
How to Obtain Additional Maintenance
and Service Information
Visit Literature on Demand at WABCO-auto.com to access and order
product, service, aftermarket, and warranty literature for WABCO’s
truck, trailer and specialty vehicle components.
Information contained in this publication was in effect at the time the publication
was approved for printing and is subject to change without notice or liability.
WABCO reserves the right to revise the information presented or to discontinue the
production of parts described at any time.
WABCO Maintenance Manual MM-0951 (Revised 08-18)
Contents
Asbestos and Non-Asbestos Fibers
i
pg.
1 Section 1: Introduction
Overview
How OnGuard Works
2 System Components
4
Section 2: Diagnostics, Troubleshooting and
Testing
General Information
Radar Sensor and Display Software Levels
Fault Codes
5 Troubleshooting Guide
6 TOOLBOX Software Diagnostics
12 Radar Software Version USO 1.XXXX Fault Code Table
22 Radar Software Version USO 2.XXXX Fault Code Table
47 Radar Inspection and Preventive Maintenance
Radar System Troubleshooting
51 Electrical System and Harnesses Troubleshooting
53 Component Message Fault Troubleshooting
54 Cruise Control System Troubleshooting
55 Anti-lock Braking System (ABS) Troubleshooting
57
Section 3: Component Replacement
Radar Sensor
59 Display Replacement
60
Section 4: Appendix
Product Information Letter #504
Asbestos and Non-Asbestos Fibers
ASBESTOS FIBERS WARNING
The following procedures for servicing brakes are recommended to reduce exposure to
asbestos fiber dust, a cancer and lung disease hazard. Material Safety Data Sheets are
available from WABCO.
Hazard Summary
Because some brake linings contain asbestos, workers who service brakes must understand the
potential hazards of asbestos and precautions for reducing risks. Exposure to airborne asbestos
dust can cause serious and possibly fatal diseases,
and cancer, principally lung cancer and mesothelioma (a cancer of the lining of the chest or
abdominal cavities). Some studies show that the risk of lung cancer among persons who smoke
and who are exposed to asbestos is much greater than the risk for non-smokers.
these diseases may not become apparent for 15, 20 or more years after the first exposure to
asbestos.
Accordingly, workers must use caution to avoid creating and breathing dust when servicing brakes.
Specific recommended work practices for reducing exposure to asbestos dust follow
employer for more details.
including asbestosis (a chronic lung disease)
Symptoms of
. Consult your
Recommended Work Practices
1. Separate Work Areas. Whenever feasible, service brakes in a separate area away from other
operations to reduce risks to unprotected persons. OSHA has set a maximum allowable level of
exposure for asbestos of 0.1 f/cc as an 8-hour time-weighted average and 1.0 f/cc averaged over
a 30-minute period. Scientists disagree,
allowable exposure levels will eliminate the risk of disease that can result from inhaling asbestos
OSHA requires that the following sign be posted at the entrance to areas where exposures
dust.
exceed either of the maximum allowable levels:
RESPIRATORS AND PROTECTIVE CLOTHING
2. Respiratory Protection. Wear a respirator equipped with a high-efficiency (HEP
approved by NIOSH or MSHA for use with asbestos at all times when servicing brakes, beginning
with the removal of the wheels.
3. Procedures for Servicing Brakes.
a. Enclose the brake assembly within a negative pressure enclosure. T
equipped with a HEPA vacuum and worker arm sleeves. With the enclosure in place, use the
HEPA vacuum to loosen and vacuum residue from the brake parts.
b. As an alternative procedure, use a catch basin with water and a biodegradable,
non-phosphate, water-based detergent to wash the brake drum or rotor and other brake
parts.
The solution should be applied with low pressure to prevent dust from becoming
airborne. Allow the solution to flow between the brake drum and the brake support or the
brake rotor and caliper.
wetted to suppress dust before the brake shoes or brake pads are removed.
parts clean with a cloth.
c. If an enclosed vacuum system or brake washing equipment is not available, employers may
adopt their own written procedures for servicing brakes, provided that the exposure levels
associated with the employer’s procedures do not exceed the levels associated with the
enclosed vacuum system or brake washing equipment.
details.
d. Wear a respirator equipped with a HEPA filter approved by NIOSH or MSHA for use with
asbestos when grinding or machining brake linings.
a local exhaust ventilation system equipped with a HEPA filter.
e. NEVER use compressed air by itself, dry brushing, or a vacuum not equipped with a HEPA
filter when cleaning brake parts or assemblies. NEVER use carcinogenic solvents, flammable
solvents,
4. Cleaning Work Areas. Clean work areas with a vacuum equipped with a HEPA filter or by wet
wiping. NEVER use compressed air or dry sweeping to clean work areas. When you empty vacuum
cleaners and handle used rags,
or MSHA for use with asbestos. When you replace a HEPA filter, wet the filter with a fine mist of
water and dispose of the used filter with care.
5. Worker Clean-Up. After servicing brakes,
Shower after work. Do not wear work clothes home. Use a vacuum equipped with a HEPA filter to
vacuum work clothes after they are worn. Launder them separately. Do not shake or use
compressed air to remove dust from work clothes.
6. Waste Disposal.
such as in sealed plastic bags. Consult applicable EPA, state and local regulations on waste
disposal.
or solvents that can damage brake components as wetting agents.
Dispose of discarded linings, used rags, cloths and HEPA filters with care,
however, to what extent adherence to the maximum
DANGER: ASBESTOS
CANCER AND LUNG DISEASE HAZARD
AUTHORIZED PERSONNEL ONLY
ARE REQUIRED IN THIS AREA.
Th e wheel hub and brake assembly components should be thoroughly
Consult OSHA regulations for more
In addition, do such work in an area with
wear a respirator equipped with a HEPA filter approved by NIOSH
wash your hands before you eat, drink or smoke.
A) filter
he enclosure should be
Wipe the brake
Regulatory Guidance
References to OSHA, NIOSH, MSHA, and EPA, which are regulatory agencies in the United States,
are made to provide further guidance to employers and workers employed within the United States.
Employers and workers employed outside of the United States should consult the regulations that
apply to them for further guidance.
NON-ASBESTOS FIBERS WARNING
The following procedures for servicing brakes are recommended to reduce exposure to
non-asbestos fiber dust, a cancer and lung disease hazard. Material Safety Data Sheets
are available from WABCO.
Hazard Summary
Most recently manufactured brake linings do not contain asbestos fibers. These brake linings may
contain one or more of a variety of ingredients, including glass fibers, mineral wool, aramid fibers,
ceramic fibers and silica that can present health risks if inhaled. Scientists disagree on the extent
of the risks from exposure to these substances.
silicosis, a non-cancerous lung disease. Silicosis gradually reduces lung capacity and efficiency
and can result in serious breathing difficulty
fibers, when inhaled, can cause similar diseases of the lung. In addition, silica dust and ceramic
fiber dust are known to the State of California to cause lung cancer. U.S. and international
agencies have also determined that dust from mineral wool,
causes of cancer.
Accordingly, workers must use caution to avoid creating and breathing dust when servicing brakes.
Specific recommended work practices for reducing exposure to non-asbestos dust follow
your employer for more details.
Nonetheless, exposure to silica dust can cause
. Some scientists believe other types of non-asbestos
ceramic fibers and silica are potential
. Consult
Recommended Work Practices
1. Separate Work Areas. Whenever feasible, service brakes in a separate area away from other
operations to reduce risks to unprotected persons.
2. Respiratory Protection. OSHA has set a maximum allowable level of exposure for silica of
0.1 mg/m3 as an 8-hour time-weighted average. Some manufacturers of non-asbestos brake
linings recommend that exposures to other ingredients found in non-asbestos brake linings be
kept below 1.0 f/cc as an 8-hour time-weighted average. Scientists disagree,
extent adherence to these maximum allowable exposure levels will eliminate the risk of disease
that can result from inhaling non-asbestos dust.
Therefore, wear respiratory protection at all times during brake servicing, beginning with the
removal of the wheels.
NIOSH or MSHA, if the exposure levels may exceed OSHA or manufacturers’ recommended
maximum levels. Even when exposures are expected to be within the maximum allowable levels,
wearing such a respirator at all times during brake servicing will help minimize exposure.
3. Procedures for Servicing Brakes.
a. Enclose the brake assembly within a negative pressure enclosure. The enclosure should be
equipped with a HEP
HEPA vacuum to loosen and vacuum residue from the brake parts.
b. As an alternative procedure, use a catch basin with water and a biodegradable,
non-phosphate, water-based detergent to wash the brake drum or rotor and other brake
parts.
airborne. Allow the solution to flow between the brake drum and the brake support or the
brake rotor and caliper.
wetted to suppress dust before the brake shoes or brake pads are removed. Wipe the brake
parts clean with a cloth.
If an enclosed vacuum system or brake washing equipment is not available, carefully clean
c.
the brake parts in the open air. Wet the parts with a solution applied with a pump-spray bottle
that creates a fine mist. Use a solution containing water, and,
non-phosphate, water-based detergent. The wheel hub and brake assembly components
should be thoroughly wetted to suppress dust before the brake shoes or brake pads are
removed.
d. Wear a respirator equipped with a HEPA filter approved by NIOSH or MSHA when grinding or
machining brake linings. In addition, do such work in an area with a local exhaust ventilation
system equipped with a HEPA filter.
e. NEVER use compressed air by itself,
filter when cleaning brake parts or assemblies. NEVER use carcinogenic solvents, flammable
solvents, or solvents that can damage brake components as wetting agents.
4. Cleaning Work Areas.
wiping. NEVER use compressed air or dry sweeping to clean work areas. When you empty vacuum
cleaners and handle used rags, wear a respirator equipped with a HEPA filter approved by NIOSH
or MSHA, to minimize exposure. W
water and dispose of the used filter with care.
5. Worker Clean-Up. After servicing brakes, wash your hands before you eat, drink or smoke.
Shower after work. Do not wear work clothes home. Use a vacuum equipped with a HEP
vacuum work clothes after they are worn. Launder them separately. Do not shake or use
compressed air to remove dust from work clothes.
6. Waste Disposal. Dispose of discarded linings, used rags, cloths and HEPA filters with care,
such as in sealed plastic bags. Consult applicable EP
disposal.
Wear a respirator equipped with a high-efficiency (HEPA) filter approved by
A vacuum and worker arm sleeves. With the enclosure in place, use the
The solution should be applied with low pressure to prevent dust from becoming
Th e wheel hub and brake assembly components should be thoroughly
Wipe the brake parts clean with a cloth.
dry brushing, or a vacuum not equipped with a HEPA
Clean work areas with a vacuum equipped with a HEPA filter or by wet
hen you replace a HEPA filter, wet the filter with a fine mist of
A, state and local regulations on waste
however, to what
if available, a biodegradable,
A filter to
Regulatory Guidance
References to OSHA, NIOSH, MSHA, and EPA, which are regulatory agencies in the United States,
are made to provide further guidance to employers and workers employed within the United States.
Employers and workers employed outside of the United States should consult the regulations that
apply to them for further guidance.
WABCO Maintenance Manual MM-0951 (Revised 08-18)
i
1 Introduction
Overview
1 Introduction
How OnGuard Works
Adaptive Cruise Control
Adaptive Cruise Control (ACC) is an in-vehicle electronic system that
automatically maintains a minimum following interval to a lead
vehicle in the same lane, by controlling engine throttle, engine
retarder or foundation brakes without driver intervention.
Collision Mitigation System
Collision Mitigation System (CMS), if equipped, is integral to the
OnGuard™ Collision Safety System. The system will provide driver
alerts with both a visual and audible alarm through an in-cab dash
display when the vehicles following distance could result in a
rear-end collision. The OnGuard™ Collision Mitigation System will
not become active below 15 mph.
Collision Warning System
The Collision Warning System (CWS) is an in-vehicle electronic
system that monitors the roadway in front of the host vehicle and
warns the driver when a potential collision risk exists at vehicle
speed above 15 mph.
Cruise Control
Cruise Control is the standard system that maintains a vehicle speed
set by the driver.
OnGuard
OnGuard is a collision safety system that incorporates adaptive
cruise control with active braking, CMS, if equipped, and a collision
warning system.
Radar Sensor
OnGuard is an Adaptive Cruise Control (ACC) and Collision Warning
System (CWS) and if equipped, a Collision Mitigation System (CMS).
ACC is a radar based tracking system that works in conjunction with
standard Cruise Control to maintain the set cruise speed when no
vehicle is being tracked and maintains a safe following distance
when a target vehicle is being tracked. The safe following distance
is maintained by controlling engine throttle, engine retarder and the
foundation brakes without driver intervention. When the target
vehicle is no longer being tracked, the set cruise speed resumes
automatically.
The CWS provides the driver with an audible and visual alert to a
potentially dangerous driving situation. It is integral with the ACC,
but also functions when the cruise control is not being used. If the
driver is following too close behind another vehicle at a steady
driving speed, the following distance alert emits an audible tone and
the in-cab dash display screen turns yellow. This alert ends when
the driver’s vehicle speed drops below the lead vehicle speed and
the following distance is increased. The alert also activates if the
driver is using the accelerator pedal to override the cruise control
and approaches too close to a vehicle. The CWS and following
distance alert is disabled (will NOT alert) when the driver’s vehicle
speed is below 15 mph.
With the cruise control set, the ACC system provides engine throttle
and retarder control as well as foundation brake activation if
necessary. This automatic brake application is intended only to
provide early braking as the driver is recognizing and reacting to the
situation (the driver must also apply the brakes in response to the
Collision Warning). If the cruise control is not set, the system
provides driver alerts with both visual and audible alarms, but does
not apply braking, engine throttle or retarder control.
The radar sensor is mounted in the front of the vehicle and is used
to detect target vehicles for the OnGuard Collision Safety System.
SAE J1939 Network
The SAE J1939 Serial Control and Communications Vehicle Network
allows various electronic controllers on the vehicle to interact
efficiently and in coordination with each other. The interactions
between controllers include sharing sensor data and calculated
information, allowing subsystems to influence each other’s
operation and communicating subsystem operating state and
configuration.
The CWS is always active when at a road speed of approximately
15 mph or faster. No action is needed to turn CWS on and it cannot
be arbitrarily turned off. Note, however, that the ACC is only
activated when the cruise control is engaged and functions only
down to the engine manufacturer’s minimum cruise speed.
Collision Mitigation System (CMS) is integral to the OnGuard™
Collision Safety System. The system will provide driver alerts with
both a visual and audible alarm through an in-cab dash display
when the vehicles following distance could result in a rear-end
collision. If a potential rear-end collision is developing and the driver
does not take action to decelerate the vehicle, OnGuard™’s Active
Braking automatically de-throttles the engine, applies the engine
and foundation brakes to provide up to 0.35Gs of braking power.
WABCO Maintenance Manual MM-0951 (Revised 08-18)
1
1 Introduction
WARNING
This Active Braking application is intended only to provide early
braking as the driver is recognizing and reacting to the situation —
the driver must take the appropriate corrective action in response to
the collision warning. The OnGuard™ Collision Mitigation System
will not become active below 15 mph.
The OnGuard Collision Safety System should only be
considered an aid to drivers in maintaining a safe following
distance and is not intended to replace driver control over the
vehicle at any time. OnGuard is only intended to initiate
braking of the vehicle in an effort to avoid an incident. It is not
to be relied on to always function and is merely a backup
safety system. In the event the OnGuard Safety System
requires activation of the foundation brakes, there is a limit to
its maximum braking ability (by design). The driver is expected
to intervene and assume control of the braking of the vehicle.
OnGuard should not be relied on to track target vehicles when
either or both vehicles (base and target) have entered and are
traveling through a curve in the road. ACC is not recommended
for use in winding (curving) roads. OnGuard should not be
expected to track smaller objects such as motorcycles,
mopeds, bicycles, etc. OnGuard will not track fixed or
stationary objects.
Figure1.1
RADAR SENSOR
4007298a
Figure 1.1
Fascia
The fascia is a protective cover for the radar sensor and is
assembled to the same bracket on which the radar sensor is
mounted. Figure 1.2 and Figure 1.3. The fascia should not be
blocked by any foreign matter (dirt, snow, ice, stickers, etc.),
otherwise a system fault will occur and the OnGuard system will not
operate. There are four styles of fascia to accommodate different
applications. Figure 1.2 and Figure 1.3.
Figure1.2
CHIN
When operating a vehicle, always use safe driving techniques.
The driver is ALWAYS the most important factor in safe vehicle
operation.
System Components
Radar Sensor
The radar sensor is mounted in the front of the vehicle and centered
in the bumper in most applications. Figure 1.1. The sensor has an
electrical connector that provides power, ground and
communication to the SAE J1939 network which is required for
correct operation.
Figure 1.2
CHIN
4009027a
2
WABCO Maintenance Manual MM-0951 (Revised 08-18)
1 Introduction
4009028a
Figure1.3
Figure 1.3
Display
The OnGuard Display provides the interface for the driver.
Figure 1.4. Audible and visual warnings, as well as verification of
correct system operation and faults, are communicated to the
driver. The driver is able to monitor the status of target vehicles that
the OnGuard system is tracking. The functions of the OnGuard
display may be integrated into a vehicle’s architecture/dash display.
If the vehicle has an integrated display, please refer to your owner’s
manual for correct operation.
Figure1.4
4007143a
Figure 1.4
Electrical Harnesses
Several electrical harnesses are required for the OnGuard system.
These include harnesses to connect the radar sensor to power and
ground, as well as the SAE J1939 systems and the OnGuard
Display. The individual harnesses will be detailed throughout this
maintenance manual. Reference to the vehicle manufacturer’s
service manual may also be required to service some of the
electrical harnesses.
WABCO Maintenance Manual MM-0951 (Revised 08-18)
3
2 Diagnostics, Troubleshooting and Testing
4007300a
SOFTWARE VERSION SCREEN
Display
VO.30
USO2.0016
RadarRadar
SOFTWARE REVSOFTWARE REV
SPN
FMI
Count
DM1 Error
2 Diagnostics, Troubleshooting and Testing
General Information
Radar Sensor and Display Software Levels
Many diagnostic and troubleshooting procedures will require
knowledge of the software level of the OnGuard radar sensor and
display. The software level of these two components can be
determined through the display itself. Figure 2.1. To determine the
software level:
1. Turn the ignition key on and wait for the display to power up.
2. Press the “MODE” button on the display until the screen
labeled “Software Rev” is shown.
Take note of the software version of each component for
reference during the procedures required in this manual and
for component replacement.
Figure2.1
Figure2.2
FAULT CODE SCREEN
TM
OnGuard
DM1 Error
Datalink Not Connected
SPN
FMI
2A01 2
Count
26
e
f
t
a
y
S
S
y
n
s
o
i
t
e
s
i
l
MODE
m
s
l
o
C
4007301a
Figure 2.2
Multiple fault codes may be present. If a fault code is shown on the
display, use the UP and DOWN keys on the OnGuard display to scroll
through each fault code. Figure 2.3. Record each code for future
reference.
Figure2.3
DISPLAY MODE UP/DOWN KEYS
TM
OnGuard
Figure 2.1
Fault Codes
If the system is not operating correctly, a fault code may be shown
on the display. Only currently active fault codes are displayed.
Figure 2.2.
NOTE: It is important to document any fault code that is displayed
because stored fault codes are not displayed and are only
retrievable with TOOLBOX
NOTE: When active codes are present, the OnGuard system is
disabled. This includes ACC, CWS, CMS and the vehicle cruise
function.
TM
Software.
e
f
t
a
y
S
S
y
n
s
o
i
t
e
s
i
l
MODE
m
s
l
o
C
4007302a
Figure 2.3
There are two fault code tables in this section. The radar software
version is required to determine which fault code table to use. The
radar software version will be either USO 1.XXXX or USO 2.XXXX.
Figure 2.1. Fault Code Table A is for radar software 1.XXXX. Fault
Code Table B is for radar software USO 2.XXXX.
The Troubleshooting Section and Subsection entries in the far right
column of the Fault Code Tables refer to the more detailed
information provided later on in this manual.
If the display shows a fault code not listed in the Fault Code Tables,
contact WABCO North America Customer Care at 855-228-3203
for assistance.
4
WABCO Maintenance Manual MM-0951 (Revised 08-18)
2 Diagnostics, Troubleshooting and Testing
OnGuard fault codes may be generated and displayed during service
procedures on other electrical system components (i.e., engine,
transmission, ABS, etc.). After completion of service on the other
vehicle system components, cycle the ignition OFF for one minute
and then turn the ignition back ON. Start the engine and run it at idle
speed for one minute. This frequently clears the OnGuard fault
code(s).
Troubleshooting Guide
If the OnGuard display does not light up when the engine is on,
make sure that the display brightness is turned up sufficiently to
make the screen visible. If the display brightness adjustment is
correct or the adjustment screen cannot be seen, the display is not
receiving any power or input signals. This can be caused by
problems in the electrical harness. Refer to Display Harness
Electrical Checks in the Electrical System and Harness
Troubleshooting Section.
OnGuard fault codes may be generated and displayed during service
procedures on other electrical system components (i.e., engine,
transmission, ABS, etc.). If the OnGuard display screen turns red
with fault codes visible after the vehicle has been serviced for other
vehicle system issues, cycle the ignition OFF for one minute, turn
the ignition back ON, start the engine and run at idle speed for one
minute. This frequently clears the OnGuard fault code(s).
앫 The radar sensor may be too close to or actually contacting the
bumper as mounted, which will affect the radar signal. There
should be at least 1/4 inch of clearance between the fascia,
radar sensor or bracket and the bumper. Check that the
adjustment screws are turned in so that the gap between the
radar sensor and the mounting bracket is 1/4 to 3/8 inch. If this
does not resolve the problem of the fascia or radar sensor
touching the bumper, contact your vehicle manufacturer
representative on adjustments to the bumper for radar sensor
clearance.
앫 The radar may not be aligned correctly. Refer to the Radar
Sensor Alignment procedure.
If the OnGuard display is showing a red screen with the message
“ACC1 Link Error”, Figure 2.4, this screen means that the display
isn’t receiving SAE J1939 network messages from the radar sensor.
This can be caused by problems in the electrical harness. Refer to
Radar Harness Electrical Checks in the Electrical System and
Harness Troubleshooting Section.
Figure2.4
DATA ERROR
ACC1 Link Error
If the OnGuard Collision Safety System is not correctly tracking
vehicles that are in your lane or is tracking vehicles that are not in
your lane, this may be due to radar operational issues.
Typically these are radar operational issues that can result from the
following problems:
앫 Debris (dirt, snow, ice) on the radar fascia or between the fascia
and the radar sensor. This must be cleaned off.
앫 The radar fascia may be mounted upside down. The radar fascia
should be mounted with the indented “chin” positioned facing
the radar electrical connector location.
앫 The radar sensor may be loose or not tightly secured on the
alignment screws. Check that the alignment screws are turned in
so that the gap between the radar sensor and the mounting
bracket is 1/4 to 3/8 inch. Also check that the radar sensor
alignment screws are seated in the ball socket clips and the ball
socket clips are fully seated in the radar sensor. Verify that the
ball socket clips and through-hole adjusters are not broken.
Adjust, repair and replace the alignment screws, ball socket clips
and through-hole adjusters as necessary.
4007150a
Figure 2.4
If the OnGuard display shows a red screen with the message “Mode
6 Error”, Figure 2.5, this screen means that the display cannot
process error messages that it is receiving from the radar. Replace
the display per the Display Replacement procedure in Section 3.
WABCO Maintenance Manual MM-0951 (Revised 08-18)
5
2 Diagnostics, Troubleshooting and Testing
4007303a
MODE 6 ERROR
DATA ERROR
Mode 6 Error
4007045a
Figure2.5
Figure 2.5
If the vehicle’s standard cruise control is working and OnGuard
Adaptive Cruise Control (ACC) is not working, consult your dealer or
engine supplier. This can occur if the engine controller has been
re-programmed or the engine parameter that activates OnGuard has
been turned off. Consult with your dealer or engine supplier for
engine software and parameter adjustments.
If the OnGuard display shows a red screen with a fault code, refer to
Table A for Software Version USO 1.XXXX or Table B for Software
Version USO 2.XXXX for a description. Also refer to the
Troubleshooting Section and Sub-Section of this manual, listed in
the last column of Table A or Table B.
NOTE: TOOLBOX™ Software version 10.0 or higher.
NOTE: For installation and setup instructions for using TOOLBOX™
Software, refer to the TOOLBOX™ Software User’s Manual,
TP-99102. The manual is posted on wabco-auto.com/TOOLBOX.
To access the WABCO TOOLBOX™ Software from the desktop
screen, double-click on the WABCO PC Diagnostics (TOOLBOX™)
icon. Figure 2.7.
Figure2.7
4008868a
Figure 2.7
From the message box that appears, click on the OnGuard Radar
Diagnostics button. Figure 2.8.
NOTE: Be sure to scroll through all active faults using the display
UP and DOWN arrow keys.
The Fault Code Screen shown in Figure 2.2 will typically be a one or
two line fault description, an SPN error code, an FMI and a count.
Look up the error code number in column one of the Fault Code
Tables and find the repair instructions. Refer to Table A for Software
Version USO 1.XXXX or Table B for Software Version USO 2.XXXX.
TOOLBOX Software Diagnostics
Figure2.6
Figure 2.6
Figure2.8
WABCO Toolbox PC Diagnostics
4008869b
Figure 2.8
6
WABCO Maintenance Manual MM-0951 (Revised 08-18)
2 Diagnostics, Troubleshooting and Testing
4008870a
WABCO OnGuard Radar Diagnostics
4008871a
Displaying Radar Information:
To retrieve radar sensor information, select “Diagnostic Information”
from the OnGuard Radar Diagnostics home screen. Figure 2.9.
Figure2.9
Figure 2.9
This will then display the radar sensor part number and software
levels, as well as other important information. Figure 2.10.
Figure2.10
Retrieving Faults:
1. To display OnGuard radar sensor faults, select the “Display”
option from the menu.
2. From the pull-down menu, select “Diagnostic Trouble Codes”
to bring up the fault information screen. Figure 2.11.
Figure2.11
Figure 2.10
4008872a
Figure 2.11
WABCO Maintenance Manual MM-0951 (Revised 08-18)
7
2 Diagnostics, Troubleshooting and Testing
4008873a
3. A description of the fault, the number of times the fault
occurred, the suspect parameter number (SPN) and the failure
mode identifier (FMI) are all displayed in the Diagnostic Trouble
Codes window. Basic repair instructions for each fault are also
provided. Figure 2.12. After making the necessary repairs, use
the “Clear Faults” button to clear the faults.
Figure2.12
Figure2.13
4008874a
Figure 2.13
Figure2.14
Figure 2.12
4. A fault report can also be generated by selecting the “Generate
Fault Report “button, while in the “Diagnostic Trouble Codes”
screen. A “Save As” screen will then come up asking you to
name the file and select where it will be saved. Figure 2.13.
The “Fault Report” screen provides additional information that
is not included in the “Diagnostic Trouble Codes” screen.
Figure 2.14.
4008875b
Figure 2.14
Faults can be cleared after generating a fault report. Only
stored faults will clear. Figure 2.12.
Recording OnGuard J1939 Data:
1. To access OnGuard Radar J1939 Data, click on “J1939 Bus
Data” from the OnGuard Radar Diagnostics home screen.
Figure 2.9.
8
WABCO Maintenance Manual MM-0951 (Revised 08-18)
2 Diagnostics, Troubleshooting and Testing
4008877a
4008878a
2. To capture a log file, click on “Start Logging”. Figure 2.15. A
single log file will capture up to 5 minutes of information. To
pause a log file, click on “Pause”; to resume logging, click on
“Resume”. Once the required data has been captured, click on
“Stop Logging”. Figure 2.16.
Figure2.15
Figure 2.15
Figure2.17
4008879a
Figure 2.17
Figure2.18
Figure2.16
Figure 2.16
3. A “Save As” screen will then come up asking you to name the
file and select where it will be saved. Figure 2.17. Specific
messages can also be viewed after saving the file by clicking
on “Load Saved Data”, and then highlighting the desired
message. Figure 2.18.
4008880a
Figure 2.18
WABCO Maintenance Manual MM-0951 (Revised 08-18)
9
2 Diagnostics, Troubleshooting and Testing
4008881a
Displaying Application Parameters:
1. Certain specific radar application parameters can be viewed
and reset using TOOLBOX™ Software. To access this screen,
select the “Display” option from the menu.
2. From the pull-down menu, select “Application Parameters” to
bring up the “Application Parameters” screen. Figure 2.19.
Figure2.19
Figure2.20
4008882a
Figure 2.20
4. If the radar software version is USO 1.XXXX, these parameters
cannot be reset. A message will then be displayed on the
screen explaining this. Figure 2.21.
Figure 2.19
3. The Application Parameters screen will then appear. Driveline
Retarder, Transmission Type, Air Suspension Front Axle and Air
Suspension Rear Axle can all be reset by clicking on “Reset
Application Parameters.” Figure 2.20.
Figure2.21
4008918a
Figure 2.21
10
WABCO Maintenance Manual MM-0951 (Revised 08-18)
2 Diagnostics, Troubleshooting and Testing
4008919a
4008920a
5. If the radar software version is USO 2.XXXX, a message will be
displayed to show that the parameters have been changed.
Figure 2.22. Note that changed parameters are shown in red
and the state of CMS cannot be changed. Figure 2.23.
Figure2.22
Figure2.24
4008921a
Figure 2.24
Figure 2.22
Figure2.23
Figure 2.23
6. If the radar software version is USO 2.0026 or higher, the
parameters for “Air Suspension Front Axle” and “Air
Suspension Rear Axle” are not available. Figure 2.24.
WABCO Maintenance Manual MM-0951 (Revised 08-18)
11
2 Diagnostics, Troubleshooting and Testing
Radar Software Version USO 1.XXXX
Fault Code Table
This fault code table is for use with radar sensors that have release
USO 1.XXXX software only. Refer to the section Radar Sensor and
Display Software Levels to determine the software level. If the
display shows a fault code not listed in the table, contact WABCO
North America Customer Care at 855-228-3203 for assistance.
Table A: Radar Software Version USO 1.XXXX Fault Code Table
Fault Code
SPN/FMI
Displayed
Description Fault Description Repair Instructions
Troubleshooting
Section
Sub-Section
2A00/02 Datalink Not
Connected
2A01/02 Datalink Not
Connected
2A01/22 Radar Memory
Error
J1939 network bus
connection error after several
restarts at 0.02s, 0.2s, 2.0s
and 20s
No J1939 network messages
received at all
Radar horizontal alignment
error or yaw rate sensor
invalid signal
앫 Verify J1939 network bus termination
resistors are installed at both ends of the
backbone.
앫 Verify all ECUs on the J1939 network bus are
transmitting at 250 Kbits/sec.
앫 Verify J1939 network is connected to each
component.
앫 Verify J1939 Hi and Lo connections are not
reversed on any component on the network.
앫 Verify J1939 network bus termination
resistors are installed at both ends of the
backbone.
앫 Verify J1939 bus resistance is 60 ohms from
J1939 Hi to J1939 Lo.
앫 Verify all ECUs on the network are transmitting
at 250 Kbits/sec.
앫 Verify condition of radar mounting and
hardware.
앫 Realign radar sensor using alignment
procedure.
앫 Check display for number of fault occurrences.
Radar Harness
Troubleshooting
Radar Harness
Troubleshooting
Radar System
Radar Sensor
Alignment
2A01/24 Unlisted DM1 Error Undefined Error 앫 If this error occurs, contact WABCO North
12
WABCO Maintenance Manual MM-0951 (Revised 08-18)
앫 If none of the above resolves the issue,
contact WABCO North America Customer Care
at 855-228-3203 for further assistance.
Radar System
America Customer Care at 855-228-3203 for
further assistance.
Table A: Radar Software Version USO 1.XXXX Fault Code Table
Fault Code
SPN/FMI
Displayed
Description Fault Description Repair Instructions
2 Diagnostics, Troubleshooting and Testing
Troubleshooting
Section
Sub-Section
2A02/02 Cruise Control
Msg Timeout
2A02/22 Unlisted DM1 Error Radar alignment error 앫 Realign radar using sensor alignment
2A03/02 Cruise Control
Data Error
2A04/02 Cruise Control
Data Error
2A07/02 Brake Control Data
Error
CCVS message timeout >
5 messages
Invalid parking brake switch
signal CCVS message
Invalid BRAKE_SWITCH
signal CCVS message
Invalid front axle speed signal
in EBC2 message
앫 Verify engine ECU is functional and has correct
parameters and software downloaded from
the engine database.
앫 Verify the correct engine ECU part number is
used on this vehicle.
앫 Cycle the ignition to clear faults after engine
servicing.
procedure.
앫 Use the OnGuard display “ACC FUNCTION”
screen to determine if the parking brake
switch is operational.
앫 Verify engine ECU is functional and has correct
parameters and software downloaded from
the engine database.
앫 Verify the correct engine ECU part number is
used on this vehicle.
앫 Cycle the ignition to clear faults after engine
servicing.
앫 Use the OnGuard “ACC FUNCTION” screen to
determine if brake switch is operational.
앫 Verify engine ECU is functional and has correct
parameters and software downloaded from
the engine database.
앫 Verify the correct engine ECU part number is
used on this vehicle.
앫 Cycle the ignition to clear faults after engine
servicing.
앫 Verify ABS ECU is functional.
앫 Verify the correct ABS ECU part number is
used on this vehicle.
앫 Cycle the ignition to clear faults after ABS
servicing.
Component
Message Fault
Message Timeout
Radar System
Radar Sensor
Alignment
Component
Message Fault
Message Data
Error
Component
Message Fault
Message Data
Error
Component
Message Fault
Message Data
Error
WABCO Maintenance Manual MM-0951 (Revised 08-18)
13
2 Diagnostics, Troubleshooting and Testing
Table A: Radar Software Version USO 1.XXXX Fault Code Table
Fault Code
SPN/FMI
Displayed
Description Fault Description Repair Instructions
Troubleshooting
Section
Sub-Section
2A0A/00 Radar Blocked or
Dirty
2A0A/02 Brake Control Data
Error
2A0A/23 Unlisted DM1 Error Internal radar voltage issue 앫 Cycle the ignition several times, waiting for the
2A0B/00 Radar Blocked or
Dirty
2A0B/23 Unlisted DM1 Error Internal Radar Voltage Issue 앫 Cycle the ignition several times, waiting for the
Radar signal attenuation. No
target vehicle detected with
vehicle moving > 6 mph
(10 km/h)
Invalid brake pedal position %
signal in EBC1 message
No target detected for
2 minutes with vehicle
moving > 6 mph (10 km/h)
앫 Determine if radar sensor is blocked by snow,
ice or dirt.
앫 Clean surface of fascia and between fascia
and radar sensor.
앫 Verify correct fascia is installed correctly.
앫 Use OnGuard display “ACC FUNCTION” screen
to verify brake pedal position (BPP) sensor is
operational.
앫 ABS ECU is functional.
앫 Verify the correct ABS ECU part number is
used on this vehicle.
앫 Inspect BPP sensor harness for damage.
앫 Verify BPP sensor connector is secured.
앫 Check for debris, ice, water, oil, etc., in air
system.
앫 Replace BPP sensor if required.
앫 Replace ABS ECU if required.
display to turn from a red screen to the blue
vehicle screen after several ignition cycles.
앫 Verify correct system operation.
앫 If the error occurs again after multiple ignition
cycles, contact WABCO North America
Customer Care at 855-228-3203 for further
assistance.
앫 Determine if radar sensor is blocked by snow,
ice or dirt.
앫 Clean surface of fascia and between fascia
and radar sensor.
앫 Verify correct fascia is installed correctly.
display to turn from a red screen to the blue
vehicle screen after several ignition cycles.
앫 Verify correct system operation.
앫 If the error occurs again after multiple ignition
cycles, contact WABCO North America
Customer Care at 855-228-3203 for further
assistance.
Radar System
Radar Blocked
ABS System
Brake Pedal
Position (BPP)
Sensor Fault
Radar System
Radar Multiple
Reset Fault
Radar System
Radar Blocked
Radar System
Radar Multiple
Reset Fault
14
WABCO Maintenance Manual MM-0951 (Revised 08-18)
Table A: Radar Software Version USO 1.XXXX Fault Code Table
Fault Code
SPN/FMI
Displayed
Description Fault Description Repair Instructions
2 Diagnostics, Troubleshooting and Testing
Troubleshooting
Section
Sub-Section
2A0C/02 Cruise Control
Data Error
2A19/02 Transmission
Control Data Error
2A26/02 Brake Control Msg
Timeout
2A28/02 Engine Control
Msg Timeout
2A29/02 Engine Retarder
Control Msg
Timeout
Invalid clutch switch signal in
CCVS message
Invalid driveline engaged
signal in ETC1 message
EBC1 message timeout >
5 messages
EEC1 message timeout >
5 messages
ERC1ER message timeout >
5 messages
앫 Use OnGuard display “ACC FUNCTION” screen
to verify Clutch Switch is operational.
앫 Verify correct radar sensor is installed in
vehicle.
앫 If manual transmission radar sensor is
installed in auto transmission vehicle, fault will
occur.
앫 Use OnGuard display “ACC FUNCTION” screen
to verify Driveline Engage is operational.
앫 Verify transmission ECU is functional and has
correct parameters and software.
앫 Verify the correct transmission ECU part
number is used on this vehicle.
앫 Cycle the ignition to clear faults after
transmission servicing.
앫 Verify that ABS ECU is connected to the J1939
network.
앫 Verify J1939 network operational.
앫 Verify correct ABS part number is used.
앫 Cycle the ignition to clear faults after ABS
servicing.
앫 Verify engine ECU is functional and has correct
parameters and software downloaded from
the engine database.
앫 Verify the correct engine ECU part number is
used on this vehicle.
앫 Cycle the ignition to clear faults after engine
servicing.
앫 Verify engine ECU is functional and has correct
parameters and software downloaded from
the engine database.
앫 Verify the correct engine ECU part number is
used on this vehicle.
Component
Message Fault
Message Data
Error
Component
Message Fault
Message Data
Error
Component
Message Fault
Message Timeout
Component
Message Fault
Message Timeout
Component
Message Fault
Message Timeout
앫 Cycle the ignition to clear faults after engine
servicing.
WABCO Maintenance Manual MM-0951 (Revised 08-18)
15
2 Diagnostics, Troubleshooting and Testing
Table A: Radar Software Version USO 1.XXXX Fault Code Table
Fault Code
SPN/FMI
Displayed
Description Fault Description Repair Instructions
Troubleshooting
Section
Sub-Section
2A38/02 Engine Control
Data Error
2A40/02 Engine Control
Data Error
2A43/02 Brake Control Msg
Timeout
Invalid actual percent torque
signal in EEC1 message
Invalid engine speed signal in
EEC1 message
EBC2 timeout > 5 messages 앫 Verify that ABS ECU is connected to the J1939
앫 Verify engine ECU is functional and has correct
parameters and software downloaded from
the engine database.
앫 Verify the correct engine ECU part number is
used on this vehicle.
앫 Cycle the ignition to clear faults after engine
servicing.
앫 Verify engine ECU is functional and has correct
parameters and software downloaded from
the engine database.
앫 Verify the correct engine ECU part number is
used on this vehicle.
앫 Cycle the ignition to clear faults after engine
servicing.
network.
앫 Verify J1939 network operational.
앫 Verify correct ABS part number is used.
앫 Cycle the ignition to clear faults after ABS
servicing.
Component
Message Fault
Message Data
Error
Component
Message Fault
Message Data
Error
Component
Message Fault
Message Timeout
2A44/02 Power Supply
Undervoltage
2A45/02 Power Supply
Overvoltage
Vehicle voltage to radar <
6 VDC
Vehicle voltage to radar >
16 VDC
앫 Verify that the voltage at the radar sensor is >
6 VDC when loaded with a headlamp
connected across pins 1 and 6 of the radar
sensor connector.
앫 Inspect the radar connector for corrosion.
앫 Inspect each of the power connections
between the ignition switch and the radar to
determine where loss of power may be
occurring.
앫 Monitor the battery voltage to determine if the
battery is providing voltage between 10V and
16V.
앫 If the voltage exceeds 16V, troubleshoot the
voltage regulator and alternator system.
앫 Also determine if a jump start or battery
charging has occurred that could cause a
vehicle overvoltage condition.
Electrical System
and Harnesses
System Voltage
Fault
Electrical System
and Harnesses
System Voltage
Fault
16
WABCO Maintenance Manual MM-0951 (Revised 08-18)
Table A: Radar Software Version USO 1.XXXX Fault Code Table
Fault Code
SPN/FMI
Displayed
Description Fault Description Repair Instructions
2 Diagnostics, Troubleshooting and Testing
Troubleshooting
Section
Sub-Section
2A48/02 Brake Control Data
Error
2A49/02 Brake Control Data
Error
2A4A/02 Engine Control
Msg Timeout
Invalid EBS brake switch
signal in EBC1 message
Invalid
COMB_VEHICLE_WEIGHT
signal in CVW message
EEC2 timeout > 5 messages 앫 Verify engine ECU is functional and has correct
앫 Use the OnGuard display “ACC FUNCTION”
screen to determine if the brake switch is
operating correctly.
앫 Verify ABS ECU is functional.
앫 Verify the correct ABS ECU part number is
used on this vehicle.
앫 Cycle the ignition to clear faults after ABS
servicing.
앫 Use OnGuard display “Radar Alignment”
screen to verify RSC Mass Estimation is
working.
앫 Verify ABS ECU is functional.
앫 Verify the correct ABS ECU part number is
used on this vehicle.
앫 Check ABS ECU for invalid combined vehicle
weight message.
앫 Cycle the ignition to clear faults after ABS
servicing.
parameters and software downloaded from
the engine database.
앫 Verify the correct engine ECU part number is
used on this vehicle.
Component
Message Fault
Message Data
Error
Component
Message Fault
Message Data
Error
Component
Message Fault
Message Timeout
2A4E/02 Air Suspension
Control Msg
Timeout
2A56/02 Transmission
Control Msg
Timeout
앫 Cycle the ignition to clear faults after engine
servicing.
ASC1 timeout > 5 messages 앫 Verify that the ECAS ECU is connected to the
J1939 network and is functional.
앫 Verify ECAS is functional and has correct
parameters.
앫 Cycle the ignition to clear faults after ECAS
servicing.
ETC1 timeout > 5 messages 앫 Verify that transmission ECU is connected to
the J1939 network.
앫 Verify J1939 network is operational.
앫 Verify correct transmission parameters are
downloaded from transmission database.
앫 Cycle the ignition to clear faults after
Transmission servicing.
WABCO Maintenance Manual MM-0951 (Revised 08-18)
Component
Message Fault
Message Timeout
Component
Message Fault
Message Timeout
17
2 Diagnostics, Troubleshooting and Testing
Table A: Radar Software Version USO 1.XXXX Fault Code Table
Fault Code
SPN/FMI
Displayed
Description Fault Description Repair Instructions
Troubleshooting
Section
Sub-Section
2A5F/02 Power Supply
Undervoltage
2A60/02 Power Supply
Overvoltage
2A67/02 CAN WBC
TRACKING
COUNTER
Vehicle voltage to radar < 10
VDC
Vehicle voltage to radar >
16 VDC
OSEK Task Failure 앫 Cycle the ignition several times, waiting for the
앫 Verify that the voltage at the radar sensor is
>10 VDC when loaded with a headlamp
connected across pins 1 and 6 of the radar
sensor connector.
앫 Inspect the radar connector for corrosion.
앫 Inspect each of the power connections
between the ignition switch and the radar to
determine where loss of power may be
occurring.
앫 Monitor the battery voltage to determine if the
battery is providing voltage between 10V and
16V.
앫 If the voltage exceeds 16V, troubleshoot the
voltage regulator and alternator system.
앫 Also determine if a jump start or battery
charging has occurred that could cause a
vehicle overvoltage condition.
display to turn from a red screen to the blue
vehicle screen after several ignition cycles.
앫 Verify correct system operation.
앫 If the error occurs again after multiple ignition
cycles, contact WABCO North America
Customer Care at 855-228-3203 for further
assistance.
Electrical System
and Harnesses
System Voltage
Fault
Electrical System
and Harnesses
System Voltage
Fault
Radar System
Radar Multiple
Reset Fault
2A68/02 CAN WBC GYRO
ADJUSTMENT
18
WABCO Maintenance Manual MM-0951 (Revised 08-18)
Yaw rate sensor offset
calibration error
앫 Cycle the ignition several times, waiting for the
display to turn from a red screen to the blue
vehicle screen after several ignition cycles.
앫 Verify correct system operation.
앫 If the error occurs again after multiple ignition
cycles, contact WABCO North America
Customer Care at 855-228-3203 for further
assistance.
Radar System
Radar Multiple
Reset Fault
Table A: Radar Software Version USO 1.XXXX Fault Code Table
Fault Code
SPN/FMI
Displayed
Description Fault Description Repair Instructions
2 Diagnostics, Troubleshooting and Testing
Troubleshooting
Section
Sub-Section
2A69/02 Engine Control
Msg Timeout
2A6A/02 Engine Retarder
Control Msg
Timeout
2A79/02 ACC Display Msg
Timeout
2A7A/02 ACC Display Data
Error
2A84/02 Brake Control Data
Error
CFG_E timeout >
5 messages
CFG_ER timeout >
5 messages
ACC2 timeout > 5 messages 앫 Display has stopped sending data.
Invalid requested distance
mode signal in ACC2
message
Invalid WHEEL_SPEED_FL
signal in EBC2 message
앫 Verify engine ECU is functional and has correct
parameters and software downloaded from
the engine database.
앫 Verify the correct engine ECU part number is
used on this vehicle.
앫 Cycle the ignition to clear faults after engine
servicing.
앫 Verify engine ECU is functional and has correct
parameters and software downloaded from
the engine database.
앫 Verify the correct engine ECU part number is
used on this vehicle.
앫 Cycle the ignition to clear faults after engine
servicing.
앫 Intermittent display power or intermittent
J1939 network bus. Verify harness is correct.
앫 Replace display if necessary. Electrical System
앫 Verify ABS ECU is functional.
앫 Verify the correct ABS ECU part number is
used on this vehicle.
앫 Cycle the ignition to clear faults after ABS
servicing.
Component
Message Fault
Message Timeout
Component
Message Fault
Message Timeout
Electrical System
and Harness
Display Message
Timeout
and Harness
Display Message
Data Error
Component
Message Fault
Message Data
Error
2A85/02 Brake Control Data
Error
2A86/02 Brake Control Data
Error
Invalid WHEEL_SPEED_FR
signal in EBC2 message
Invalid WHEEL_SPEED_RL
signal in EBC2 message
앫 Verify ABS ECU is functional.
앫 Verify the correct ABS ECU part number is
used on this vehicle.
앫 Cycle the ignition to clear faults after ABS
servicing.
앫 Verify ABS ECU is functional.
앫 Verify the correct ABS ECU part number is
used on this vehicle.
앫 Cycle the ignition to clear faults after ABS
servicing.
WABCO Maintenance Manual MM-0951 (Revised 08-18)
Component
Message Fault
Message Data
Error
Component
M
essage Fault
Message Data
Error
19
2 Diagnostics, Troubleshooting and Testing
Table A: Radar Software Version USO 1.XXXX Fault Code Table
Fault Code
SPN/FMI
Displayed
Description Fault Description Repair Instructions
Troubleshooting
Section
Sub-Section
2A87/02 Brake Control Data
Error
2A8B/02 CAN WBC ARS
INIT FAILED
2A8E/02 Engine Ignores
ACC Control
Invalid WHEEL_SPEED_RR
signal in EBC2 message
Radar not initialized 앫 Verify no foreign objects are in front of the
Engine does not accept TSC1
commands from ACC
앫 Verify ABS ECU is functional.
앫 Verify the correct ABS ECU part number is
used on this vehicle.
앫 Cycle the ignition to clear faults after ABS
servicing.
fascia or between the fascia and radar sensor.
Generally this debris is reflective (foil, etc.).
앫 Cycle the ignition and verify correct system
operation.
앫 Drive the vehicle at speeds over 10 mph
(15 kph) for longer than 30 seconds.
앫 If none of the above resolves the issue,
contact WABCO North America Customer Care
at 855-228-3203 for further assistance.
앫 Verify correct engine parameters are for ACC.
앫 Reprogram engine parameters if not correct.
앫 Check for multiple faults using OnGuard
display. If multiple faults, this is a secondary
fault caused by other faults. Correct other
faults and cycle ignition to clear this fault.
앫 If single fault, is probably gateway issue.
Component
Message Fault
Message Data
Error
Radar System
Radar Reset Fault
Cruise Control
System
Programming
Faults
Component
Message Fault
Engine Ignores
ACC Fault
20
WABCO Maintenance Manual MM-0951 (Revised 08-18)
Table A: Radar Software Version USO 2.XXXX Fault Code Table
Fault Code
SPN/FMI
Displayed
Description Fault Description Repair Instructions
2 Diagnostics, Troubleshooting and Testing
Troubleshooting
Section
Sub-Section
2A8F/02 BPP Sensor Fault No BPP signal >0 for the last
3 braking maneuvers
(< 1.5m/s2) without ACC
active
앫 Use OnGuard display “ACC FUNCTION” screen
to verify brake pedal position (BPP) sensor is
operational.
앫 Verify the radar sensor software version is
USO 1.0015 or greater. If the version is USO
1.0013 or 1.0014, contact WABCO North
America Customer Care at 855-228-3203 for
further assistance.
앫 Verify ABS ECU is functional.
앫 Verify the correct ABS ECU part number is
used on this vehicle.
앫 Inspect BPP sensor harness for damage.
앫 Verify BPP sensor is secured.
앫 Check for debris, ice, water, oil, etc., in air
system blocking the BPP.
앫 Replace BPP sensor if required.
앫 Replace ABS ECU if required.
ABS System
Brake Pedal
Position (BPP)
Sensor Fault
WABCO Maintenance Manual MM-0951 (Revised 08-18)
21
2 Diagnostics, Troubleshooting and Testing
Radar Software Version USO 2.XXXX
Fault Code Table
This fault code table is for use with radar sensors that have release
USO 2.XXXX software only. Refer to the section on Radar Sensor
and Display Software Levels to determine the software level. If the
display shows a fault code not listed in the table, contact WABCO
North America Customer Care at 855-228-3203 for assistance.
Table B: Radar Software Version USO 2.XXXX Fault Code Table
Fault Code
SPN/FMI
Displayed
Description Fault Description Repair Instructions
Troubleshooting
Section
Sub-Section
86017/12 Radar Antenna
Error
86018/12 Radar Antenna
Error
86019/12 Radar Antenna
Error
86020/12 Radar Antenna
Error
86021/12 Radar Antenna
Error
Antenna defect 앫 If this error occurs, contact WABCO North
America Customer Care at 855-228-3203 for
further assistance.
Center lobe antenna defect 앫 If this error occurs, contact WABCO North
America Customer Care at 855-228-3203 for
further assistance.
Left lobe antenna defect 앫 If this error occurs, contact WABCO North
America Customer Care at 855-228-3203 for
further assistance.
Right lobe antenna defect 앫 If this error occurs, contact WABCO North
America Customer Care at 855-228-3203 for
further assistance.
Antenna switch defect 앫 If this error occurs, contact WABCO North
America Customer Care at 855-228-3203 for
further assistance.
Component
Replacement
Radar Sensor
Replacement
Component
Replacement
Radar Sensor
Replacement
Component
Replacement
Radar Sensor
Replacement
Component
Replacement
Radar Sensor
Replacement
Component
Replacement
Radar Sensor
Replacement
86029/12 Radar Antenna
Error
86030/12 Radar Int Comm
Error
22
WABCO Maintenance Manual MM-0951 (Revised 08-18)
Defective antenna switch 앫 If this error occurs, contact WABCO North
Internal communication error
between DSP and μC
America Customer Care at 855-228-3203 for
further assistance.
앫 Cycle ignition and verify correct system
operation.
앫 If error occurs again, contact WABCO North
America Customer Care at 855-228-3203 for
further assistance.
Component
Replacement
Radar Sensor
Replacement
Radar System
Radar Reset Fault
Table B: Radar Software Version USO 2.XXXX Fault Code Table
Fault Code
SPN/FMI
Displayed
Description Fault Description Repair Instructions
2 Diagnostics, Troubleshooting and Testing
Troubleshooting
Section
Sub-Section
86031/12 Radar Int Comm
Error
86032/12 Radar Int Comm
Error
86033/12 Radar Int Comm
Error
86034/12 Radar Int Comm
Error
86035/12 Radar Int DSP Error Internal DSP error 앫 Cycle ignition and verify correct system
86036/12 Radar Int DSP Error Internal DSP error 앫 Cycle ignition and verify correct system
86037/12 Radar Int DSP Error Internal DSP error 앫 Cycle ignition and verify correct system
Internal communication error
between DSP and C
Internal communication error
between DSP and C
Internal communication error
between DSP and C
Internal communication error
between DSP and C
앫 Cycle ignition and verify correct system
operation.
앫 If error occurs again, contact WABCO North
America Customer Care at 855-228-3203 for
further assistance.
앫 Cycle ignition and verify correct system
operation.
앫 If error occurs again, contact WABCO North
America Customer Care at 855-228-3203 for
further assistance.
앫 Cycle ignition and verify correct system
operation.
앫 If error occurs again, contact WABCO North
America Customer Care at 855-228-3203 for
further assistance.
앫 Cycle ignition and verify correct system
operation.
앫 If error occurs again, contact WABCO North
America Customer Care at 855-228-3203 for
further assistance.
operation.
앫 If error occurs again, contact WABCO North
America Customer Care at 855-228-3203 for
further assistance.
operation.
앫 If error occurs again, contact WABCO North
America Customer Care at 855-228-3203 for
further assistance.
operation.
앫 If error occurs again, contact WABCO North
America Customer Care at 855-228-3203 for
further assistance.
Radar System
Radar Reset Fault
Radar System
Radar Reset Fault
Radar System
Radar Reset Fault
Radar System
Radar Reset Fault
Radar System
Radar Reset Fault
Radar System
Radar Reset Fault
Radar System
Radar Reset Fault
WABCO Maintenance Manual MM-0951 (Revised 08-18)
23
2 Diagnostics, Troubleshooting and Testing
Table B: Radar Software Version USO 2.XXXX Fault Code Table
Fault Code
SPN/FMI
Displayed
Description Fault Description Repair Instructions
Troubleshooting
Section
Sub-Section
86038/12 Radar Int DSP Error Internal DSP error 앫 Cycle ignition and verify correct system
operation.
앫 If error occurs again, WABCO North America
Customer Care at 855-228-3203 for further
assistance.
86039/12 Radar Int DSP Error Internal DSP error 앫 Cycle ignition and verify correct system
operation.
앫 If error occurs again, contact WABCO North
America Customer Care at 855-228-3203 for
further assistance.
86040/12 Radar Int DSP Error Internal DSP error 앫 If error occurs again, contact WABCO North
America Customer Care at 855-228-3203 for
further assistance.
86041/12 Radar Int DSP Error Internal DSP error 앫 If error occurs again, contact WABCO North
America Customer Care at 855-228-3203 for
further assistance.
86042/12 Radar Int DSP Error Internal DSP error 앫 If error occurs again, contact WABCO North
America Customer Care at 855-228-3203 for
further assistance.
86043/12 Radar EMC Error External radio frequency
interference in frequency
range of 199.5 to 200 MHz
or hardware defect
앫 Determine if external interference depends on
time or vehicle location.
앫 Move vehicle to another location.
앫 Turn ignition OFF for several minutes, turn
ignition ON. Determine if issue is resolved.
Radar System
Radar Reset Fault
Radar System
Radar Reset Fault
Component
Replacement
Radar Sensor
Replacement
Component
Replacement
Radar Sensor
Replacement
Component
Replacement
Radar Sensor
Replacement
Radar System
Radar RF
Interference Fault
86044/12 Radar Amp Error Defective STC amplifier 앫 If error occurs again, contact WABCO North
86045/12 Radar Amp Error PWM for base amplification
control is at its minimum
level for an excessive time.
Possibly caused by a defect
of the STC amplifier or its
driver, defect of the RF
module or an error in the IF
path.
24
WABCO Maintenance Manual MM-0951 (Revised 08-18)
America Customer Care at 855-228-3203 for
further assistance.
앫 If this error occurs, contact WABCO North
America Customer Care at 855-228-3203 for
further assistance.
Component
Replacement
Radar Sensor
Replacement
Component
Replacement
Radar Sensor
Replacement
Table B: Radar Software Version USO 2.XXXX Fault Code Table
Fault Code
SPN/FMI
Displayed
Description Fault Description Repair Instructions
2 Diagnostics, Troubleshooting and Testing
Troubleshooting
Section
Sub-Section
86046/12 Radar Amp Error PWM for base amplification
control is at its maximum
level for an excessive time.
Possibly caused by a defect
of the STC amplifier or its
driver, defect of the RF
module or an error in the IF
path.
86047/12 Radar A/D Error FPGA input offset is too high,
possibly caused by a
defective analog/digital
converter or an erroneous
connection between FPGA
and ADC
86048/12 Radar VCO Error Defective voltage controlled
oscillator or its driver, or the
IF bandpass filter
86049/12 Radar A/D Error Defective bandpass filter or
its connections, ADC or
connection between ADC and
FPGA
86050/12 Radar VCO Error Defective VCO 앫 If this error occurs, contact WABCO North
앫 If this error occurs, contact WABCO North
America Customer Care at 855-228-3203 for
further assistance.
앫 If this error occurs, contact WABCO North
America Customer Care at 855-228-3203 for
further assistance.
앫 If this error occurs, contact WABCO North
America Customer Care at 855-228-3203 for
further assistance.
앫 If this error occurs, contact WABCO North
America Customer Care at 855-228-3203 for
further assistance.
America Customer Care at 855-228-3203 for
further assistance.
Component
Replacement
Radar Sensor
Replacement
Component
Replacement
Radar Sensor
Replacement
Component
Replacement
Radar Sensor
Replacement
Component
Replacement
Radar Sensor
Replacement
Component
Replacement
Radar Sensor
Replacement
86051/12 Radar Memory
Error
86052/12 Radar Memory
Error
86053/12 Radar Memory
Error
Defective RAM memory 앫 If this error occurs, contact WABCO North
America Customer Care at 855-228-3203 for
further assistance.
Corrupt EEPROM memory
mapping
Corrupt EEPROM and backup
data
앫 If this error occurs, contact WABCO North
America Customer Care at 855-228-3203 for
further assistance.
앫 If this error occurs, contact WABCO North
America Customer Care at 855-228-3203 for
further assistance.
WABCO Maintenance Manual MM-0951 (Revised 08-18)
Component
Replacement
Radar Sensor
Replacement
Component
Replacement
Radar Sensor
Replacement
Component
Replacement
Radar Sensor
Replacement
25
2 Diagnostics, Troubleshooting and Testing
Table B: Radar Software Version USO 2.XXXX Fault Code Table
Fault Code
SPN/FMI
Displayed
Description Fault Description Repair Instructions
Troubleshooting
Section
Sub-Section
86054/12 Radar Memory
Error
86055/12 Radar Memory
Error
86056/12 Radar Memory
Error
86057/12 Radar Memory
Error
86058/12 Radar Memory
Error
Corrupt EEPROM data is not
backed up
EEPROM mapping is not
determinable, or possibly not
initialized
Unknown EEPROM mapping
identification; write access is
blocked
EEPROM write access failure 앫 If this error occurs, contact WABCO North
Corrupt EEPROM data and its
backup
앫 If this error occurs, contact WABCO North
America Customer Care at 855-228-3203 for
further assistance.
앫 If this error occurs, contact WABCO North
America Customer Care at 855-228-3203 for
further assistance.
앫 If this error occurs, contact WABCO North
America Customer Care at 855-228-3203 for
further assistance.
America Customer Care at 855-228-3203 for
further assistance.
앫 If this error occurs, contact WABCO North
America Customer Care at 855-228-3203 for
further assistance.
Component
Replacement
Radar Sensor
Replacement
Component
Replacement
Radar Sensor
Replacement
Component
Replacement
Radar Sensor
Replacement
Component
Replacement
Radar Sensor
Replacement
Component
Replacement
Radar Sensor
Replacement
86059/12 Radar FPGA
Timeout
86060/12 Radar CRC Error FPGA CRC failure 앫 Cycle ignition and verify correct system
86061/12 Radar FPGA State
Error
FPGA timeout 앫 Cycle ignition and verify correct system
operation.
앫 If error occurs again, contact WABCO North
America Customer Care at 855-228-3203 for
further assistance.
operation.
앫 If error occurs again, contact WABCO North
America Customer Care at 855-228-3203 for
further assistance.
Unknown FPGA state 앫 Cycle ignition and verify correct system
operation.
앫 If error occurs again, contact WABCO North
America Customer Care at 855-228-3203 for
further assistance.
Radar System
Radar Reset Fault
Radar System
Radar Reset Fault
Radar System
Radar Reset Fault
26
WABCO Maintenance Manual MM-0951 (Revised 08-18)
Table B: Radar Software Version USO 2.XXXX Fault Code Table
Fault Code
SPN/FMI
Displayed
Description Fault Description Repair Instructions
2 Diagnostics, Troubleshooting and Testing
Troubleshooting
Section
Sub-Section
86062/12 Radar DSP Error DSP boot error 앫 If error occurs, contact WABCO North America
Customer Care at 855-228-3203 for further
assistance.
86063/12 Radar DSP Error DSP boot error 앫 If error occurs, contact WABCO North America
Customer Care at 855-228-3203 for further
assistance.
86064/12 Radar DSP Error DSP timeout at boot time 앫 Cycle ignition and verify correct system
operation.
앫 If error occurs again, contact WABCO North
America Customer Care at 855-228-3203 for
further assistance.
86065/12 Radar DSP Error DSP timeout at data
initialization
86066/12 Radar DSP Comm
Error
Internal communication error
between DSP and C
앫 Cycle ignition and verify correct system
operation.
앫 If error occurs again, contact WABCO North
America Customer Care at 855-228-3203 for
further assistance.
앫 Cycle ignition and verify correct system
operation.
앫 If error occurs again, contact WABCO North
America Customer Care at 855-228-3203 for
further assistance.
Component
Replacement
Radar Sensor
Replacement
Component
Replacement
Radar Sensor
Replacement
Radar System
Radar Reset Fault
Radar System
Radar Reset Fault
Radar System
Radar Reset Fault
86067/12 Radar DSP Comm
Error
86068/12 Radar DSP Error DSP boot error 앫 If error occurs, contact WABCO North America
86069/12 Radar DSP Error DSP boot error 앫 Cycle ignition and verify correct system
Internal communication error
between DSP and C
앫 Cycle ignition and verify correct system
operation.
앫 If error occurs again, contact WABCO North
America Customer Care at 855-228-3203 for
further assistance.
Customer Care at 855-228-3203 for further
assistance.
operation.
앫 If error occurs again, contact WABCO North
America Customer Care at 855-228-3203 for
further assistance.
WABCO Maintenance Manual MM-0951 (Revised 08-18)
Radar System
Radar Reset Fault
Component
Replacement
Radar Sensor
Replacement
Radar System
Radar Reset Fault
27
2 Diagnostics, Troubleshooting and Testing
Table B: Radar Software Version USO 2.XXXX Fault Code Table
Fault Code
SPN/FMI
Displayed
Description Fault Description Repair Instructions
Troubleshooting
Section
Sub-Section
86070/12 Radar DSP Error Unknown DSP identification 앫 Cycle ignition and verify correct system
operation.
앫 If error occurs again, contact WABCO North
America Customer Care at 855-228-3203 for
further assistance.
86071/12 Radar Yaw Error Because of missing valid yaw
rate information, no track can
be calculated
86072/12 Radar Spd Correct
Error
86075/12 Temperature
Sensor Error
86076/12 Radar Timeout
Error
86077/12 Radar Timeout
Error
Invalid vehicle speed
correction value is calculated
or read out of EEPROM
Defective radar temperature
sensor
Radar antenna A timeout 앫 If error occurs, contact WABCO North America
Radar antenna B timeout 앫 If error occurs, contact WABCO North America
앫 If error occurs, contact WABCO North America
Customer Care at 855-228-3203 for further
assistance.
앫 If error occurs, contact WABCO North America
Customer Care at 855-228-3203 for further
assistance.
앫 If error occurs, contact WABCO North America
Customer Care at 855-228-3203 for further
assistance.
Customer Care at 855-228-3203 for further
assistance.
Customer Care at 855-228-3203 for further
assistance.
Radar System
Radar Reset Fault
Component
Replacement
Radar Sensor
Replacement
Component
Replacement
Radar Sensor
Replacement
Component
Replacement
Radar Sensor
Replacement
Component
Replacement
Radar Sensor
Replacement
Component
Replacement
Radar Sensor
Replacement
86078/12 Radar Timeout
Error
86079/12 Radar Timeout
Error
86080/12 Radar Int Comm
Error
28
WABCO Maintenance Manual MM-0951 (Revised 08-18)
Radar antenna C timeout 앫 If error occurs, contact WABCO North America
Internal timeout 앫 If error occurs, contact WABCO North America
Internal communication error 앫 If error occurs, contact WABCO North America
Customer Care at 855-228-3203 for further
assistance.
Customer Care at 855-228-3203 for further
assistance.
Customer Care at 855-228-3203 for further
assistance.
Component
Replacement
Radar Sensor
Replacement
Component
Replacement
Radar Sensor
Replacement
Component
Replacement
Radar Sensor
Replacement
Table B: Radar Software Version USO 2.XXXX Fault Code Table
Fault Code
SPN/FMI
Displayed
Description Fault Description Repair Instructions
2 Diagnostics, Troubleshooting and Testing
Troubleshooting
Section
Sub-Section
86081/12 Radar Int Comm
Error
86082/12 Radar OSEK Error OSEK shutdown routine was
86083/12 Radar Int Voltage
Error
86084/12 Radar Int Voltage
Error
Internal communication error 앫 If error occurs, contact WABCO North America
activated
Internal radar voltage issue 앫 Cycle ignition several times waiting for the
Internal radar voltage issue 앫 Cycle ignition several times waiting for the
Customer Care at 855-228-3203 for further
assistance.
앫 Cycle ignition several times waiting for the
display to turn from a red screen to the blue
vehicle screen after several ignition cycles.
앫 Verify correct system operation.
앫 If error occurs again after multiple ignition
cycles, contact WABCO North America
Customer Care at 855-228-3203 for further
assistance.
display to turn from a red screen to the blue
vehicle screen after several ignition cycles.
앫 Verify correct system operation.
앫 If error occurs again after multiple ignition
cycles, contact WABCO North America
Customer Care at 855-228-3203 for further
assistance.
display to turn from a red screen to the blue
vehicle screen after several ignition cycles.
앫 Verify correct system operation.
Component
Replacement
Radar Sensor
Replacement
Radar System
Radar Multiple
Reset Fault
Radar System
Radar Multiple
Reset Fault
Radar System
Radar Multiple
Reset Fault
86085/12 Radar Int Voltage
Error
앫 If error occurs again after multiple ignition
cycles, contact WABCO North America
Customer Care at 855-228-3203 for further
assistance.
Internal radar voltage issue 앫 Cycle ignition several times waiting for the
display to turn from a red screen to the blue
vehicle screen after several ignition cycles.
앫 Verify correct system operation.
앫 If error occurs again after multiple ignition
cycles, contact WABCO North America
Customer Care at 855-228-3203 for further
assistance.
WABCO Maintenance Manual MM-0951 (Revised 08-18)
Radar System
Radar Multiple
Reset Fault
29
2 Diagnostics, Troubleshooting and Testing
Table B: Radar Software Version USO 2.XXXX Fault Code Table
Fault Code
SPN/FMI
Displayed
Description Fault Description Repair Instructions
Troubleshooting
Section
Sub-Section
86086/12 Radar Int Voltage
Error
86087/14 Over Temperature
Error
86088/12 Radar
Programming Error
86089/12 Radar Internal
Comm Error
86090/12 Radar Internal
Comm Error
86091/12 Radar Internal
Comm Error
Internal radar voltage issue 앫 Cycle ignition several times waiting for the
display to turn from a red screen to the blue
vehicle screen after several ignition cycles.
앫 Verify correct system operation.
앫 If error occurs again after multiple ignition
cycles, contact WABCO North America
Customer Care at 855-228-3203 for further
assistance.
Internal radar sensor
temperature exceeds 95C
caused by ambient external
temperature > 80C
Missing FLASH memory CRC 앫 If error occurs, contact WABCO North America
Internal communication error 앫 Cycle ignition and verify correct system
Internal communication error 앫 Cycle ignition and verify correct system
Internal communication error 앫 Cycle ignition and verify correct system
앫 Determine if sufficient air is flowing around the
radar sensor and through the radiator.
앫 Remove any debris that may be blocking the
air flow.
앫 Wait for the system to cool down.
앫 Verify correct system operation.
앫 If error is not cleared, contact WABCO North
America Customer Care at 855-228-3203 for
further assistance.
Customer Care at 855-228-3203 for further
assistance.
operation.
앫 If error occurs again, contact WABCO North
America Customer Care at 855-228-3203 for
further assistance.
operation.
앫 If error occurs again, contact WABCO North
America Customer Care at 855-228-3203 for
further assistance.
operation.
앫 If error occurs again, contact WABCO North
America Customer Care at 855-228-3203 for
further assistance.
Radar System
Radar Multiple
Reset Fault
Radar System
Radar Over
Temperature Fault
Component
Replacement
Radar Sensor
Replacement
Radar System
Radar Reset Fault
Radar System
Radar Reset Fault
Radar System
Radar Reset Fault
30
WABCO Maintenance Manual MM-0951 (Revised 08-18)
Table B: Radar Software Version USO 2.XXXX Fault Code Table
Fault Code
SPN/FMI
Displayed
Description Fault Description Repair Instructions
2 Diagnostics, Troubleshooting and Testing
Troubleshooting
Section
Sub-Section
86092/12 Radar Internal
Comm Error
86093/18 Under Temperature
Error
86094/12 Radar Memory
Error
86095/12 Temperature
Sensor Error
86096/12 Yaw Rate Sensor
Error
Internal communication error 앫 Cycle ignition and verify correct system
operation.
앫 If error occurs again, contact WABCO North
America Customer Care at 855-228-3203 for
further assistance.
Vehicle speed > 6 mph
(10 km/h) and internal
temperature < 42C
(43.6F)
Defective RAM memory 앫 If error occurs, contact WABCO North America
Defective radar temperature
sensor detected by yaw rate
sensor
Defective yaw rate sensor 앫 If error occurs, contact WABCO North America
앫 Radar sensor operating temperature is too
low. Operate at temperature > 42C
(43.6F).
Customer Care at 855-228-3203 for further
assistance.
앫 If error occurs, contact WABCO North America
Customer Care at 855-228-3203 for further
assistance.
Customer Care at 855-228-3203 for further
assistance.
Radar System
Radar Reset Fault
Radar System
Radar Under
Temperature Fault
Component
Replacement
Radar Sensor
Replacement
Component
Replacement
Radar Sensor
Replacement
Component
Replacement
Radar Sensor
Replacement
86097/12 Radar
Programming Error
86098/12 Radar
Programming Error
86099/12 Radar
Programming Error
86100/12 Radar
Programming Error
No application software
loaded
FLASH memory error 앫 If error occurs, contact WABCO North America
EEPROM memory error
Application software version
is not allowed
앫 If error occurs, contact WABCO North America
Customer Care at 855-228-3203 for further
assistance.
Customer Care at 855-228-3203 for further
assistance.
앫 If error
앫 If error occurs, contact WABCO North America
occurs, contact WABCO North America
Customer Care at 855-228-3203 for further
assistance.
Customer Care at 855-228-3203 for further
assistance.
WABCO Maintenance Manual MM-0951 (Revised 08-18)
Component
Replacement
Radar Sensor
Replacement
Component
Replacement
Radar Sensor
Replacement
Component
Replacement
Radar Sensor
Replacement
Component
Replacement
Radar Sensor
Replacement
31
2 Diagnostics, Troubleshooting and Testing
Table B: Radar Software Version USO 2.XXXX Fault Code Table
Fault Code
SPN/FMI
Disp
layed
Description Fault Description Repair Instructions
Troubleshooting
Section
Sub-Section
86101/12 Radar
Programming Error
86102/12 Radar
Programming Error
86103/12 Radar
Programming Error
86104/12 Radar Diagnostic
Error
86105/12 Radar
Programming Error
86106/12 Radar
Programming Error
Application software error 앫 If error occurs, contact WABCO North America
Customer Care at 855-228-3203 for further
assistance.
Boot loader error 앫 Cycle ignition and verify correct system
operation.
앫 If error occurs again, contact WABCO North
America Customer Care at 855-228-3203 for
further assistance.
Corrupt sensor identification
data
Invalid diagnostic request 앫 If error occurs, contact WABCO North America
Application software
checksum error during
download
Memory Block CRC failure 앫 If error occurs, contact WABCO North America
앫 If error occurs, contact WABCO North America
Customer Care at 855-228-3203 for further
assistance.
Customer Care at 855-228-3203 for further
assistance.
앫 If error occurs, contact WABCO North America
Customer Care at 855-228-3203 for further
assistance.
Customer Care at 855-228-3203 for further
assistance.
Component
Replacement
Radar Sensor
Replacement
Radar System
Radar Reset Fault
Component
Replacement
Radar Sensor
Replacement
Component
Replacement
Radar Sensor
Replacement
Component
Replacement
Radar Sensor
Replacement
Component
Replacement
Radar Sensor
Replacement
86107/12 Radar
Programming Error
86108/12 Radar Memory
Error
86109/12 Radar
Programming Error
32
WABCO Maintenance Manual MM-0951 (Revised 08-18)
Flash memory CRC failure 앫 If error occurs, contact WABCO North America
ADC EEPROM driver
response not equal to OK
Sensor position and/or
orientation information is
either missing or corrupt
Customer Care at 855-228-3203 for further
assistance.
앫 If error occurs, contact WABCO North America
Customer Care at 855-228-3203 for further
assistance.
앫 If error occurs, contact WABCO North America
Customer Care at 855-228-3203 for further
assistance.
Component
Replacement
Radar Sensor
Replacement
Component
Replacement
Radar Sensor
Replacement
Component
Replacement
Radar Sensor
Replacement
Table B: Radar Software Version USO 2.XXXX Fault Code Table
Fault Code
SPN/FMI
Displayed
Description Fault Description Repair Instructions
2 Diagnostics, Troubleshooting and Testing
Troubleshooting
Section
Sub-Section
86110/12 Radar Init Error Radar Not Initialized 앫 Verify no foreign objects are in front of the
fascia or between the fascia and radar sensor.
Generally this debris is reflective (foil, etc.).
앫 Realign the radar sensor using the alignment
procedure.
앫 Cycle the ignition and verify correct system
operation.
앫 Drive the vehicle at speeds over 10 mph
(15 kph) for longer than 30 seconds.
앫 If none of the above resolves the issue,
contact WABCO North America Customer Care
at 855-228-3203 for further assistance.
86111/10 Radar OSEK Error OSEK Task Failure 앫 Cycle the ignition several times, waiting for the
display to turn from a red screen to the blue
vehicle screen after several ignition cycles.
앫 Verify correct system operation.
앫 If the error occurs again after multiple ignition
cycles, contact WABCO North America
Customer Care at 855-228-3203 for further
assistance.
86166/8 Radar EMC Error External radio frequency
interference in frequency
range of 76 to 77 GHz
detected with vehicle moving
> 6 mph (10 km/h)
86167/8 Radar EMC Error EMC disturbance with vehicle
moving > 6mph (10 km/h)
86168/8 Radar EMC Error External radio frequency
interference in frequency
range of 199.5 to 200 MHz
앫 Determine if external interference depends on
time or vehicle location.
앫 Move vehicle to another location.
앫 Turn ignition OFF for several minutes, turn
ignition ON. Determine if issue is resolved.
앫 Determine if external interference depends on
time or vehicle location.
앫 Move vehicle to another location.
앫 Turn ignition OFF for several minutes, turn
ignition ON. Determine if issue is resolved.
앫 Determine if external interference depends on
time or vehicle location.
앫 Move vehicle to another location.
Radar System
Radar Reset Fault
Radar System
Radar Multiple
Reset Fault
Radar System
Radar RF
Interference Fault
Radar System
Radar RF
Interference Fault
Radar System
Radar RF
Interference Fault
앫 Turn ignition OFF for several minutes, turn
ignition ON. Determine if issue is resolved.
WABCO Maintenance Manual MM-0951 (Revised 08-18)
33
2 Diagnostics, Troubleshooting and Testing
Table B: Radar Software Version USO 2.XXXX Fault Code Table
Fault Code
SPN/FMI
Displayed
Description Fault Description Repair Instructions
Troubleshooting
Section
Sub-Section
86169/8 Radar EMC Error Strong EMC disturbance 앫 Determine if external interference depends on
time or vehicle location.
앫 Move vehicle to another location.
앫 Turn ignition OFF for several minutes, turn
ignition ON. Determine if issue is resolved.
86170/8 Radar EMC Error Long term strong EMC
disturbance with vehicle
moving > 6 mph (10 km/h)
86216/4 Power Supply
Undervoltage
86216/3 Power Supply
Overvoltage
86266/19 Datalink Not
Connected
Vehicle voltage to radar <
6 VDC
Vehicle voltage to radar >
16 VDC
J1939 network connection
error after several restarts at
0.02s, 0.2s, 2.0s and 20s
앫 Determine if external interference depends on
time or vehicle location.
앫 Move vehicle to another location.
앫 Turn ignition OFF for several minutes, turn
ignition ON. Determine if issue is resolved.
앫 Verify that the voltage at the radar sensor is >
6 VDC when loaded with a headlamp
connected across pins 1 and 6 of the radar
sensor connector.
앫 Inspect the radar connector for corrosion.
앫 Inspect each of the power connections
between the ignition switch and the radar to
determine where loss of power may be
occurring.
앫 Monitor the battery voltage to determine if the
battery is providing voltage between 10V and
16V.
앫 If the voltage exceeds 16V, troubleshoot the
voltage regulator and alternator system.
앫 Also determine if a jump start or battery
charging has occurred that could cause a
vehicle overvoltage condition.
앫 Verify J1939 network bus termination
resistors are installed at both ends of the
backbone.
앫 Verify all ECUs on the J1939 network are
transmitting at 250 Kbits/sec.
Radar System
Radar RF
Interference Fault
Radar System
Radar RF
Interference Fault
Electrical System
and Harnesses
System Voltage
Fault
Electrical System
and Harnesses
System Voltage
Fault
Electrical System
and Harnesses
J1939 Network
34
WABCO Maintenance Manual MM-0951 (Revised 08-18)
Table B: Radar Software Version USO 2.XXXX Fault Code Table
Fault Code
SPN/FMI
Displayed
Description Fault Description Repair Instructions
2 Diagnostics, Troubleshooting and Testing
Troubleshooting
Section
Sub-Section
86267/9 Datalink Not
Connected
86268/14 Cannot Claim
J1939 Address
86316/9 Cruise Control Msg
Timeout
86317/9 Brake Control Msg
Timeout
No J1939 network messages
received at all
Not possible to claim source
address 0x2a
CCVS message timeout >
5 messages
EBC1 message timeout >
5 messages
앫 Verify J1939 network is connected to each
component.
앫 Verify J1939 Hi and Lo connections are not
reversed on any component on the network.
앫 Verify J1939 network bus termination
resistors are installed at both ends of the
backbone.
앫 Verify resistance is 60 ohms from J1939 Hi to
J1939 Lo.
앫 Verify all ECUs on the network are transmitting
at 250 Kbits/sec.
앫 This fault can only happen if another radar or
aftermarket device is connected to J1939 that
has same address.
앫 If this fault occurs, remove other radar or
aftermarket device.
앫 Verify engine ECU is functional and has correct
parameters and software downloaded from
the engine database.
앫 Verify the J1939 network is operational.
앫 Cycle the ignition to clear faults after engine
servicing.
앫 Verify that ABS ECU is connected to the J1939
network.
앫 Verify J1939 network is operational.
Electrical System
and Harnesses
J1939 Network
Electrical System
and Harnesses
J1939 Network
Component
Message Fault
Message Timeout
Component
Message Fault
Message Timeout
86318/9 Engine Control
Msg Timeout
EEC1 message timeout >
5 messages
앫 Verify correct ABS part number is used.
앫 Cycle the ignition to clear faults after ABS
servicing.
앫 Verify engine ECU is functional and has correct
parameters and software downloaded from
the engine database.
앫 Verify the J1939 network is operational.
앫 Cycle the ignition to clear faults after engine
servicing.
WABCO Maintenance Manual MM-0951 (Revised 08-18)
Component
Message Fault
Message Timeout
35
2 Diagnostics, Troubleshooting and Testing
Table B: Radar Software Version USO 2.XXXX Fault Code Table
Fault Code
SPN/FMI
Displayed
Description
Fault Description Repair Instructions
Troubleshooting
Section
Sub-Section
86319/9 Brake Control Msg
Timeout
86320/9 Air Suspension
Control Msg
Timeout
86321/9 Driveline Retarder
Control Msg
Timeout
86322/9 Transmission
Control Msg
Timeout
86323/9 Tachograph Msg
Timeout
EBC2 timeout > 5 messages 앫 Verify that ABS ECU is connected to the J1939
network and is functional.
앫 Verify J1939 network is operational.
앫 Verify correct ABS part number is used.
앫 Cycle the ignition to clear faults after servicing
the ABS.
ASC1 timeout > 5 messages 앫 Verify that the ECAS ECU is connected to the
J1939 network and is functional.
앫 Verify ECAS is functional and has correct
parameters.
앫 Cycle the ignition to clear faults after ECAS
servicing.
ERC1_DR timeout >
5 messages
ETC1 timeout > 5 messages 앫 Verify that transmission ECU is connected to
TCO1 timeout > 5 messages 앫 Verify that tachograph is connected to the
앫 Verify that Driveline Retarder ECU is connected
to the J1939 network.
앫 Verify J1939 network is operational.
앫 Possible fault during Driveline Retarder
diagnostics. Cycle ignition.
the J1939 network.
앫 Verify J1939 network is operational.
앫 Verify correct transmission parameters are
downloaded from transmission database.
앫 Cycle the ignition to clear faults after
transmission servicing.
J1939 network.
앫 Verify J1939 network is operational.
Component
Message Fault
Message Timeout
Component
Message Fault
Message Timeout
Component
Message Fault
Message Timeout
Component
Message Fault
Message Timeout
Component
Message Fault
Message Timeout
86324/9 Brake Control Msg
Timeout
36
WABCO Maintenance Manual MM-0951 (Revised 08-18)
EBC5 message timeout >
5 messages
앫 Verify correct tachograph parameters.
앫 Possible fault during tachograph diagnostics.
Cycle ignition.
앫 Verify that ABS ECU is connected to the J1939
network.
앫 Verify J1939 network is operational.
앫 Verify correct ABS part number is used.
앫 Possible fault during ABS diagnostics. Cycle
ignition.
Component
Message Fault
Message Timeout
Table B: Radar Software Version USO 2.XXXX Fault Code Table
Fault Code
SPN/FMI
Displayed
Description Fault Description Repair Instructions
2 Diagnostics, Troubleshooting and Testing
Troubleshooting
Section
Sub-Section
86325/9 Engine Control
Msg Timeout
86326/9 Driveline Retarder
Control Msg
Timeout
86329/9 ACC Display Msg
Timeout
86330/9 Virtual Target
Message Timeout
Error
86331/9 Engine Retarder
Control Msg
Timeout
CFG_E timeout >
5 messages
CFG_DR timeout >
5 messages
ACC2 timeout > 5 messages 앫 Display has stopped sending data.
VTRGT timeout > 5
messages
CFG_ER timeout >
5 messages
앫 Verify engine ECU is functional and has correct
parameters and software downloaded from
the engine database.
앫 Verify the J1939 network is operational.
앫 Cycle the ignition to clear faults after engine
servicing.
앫 Verify that Driveline Retarder ECU is connected
to the J1939 network.
앫 Verify J1939 network is operational.
앫 Possible fault during Driveline Retarder
diagnostics. Cycle ignition.
앫 Intermittent display power or intermittent
J1939 data link. Verify harness is correct.
앫 If error occurs, contact WABCO North America
Customer Care at 855-228-3203 for further
assistance.
앫 Verify engine ECU is functional and has correct
parameters and software downloaded from
the engine database.
앫 Verify the J1939 network is operational.
앫 Cycle the ignition to clear faults after engine
servicing.
Component
Message Fault
Message Timeout
Component
Message Fault
Message Timeout
Electrical System
and Harnesses
Display Message
Timeout
Component
Message Fault
Message Timeout
Component
Message Fault
Message Timeout
86332/9 Engine Retarder
Control Msg
Timeout
86333/9 Engine Control
Msg Timeout
ERC1 ER message timeout >
5 messages
EEC2 timeout > 5 messages 앫 Verify engine ECU is functional and has correct
앫 Verify engine ECU is functional and has correct
parameters and software downloaded from
the engine database.
앫 Verify the J1939 network is operational.
앫 Cycle the ignition to clear faults after engine
servicing.
parameters and software downloaded from
the engine database.
앫 Verify the J1939 network is operational.
앫 Cycle the ignition to clear faults after engine
servicing.
WABCO Maintenance Manual MM-0951 (Revised 08-18)
Component
Message Fault
Message Timeout
Component
M
essage Fault
Message Timeout
37
2 Diagnostics, Troubleshooting and Testing
Table B: Radar Software Version USO 2.XXXX Fault Code Table
Fault Code
SPN/FMI
Displayed
Description Fault Description Repair Instructions
Troubleshooting
Section
Sub-Section
86334/9 Cruise Control Msg
Timeout
86335/9 Cruise Control Msg
Timeout
86366/19 ACC Display Data
Error
86367/19 ACC Display Data
Error
Timeout CCVS second source 앫 Verify vehicle body or chassis ECU is functional
and has correct parameters and software per
OEM specifications.
앫 Verify the correct vehicle body or chassis ECU
part number is used on this vehicle.
앫 Cycle the ignition to clear faults after engine
servicing.
Timeout CCVS3 앫 Verify engine ECU is functional and has correct
parameters and software.
앫 Verify the J1939 network is operational.
앫 Cycle the ignition to clear faults after engine
servicing.
Invalid requested distance
mode signal in ACC2
message
Invalid ACC activation
demand signal in ACC2
message
앫 Replace display if necessary. Electrical System
앫 Replace display if necessary. Electrical System
Component
Message Fault
Message Timeout
Component
Message Fault
Message Timeout
and Harnesses
Display Message
Data Error
and Harnesses
Display Message
Data Error
86368/19 Air Suspension
Control Data Error
86369/19 Air Suspension
Control Data Error
Invalid Above Front signal in
ASC1 message
Invalid Below Front signal in
ASC1 message
앫 Verify ECAS is functional and has correct
parameters and software.
앫 Verify the ECAS part number is used on this
vehicle.
앫 Troubleshoot ECAS front axle.
앫 Cycle the ignition to clear faults after ECAS
servicing.
앫 Verify ECAS is functional and has correct
parameters and software.
앫 Verify the ECAS part number is used on this
vehicle.
앫 Troubleshoot ECAS front axle.
앫 Cycle the ignition to clear faults after ECAS
servicing.
Component
Message Fault
Message Data
Error
Component
Message Fault
Message Data
Error
38
WABCO Maintenance Manual MM-0951 (Revised 08-18)
Table B: Radar Software Version USO 2.XXXX Fault Code Table
Fault Code
SPN/FMI
Displayed
Description Fault Description Repair Instructions
2 Diagnostics, Troubleshooting and Testing
Troubleshooting
Section
Sub-Section
86370/19 Air Suspension
Control Data Error
86371/19 Air Suspension
Control Data Error
86372/19 Air Suspension
Control Data Error
Invalid Above Rear signal in
ASC1 message
Invalid below Rear signal in
ASC1 message
Invalid nominal level Rear
axle signal in ASC1 message
앫 Verify ECAS is functional and has correct
parameters and software.
앫 Verify the ECAS part number is used on this
vehicle.
앫 Troubleshoot ECAS rear axle.
앫 Cycle the ignition to clear faults after ECAS
servicing.
앫 Verify ECAS is functional and has correct
parameters and software.
앫 Verify the ECAS part number is used on this
vehicle.
앫 Troubleshoot ECAS rear axle.
앫 Cycle the ignition to clear faults after ECAS
servicing.
앫 Verify ECAS is functional and has correct
parameters and software.
앫 Verify the ECAS part number is used on this
vehicle.
앫 Troubleshoot ECAS rear axle.
Component
Message Fault
Message Data
Error
Component
Message Fault
Message Data
Error
Component
Message Fault
Message Data
Error
86373/19 Air Suspension
Control Data Error
86374/19 Cruise Control
Data Error
Invalid nominal level front
axle signal in ASC1 message
Invalid parking brake switch
signal CCVS message
앫 Cycle the ignition to clear faults after ECAS
servicing.
앫 Verify ECAS is functional and has correct
parameters and software.
앫 Verify the ECAS part number is used on this
vehicle.
앫 Troubleshoot ECAS front axle.
앫 Cycle the ignition to clear faults after ECAS
servicing.
앫 Use the OnGuard display “COMPONENT TEST”
screen to determine if the parking brake
switch is operational.
앫 Verify engine ECU is functional and has correct
parameters and software downloaded from
the engine database.
앫 Verify the correct engine ECU part number is
used on this vehicle.
앫 Cycle the ignition to clear faults after engine
servicing.
Component
Message Fault
Message Data
Error
Component
Message Fault
Message Data
Error
WABCO Maintenance Manual MM-0951 (Revised 08-18)
39
2 Diagnostics, Troubleshooting and Testing
Table B: Radar Software Version USO 2.XXXX Fault Code Table
Fault Code
SPN/FMI
Displayed
Description Fault Description Repair Instructions
Troubleshooting
Section
Sub-Section
86375/19 Cruise Control
Data Error
86376/19 Cruise Control
Data Error
86377/19 Cruise Control
Data Error
86378/19 Cruise Control
Data Error
86379/19 Engine Control
Data Error
Invalid clutch switch signal in
CCVS message
Invalid CC state signal in
CCVS message
Invalid CC active signal in
CCVS message
Invalid CC set speed signal in
CCVS message
Invalid Reference Torque
signal in EC message
앫 Use the OnGuard display “COMPONENT TEST”
screen to determine if the clutch switch is
operational.
앫 Verify engine ECU is functional and has correct
parameters and software downloaded from
the engine database.
앫 Verify the correct engine ECU part number is
used on this vehicle.
앫 Cycle the ignition to clear faults after engine
servicing.
앫 Verify engine ECU is functional and has correct
parameters and software.
앫 Verify the correct engine ECU part number is
used on this vehicle.
앫 Cycle the ignition to clear faults after engine
servicing.
앫 Verify engine ECU is functional and has correct
parameters and software.
앫 Verify the correct engine ECU part number is
used on this vehicle.
앫 Cycle the ignition to clear faults after engine
servicing.
앫 Verify engine ECU is functional and has correct
parameters and software.
앫 Verify the correct engine ECU part number is
used on this vehicle.
앫 Cycle the ignition to clear faults after engine
servicing.
앫 Verify engine ECU is functional and has correct
parameters and software.
앫 Verify the correct engine ECU part number is
used on this vehicle.
앫 Cycle the ignition to clear faults after engine
servicing.
Component
Message Fault
Message Data
Error
Component
Message Fault
Message Data
Error
Component
Message Fault
Message Data
Error
Component
Message Fault
Message Data
Error
Component
Message Fault
Message Data
Error
40
WABCO Maintenance Manual MM-0951 (Revised 08-18)
Table B: Radar Software Version USO 2.XXXX Fault Code Table
Fault Code
SPN/FMI
layed
Disp
Description Fault Description Repair Instructions
2 Diagnostics, Troubleshooting and Testing
Troubleshooting
Section
Sub-Section
86380/19 Engine Control
Data Error
86381/19 Driveline Retarder
Control Data Error
86383/19 Brake Control Data
Error
Invalid minimum engine
speed signal in EC message
Invalid reference torque
signal in RC_DR message
Invalid EBS brake switch
signal in EBC1 message
앫 Verify engine ECU is functional and has correct
parameters and software.
앫 Verify the correct engine ECU part number is
used on this vehicle.
앫 Cycle the ignition to clear faults after engine
servicing.
앫 Verify driveline retarder ECU is functional and
has correct parameters and software.
앫 Verify the correct driveline retarder ECU part
number is used on this vehicle.
앫 Cycle the ignition to clear faults after driveline
retarder servicing.
앫 Use the OnGuard display “COMPONENT TEST”
screen to determine if the brake switch is
operating correctly.
앫 Verify ABS ECU is functional.
앫 Verify the correct ABS ECU part number is
used on this vehicle.
앫 Cycle the ignition to clear faults after ABS
servicing.
Component
Message Fault
Message Data
Error
Component
Message Fault
Message Data
Error
Component
Message Fault
Message Data
Error
86384/19 Brake Control Data
Error
86385/19 Brake Control Data
Error
86386/19 Brake Control Data
Error
Invalid ABS fully operational
signal in EBC1 message
Invalid front axle speed signal
in EBC2 message
Invalid system state signal in
EBC5 message
앫 Verify ABS ECU is functional.
앫 Verify the correct ABS ECU part number is
used on this vehicle.
앫 Cycle the ignition to clear faults after ABS
servicing.
앫 Verify ABS ECU is functional.
앫 Verify the correct ABS ECU part number is
used on this vehicle.
앫 Cycle the ignition to clear faults after ABS
servicing.
앫 Verify ABS ECU is functional.
앫 Verify the correct ABS ECU part number is
used on this vehicle.
앫 Cycle the ignition to clear faults after ABS
servicing.
Component
Message Fault
Message Data
Error
Component
Message Fault
Message Data
Error
Component
Message Fault
Message Data
Error
WABCO Maintenance Manual MM-0951 (Revised 08-18)
41
2 Diagnostics, Troubleshooting and Testing
Table B: Radar Software Version USO 2.XXXX Fault Code Table
Fault Code
SPN/FMI
Disp
layed
Description Fault Description Repair Instructions
Troubleshooting
Section
Sub-Section
86387/19 Brake Control Data
Error
86388/19 Brake Control Data
Error
86390/19 Engine Control
Data Error
86391/19 Engine Data Error Invalid engine speed signal in
Invalid acceleration limit
signal in EBC5 message
Invalid foundation brake use
signal in EBC5 message
Invalid actual percent torque
signal in EEC1 message
EEC1 message
앫 Verify ABS ECU is functional.
앫 Verify the correct ABS ECU part number is
used on this vehicle.
앫 Cycle the ignition to clear faults after ABS
servicing.
앫 Verify ABS ECU is functional.
앫 Verify the correct ABS ECU part number is
used on this vehicle.
앫 Cycle the ignition to clear faults after ABS
servicing.
앫 Verify engine ECU is functional and has correct
parameters and software downloaded from
the engine database.
앫 Verify the correct engine ECU part number is
used on this vehicle.
앫 Cycle the ignition to clear faults after engine
servicing.
앫 Verify engine ECU is functional and has correct
parameters and software downloaded from
the engine database.
앫 Verify the correct engine ECU part number is
used on this vehicle.
Component
Message Fault
Message Data
Error
Component
Message Fault
Message Data
Error
Component
Message Fault
Message Data
Error
Component
Message Fault
Message Data
Error
86395/19 Driveline Retarder
Data Error
86396/19 Driveline Retarder
Control Data Error
42
WABCO Maintenance Manual MM-0951 (Revised 08-18)
Invalid actual retarder
percent torque signal in
ERC1_DR message
Invalid retarder selection, non
engine signal in ERC1_DR
message
앫 Cycle the ignition to clear faults after engine
servicing.
앫 Verify driveline retarder ECU is functional and
has correct parameters and software.
앫 Verify the correct driveline retarder ECU part
number is used on this vehicle.
앫 Cycle the ignition to clear faults after driveline
retarder servicing.
앫 Verify driveline retarder ECU is functional and
has correct parameters and software.
앫 Verify the correct driveline retarder ECU part
number is used on this vehicle.
앫 Cycle the ignition to clear faults after driveline
retarder servicing.
Component
Message Fault
Message Data
Error
Component
Message Fault
Message Data
Error
Table B: Radar Software Version USO 2.XXXX Fault Code Table
Fault Code
SPN/FMI
Disp
layed
Description Fault Description Repair Instructions
2 Diagnostics, Troubleshooting and Testing
Troubleshooting
Section
Sub-Section
86397/19 Driveline Retarder
Control Data Error
86398/19 Transmission
Control Data Error
86399/19 Transmission
Control Data Error
86402/19 Virtual Target
Distance Error
Invalid actual maximum
available retarder percent
torque signal in ERC1_DR
message
Invalid shift in process signal
in ETC1 message
Invalid driveline engaged
signal in ETC1 message
Invalid distance signal in
VTRGT message
앫 Verify driveline retarder ECU is functional and
has correct parameters and software.
앫 Verify the correct driveline retarder ECU part
number is used on this vehicle.
앫 Cycle the ignition to clear faults after driveline
retarder servicing.
앫 Verify transmission ECU is functional and has
correct parameters and software.
앫 Verify the correct transmission ECU part
number is used on this vehicle.
앫 Cycle the ignition to clear faults after
transmission servicing.
앫 Verify transmission ECU is functional and has
correct parameters and software.
앫 Verify the correct transmission ECU part
number is used on this vehicle.
앫 Cycle the ignition to clear faults after
transmission servicing.
앫 If error occurs, contact WABCO North America
Customer Care at 855-228-3203 for further
assistance.
Component
Message Fault
Message Data
Error
Component
Message Fault
Message Data
Error
Component
Message Fault
Message Data
Error
Component
Replacement
Radar Sensor
Replacement
86403/19 Virtual Target Rel
Speed Error
86404/19 Engine Control
Data Error
Invalid relative speed signal
in VTRGT message
Invalid accelerator pedal
position signal in EEC2
message
앫 If error occurs, contact WABCO North America
Customer Care at 855-228-3203 for further
assistance.
앫 Use OnGuard display “COMPONENT TEST”
screen to verify accelerator pedal position
sensor is operational.
앫 Verify engine ECU is functional and has correct
parameters and software downloaded from
the engine database.
앫 Verify the correct engine ECU part number is
used on this vehicle.
앫 Cycle the ignition to clear faults after engine
servicing.
WABCO Maintenance Manual MM-0951 (Revised 08-18)
Component
Replacement
Radar Sensor
Replacement
Component
Message Fault
Message Data
Error
43
2 Diagnostics, Troubleshooting and Testing
Table B: Radar Software Version USO 2.XXXX Fault Code Table
Fault Code
SPN/FMI
Displayed
Description Fault Description Repair Instructions
Troubleshooting
Section
Sub-Section
86405/19 Brake Control Data
Error
86406/19 Engine Retarder
Control Data Error
Invalid brake pedal position
% signal in EBC1 message
Invalid
ER_ACT_PERCENTAGE
signal in ERC1 message
앫 Use OnGuard display “COMPONENT TEST”
screen to verify brake pedal position (BPP)
sensor is operational.
앫 Verify ABS ECU is functional.
앫 Verify the correct ABS ECU part number is
used on this vehicle.
앫 Inspect BPP sensor harness for damage.
앫 Verify BPP sensor connector is secured.
앫 Check for debris, ice, water, oil, etc., in air
system.
앫 Replace BPP sensor if required.
앫 Replace ABS ECU if required.
앫 Verify engine ECU is functional and has correct
parameters and software downloaded from
the engine database.
앫 Verify the correct engine ECU part number is
used on this vehicle.
앫 Cycle the ignition to clear faults after engine
servicing.
ABS System
Brake Pedal
Position Sensor
Component
Message Fault
Message Data
Error
86407/19 Cruise Control
Data Error
86408/19 Cruise Control
Data Error
Invalid signal <set switch> in
CCVS message
Invalid signal <resume
switch> in CCVS message
앫 Verify engine or vehicle body/chassis ECU is
functional and has correct parameters and
software.
앫 Verify the correct engine ECU part number is
used on this vehicle.
앫 Cycle the ignition to clear faults after engine
servicing.
앫 Verify engine or vehicle body/chassis ECU is
functional and has correct parameters and
software.
앫 Verify the correct engine ECU part number is
used on this vehicle.
앫 Cycle the ignition to clear faults after engine
servicing.
Component
Message Fault
Message Data
Error
Component
Message Fault
Message Data
Error
44
WABCO Maintenance Manual MM-0951 (Revised 08-18)
Table B: Radar Software Version USO 2.XXXX Fault Code Table
Fault Code
SPN/FMI
Displayed
Description Fault Description Repair Instructions
2 Diagnostics, Troubleshooting and Testing
Troubleshooting
Section
Sub-Section
86409/19 Unlisted DM1 Error
or Cruise Control
Data Error
86411/19 Unlisted DM1 Error
or Cruise Control
Data Error
86412/19 Cruise Control
Data Error
86416/13 Yaw Offset or H
Align Error
86417/13 Radar H Alignment
Error
86466/7 Suspension Height
Error
Invalid signal <pause
switch> in CCVS message
Invalid signal <vehicle
speed> in CCVS message
Invalid signal <cruise control
low set limit speed> in CCVS
message
Radar horizontal alignment
error or yaw rate sensor
invalid signal
Radar alignment error 앫 Realign radar using sensor alignment
Air suspension is not at
normal driving level
앫 Verify engine or vehicle body/chassis ECU is
functional and has correct parameters and
software per OEM specifications.
앫 Verify the correct engine ECU part number is
used on this vehicle.
앫 Cycle the ignition to clear faults after engine
servicing.
앫 Verify engine or vehicle body/chassis ECU is
functional and has correct parameters and
software per OEM specifications.
앫 Verify the correct engine ECU part number is
used on this vehicle.
앫 Cycle the ignition to clear faults after engine
servicing.
앫 Check cruise control minimum speed setting
on engine ECU.
앫 Verify the correct engine ECU part number is
used on this vehicle.
앫 Cycle the ignition to clear faults after engine
servicing.
앫 Verify the condition of the radar mounting and
hardware.
앫 Realign the radar sensor using the alignment
procedure.
앫 Check the display for the number of fault
occurrences.
앫 If none of the above resolves the issue,
contact WABCO North America Customer Care
at 855-228-3203 for further assistance.
procedure.
앫 Adjust ECAS driving height parameter. Component
Component
Message Fault
Message Data
Error
Component
Message Fault
Message Data
Error
Component
Message Fault
Message Data
Error
Radar System
Radar Sensor
Alignment
Radar System
Radar Sensor
Alignment
Message Fault
Message Data
Error
WABCO Maintenance Manual MM-0951 (Revised 08-18)
45
2 Diagnostics, Troubleshooting and Testing
Table B: Radar Software Version USO 2.XXXX Fault Code Table
Fault Code
SPN/FMI
Displayed
Description
Fault Description Repair Instructions
Troubleshooting
Section
Sub-Section
86516/14 Radar Blocked or
Align
86517/14 Radar Blocked or
Align
86566/12 Engine Ignores
ACC Control
86567/1 Brake Control Data
Error
Radar signal attenuation. No
target vehicle detected with
vehicle moving > 6 mph
(10 km/h)
No target detected for
2 minutes with vehicle
moving > 6 mph (10 km/h)
Engine does not accept TSC1
commands from ACC
Invalid ABS fully operational
signal in EBC1 message
앫 Determine if radar sensor is blocked by snow,
ice or dirt.
앫 Clean surface of fascia and between fascia
and radar sensor.
앫 Verify correct fascia is installed correctly.
앫 Determine if radar sensor is blocked by snow,
ice or dirt.
앫 Clean surface of fascia and between fascia
and radar sensor.
앫 Verify correct fascia is installed correctly.
앫 Verify correct engine parameters are for ACC.
앫 Reprogram engine parameters if not correct.
앫 Check for multiple faults using OnGuard
display. If multiple faults, this is a secondary
fault caused by other faults. Correct other
faults and cycle ignition to clear this fault.
앫 If single fault, is probably gateway issue.
앫 Verify ABS ECU is functional.
앫 Verify the correct ABS ECU part number is
used on this vehicle.
앫 Cycle the ignition to clear faults after ABS
service.
Radar System
Radar Blocked
Radar System
Radar Blocked
Cruise Control
System
Programming
Faults
Component
System Fault
Engine Ignores
ACC Control Fault
Component
Message Fault
Message Data
Error
86616/7 BPP Sensor Fault No BPP signal >0 for the last
3 braking maneuvers
(< 1.5m/s2) without ACC
active
46
WABCO Maintenance Manual MM-0951 (Revised 08-18)
앫 Use OnGuard display “ACC FUNCTION” screen
to verify brake pedal position (BPP) sensor is
operational.
앫 Verify ABS ECU is functional.
앫 Verify the correct ABS ECU part number is
used on this vehicle.
앫 Inspect BPP sensor harness for damage.
앫 Verify BPP sensor is secured.
앫 Check for debris, ice, water, oil, etc., in air
system blocking the BPP.
앫 Replace BPP sensor if required.
앫 Replace ABS ECU if required.
ABS System
Brake Pedal
Position (BPP)
Sensor Fault
2 Diagnostics, Troubleshooting and Testing
WARNING
Hazard Alert Messages
Read and observe all Warning and Caution hazard alert messages in
this publication. They provide information that can help prevent
serious personal injury, damage to components, or both.
To prevent serious eye injury, always wear safe eye protection
when you perform vehicle maintenance or service.
Release all air from the air systems before you remove any
components. Pressurized air can cause serious personal
injury. Refer to the vehicle manufacturer’s service manual for
instructions.
Radar Inspection and Preventive
Maintenance
Radar Inspection
NOTE: It is recommended to perform the radar inspection process
any time normal preventive maintenance is performed on the
vehicle.
1. If the radar harness connector is on the top of the radar, the
radar fascia should be oriented so the wording “OnGuard™” is
on the top and is rightside up. If the radar harness connector is
on the bottom of the radar, the radar fascia should be oriented
so the wording “OnGuard™” is on the bottom and is rightside
up. If the fascia has a “chin” rather than the “OnGuard”
wording, the “chin” should be oriented over the radar
connector, either on the top or on the bottom respectively.
2. Remove the fascia and look at the bumper positioning. Check if
the bumper is physically touching the radar sensor or mounting
bracket at any point.
앫 If the bumper is touching the fascia: Reposition the
bumper so there is a minimum of 1/4-inch (6.35 mm)
clearance between it and the fascia at all points.
3. Visually inspect the radar connector, housing, ball socket clips,
screws, through-hole adjusters and rivets for any damage.
Inspect the top and bottom edge of the radar for any signs of
wear or prior contact with the bumper. Also, inspect the routing
of the radar sensor harness to ensure it is not pinched in the
bumper or damaged at any point. For Century Class tractors,
refer to WABCO PIL 504 for more information. The rubber boot
on the radar harness connector must be fully covering the
connector.
4. Grab onto the radar sensor and gently wiggle it back and forth.
You should not feel any slack or movement in the screws, ball
socket clips, through-hole adjusters or rivets. The radar sensor
should be securely mounted at all three positions.
5. If the radar passes all of these inspections, verify correct
vertical and horizontal alignment according to the Radar Sensor
Alignment procedure in this section.
Radar System Troubleshooting
Refer to Fault Code Table A and Table B for further information.
The following sections and sub-sections are the troubleshooting
sections and sub-sections referenced in the last column of Fault
Code Tables A and B.
Radar Sensor Connector Corrosion
Radar sensor connector corrosion has been found on vehicles where
the radar sensor connector or protective rubber boot has been
incorrectly installed following service. When the connector is not
fully seated during installation or repair activities, water, corrosive
road salts or other contaminants can enter the radar sensor
connector. When salt water interacts with electrical current,
corrosion occurs quickly. When this occurs, severe corrosion can
occur on the radar sensor and harness pins. If this corrosion is not
detected early enough, a fault may be generated and the radar
sensor and radar sensor harness may need to be replaced.
Corrosion in the connector may also occur if the radar sensor
harness becomes damaged somewhere along the length of the
harness. Water and corrosive road salts can wick down the harness
and into the radar sensor connector. If damage to the harness is
detected early enough, damage to the radar sensor connector can
be avoided.
WABCO Maintenance Manual MM-0951 (Revised 08-18)
47
2 Diagnostics, Troubleshooting and Testing
Radar Blocked
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
“Radar Blocked” fault 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 packed snow or ice that may form in
this area.
3. Verify that the radar electrical harness is not hanging in front of
the sensor.
4. Verify that the radar sensor is aligned correctly. Refer to the
Radar Alignment procedure in this section.
5. Verify the fascia is installed and oriented correctly.
6. Cycle the ignition OFF for 1 minute to clear the fault. The
vehicle must be driven for up to 90 minutes to determine if the
fault has been corrected.
To correctly inspect the integrity of the radar mounting
hardware, hold on to the radar and wiggle it back and forth.
There should not be any physical or visual movement or slack
in the radar, ball socket clips, screws, through-hole adjusters
or rivets. Ensure there is at least 1/4-inch (6.35 mm) of
clearance between the radar sensor and the bumper in all
directions. Contact between the radar sensor and bumper can
cause damage to the through-hole adjusters, ball socket clips
and radar screws. Adjust, repair or replace the screws, ball
socket clips or through-hole adjusters as necessary.
Depending on vehicle make and model, radar units may be
mounted with the connector on top or with the connector on
the bottom. This changes the location of the horizontal and
vertical sensor adjustment screws. Figure 2.25.
Figure2.25
RADAR CONNECTOR ON TOP
7. If the fault re-occurs, refer to the Radar Sensor Replacement
procedure in Section 3.
Radar Sensor Alignment
If the radar sensor is not aligned correctly, the system may:
앫 Track targets that are not directly ahead of the vehicle.
앫 Not track vehicles within the expected range of the system.
The radar must be correctly aligned in two axes for correct operation
(vertically and horizontally).
NOTE: The radar alignment screws may be a T15 or a T20 Torx
head. Using the incorrect size will result in damage and difficulty in
removing. If damage to the Torx head occurs, replace with T20 Torx
screws. Take care not to use excessive torque on the screws,
thereby stripping the heads.
1. The vehicle must be parked on a flat level surface. The
suspension must be at a standard ride height (air system fully
charged for air-suspended vehicles).
2. Before starting the alignment procedure, visually verify that all
three radar alignment screws are fully seated in the screw ball
sockets, the ball sockets are not damaged or missing and the
radar sensor is not loose.
VERTICAL
SCREW
RADAR CONNECTOR ON BOTTOM
Figure 2.25
HORIZONTAL
SCREW
VERTICAL
SCREW
4007304a
3. Remove the radar fascia from the front of the vehicle.
Figure 2.26.
Figure2.26
RADAR
FASCIA
4007305a
Figure 2.26
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WABCO Maintenance Manual MM-0951 (Revised 08-18)
2 Diagnostics, Troubleshooting and Testing
4007306a
DIGITAL LEVEL
00
ZERO
ON/OFF
4007307a
LEVEL ON RADAR SENSOR
4. Set vertical alignment using a digital level. Figure 2.27. Set the
digital level flat on the tool reference surface of the sensor and
press ZERO to set the level to 0.0 degrees. The tool reference
surface must be level with the surface under the vehicle tires.
(One source for a digital level is http://www.wixey.com/
anglegauge/index.html: Model Wixey WR 300.)
Figure2.27
Figure 2.27
5. Position the digital level on the outside metal edge of the radar
sensor surface. Figure 2.28. Adjust the vertical alignment
screw until the digital level reads 90.0 0.1 degrees.
Figure2.28
앫 Only when there is a Green screen can the sliding bar be
used to determine the need for adjustment.
앫 Allow several seconds for the indicator to settle into one
position after the screen turns green.
앫 The indicator will move if the vehicle or target change their
relative position while driving. For best results, attempt to
remain centered in the lane without moving from side to
side.
NOTE: When tracking a target vehicle, allow the distance to
gradually increase to at least 300 feet (91 meters) and wait for
the indicator to settle before making any adjustments to the
horizontal alignment screw. Making any horizontal adjustments
based on following distances less than 300 feet (91 meters)
could cause the radar to be incorrectly aligned.
NOTE: If the radar will not track a vehicle out to at least
300 feet (91 meters), it is a good indication that the radar is
severely misaligned.
Figure2.29
HORIZONTAL ADJUSTMENT SCREW
DIRECTION INDICATORS
RADAR ALIGNMENT
Target Distance N/A
Figure 2.28
6. For horizontal alignment, the vehicle must be driven and a
target vehicle must be tracked. Start the engine and select
the OnGuard Driver Display “Radar Alignment” screen by
pressing the “MODE” button twice. Figure 2.29 and
Figure 2.30.
Drive on a smooth, level and straight road with traffic. Watch
the sliding indicator bar on the screen. A Green screen
indicates the target is being tracked, a Blue screen indicates
the radar is searching and no target is being tracked.
RSC Mass Est 144458 lb
SLIDING BARTIC MARK
4008863a
RADAR CONNECTOR ON TOP
Figure 2.29
Figure2.30
HORIZONTAL ADJUSTMENT SCREW
DIRECTION INDICATORS
RADAR ALIGNMENT
Distance to Target
RSC Mass Est
SLIDING BARTIC MARK
4008864a
RADAR CONNECTOR ON BOTTOM
Figure 2.30
WABCO Maintenance Manual MM-0951 (Revised 08-18)
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2 Diagnostics, Troubleshooting and Testing
The sliding bar indicates whether the horizontal alignment
screw must be adjusted. The horizontal alignment screw on the
radar must be turned in the direction indicated at the end of the
scale on the display. Each “tic” mark represents one full turn of
the horizontal alignment screw. Note the position of the sliding
indicator and count the number of marks to the center arrows
when tracking a vehicle.
Turn the horizontal alignment screw on the radar one full turn
counterclockwise or clockwise for each mark counted. Repeat
the procedure until the slider bar is within 1 mark of the
center arrows on the OnGuard Radar Alignment screen. After
completing the alignment, attach the fascia and verify radar
alignment tracking to 350-400 feet on a smooth, level and
straight road. If the distance to target is less than 350 feet,
readjust the vertical alignment. Typically, in this case, the radar
alignment must be adjusted to aim the radar higher.
Radar RF Interference Fault
On rare occasions the OnGuard Collision Safety System may
experience radio frequency interference issues. If a radio
interference fault code is detected, the following should be
performed:
1. Cycle the ignition OFF for several minutes and then back ON.
Observe the display for correct system operation. If the fault
does not re-occur, the repair is completed.
Radar Multiple Reset Fault
On rare occasions the radar sensor may need to be restarted
multiple times to recover from certain system issues. Perform the
following if a sensor multiple reset fault code is present:
1. Cycle the ignition from OFF to ON several times. Wait for the
display to turn from a red screen to the blue vehicle screen
between each ignition cycle. If the fault does not re-occur after
the completion of five ignition cycles, the repair is completed.
2. If the fault re-occurs, replace the radar sensor per the Radar
Sensor Replacement procedure.
Radar Over Temperature Fault
During vehicle operation it is possible to block the flow of air across
the radar sensor and the radiator. If this occurs, the radar sensor
may become overheated causing an Over Temperature fault code.
This may occur if the radar sensor is above 80C (176F). Perform
the following if a radar over temperature fault code is present:
1. Determine if the radar sensor may have been exposed to
excessive temperature during vehicle operation. If the vehicle
became overheated (i.e., loss of engine coolant, severe hill
climbs followed by stopping, etc.), allow the vehicle to cool
down to normal operating temperature. Turn the ignition ON
and determine if the over temperature fault code is still
present. If not present, the repair is complete.
2. If the fault does re-occur, move the vehicle to another location
at least 1/4 mile from the current location.
3. Cycle the ignition OFF for several minutes and then back ON.
Observe the display for correct system operation. If the fault
does not re-occur, the repair is completed.
4. If the fault re-occurs, replace the radar per the Radar Sensor
Replacement procedure.
Radar Reset Fault
On rare occasions a sensor reset fault may occur. If this occurs, the
radar sensor may need to be restarted to recover from system
issues. Perform the following if a sensor reset fault code is present:
1. Cycle the ignition OFF and then back ON. Observe the display
for correct system operation. If the fault does not re-occur, the
repair is completed.
2. If the fault re-occurs, replace the radar sensor per the Radar
Sensor Replacement procedure in Section 3.
2. Inspect the area around the sensor for debris that may have
become lodged. Remove the debris if found. Allow the vehicle
to cool down to normal operating temperature. Turn the ignition
ON and determine if the over temperature fault code is still
present. If not present, the repair is complete.
3. If the fault re-occurs, replace the radar sensor per the Radar
Sensor Replacement procedure.
Radar Under Temperature Fault
During vehicle operation at extremely low temperatures it is possible
to observe a radar sensor low temperature fault. This will occur
when the radar sensor is exposed to temperatures at or below
42C (43.6F). Perform the following if the radar under
temperature fault code is present:
1. Move the vehicle into a location with the temperature warmer
than 60F. Verify that no ice or snow is surrounding the radar
sensor.
2. Allow the vehicle to warm up for one hour.
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WABCO Maintenance Manual MM-0951 (Revised 08-18)
2 Diagnostics, Troubleshooting and Testing
3. Turn the ignition ON and determine if the under temperature
fault code is still present. If not present, the repair is complete.
4. If the fault re-occurs, replace the radar sensor per the Radar
Sensor Replacement procedure in Section 3.
Electrical System and Harnesses
Troubleshooting
Refer to Table A and Table B for further information.
The following sections and sub-sections are the troubleshooting
sections and sub-sections referenced in the last column of Fault
Code Tables A and B.
The following procedures require a multi-meter. Note that during pin
probing, damage to connector pins can result if the probe exceeds
the recommended maximum diameter. For the radar sensor, the
maximum diameter is 0.015 inch (1/64 inch). For the OnGuard
Display connector, the maximum diameter is 0.03 inch (1/32 inch).
Harness Routing and Associated Wire Fatigue or
Abrasion
Wire fatigue will occur at any harness location where sufficient
harness motion allows bending of the wiring. When this occurs,
individual harness wires become weakened and can break. The
harness can have intermittent or permanent open circuit failures
causing the OnGuard Collision Safety System to malfunction.
Harness abrasion will occur at any harness location where sufficient
harness motion allows rubbing of the harness against adjacent
vehicle components. When this occurs, the outer harness jacket and
the individual wire insulation can wear, causing short circuits
between each of the exposed wires or to the vehicle chassis causing
the OnGuard Collision Safety System to malfunction. The harness is
especially susceptible to wear when the harness rubs against a
sharp edge.
Both wire fatigue and harness abrasion can be prevented by
correctly attaching the harness to the chassis at closely spaced
intervals while avoiding contact with sharp edges. The harness
should be secured with tie wraps every two feet or less in areas
where damage may occur. Tie wraps should be tightened with a tie
wrap gun set to the appropriate setting to correctly secure the
harness without allowing a loose mounting but also not causing the
harness to be over-tightened. Over-tightening the tie wrap to the
harness can crush the harness jacket and conductors causing
harness damage and system failures.
At the radar sensor connector location, a harness clip correctly
locates the harness. The harness clip provides a secure mounting of
the harness to ensure the wiring near the connector does not
fatigue. Harnesses installed without this harness clip correctly
installed can become damaged near the radar sensor connector.
Radar Harness Electrical Checks
The radar harness is connected to the radar sensor using a six pin
connector. Figure 2.31. The following harness check should be
followed when various fault codes occur. Refer to Troubleshooting
Guide, Table A and Table B for further information.
Figure2.31
456
123
1. 12 V IGNITION
2. NOT USED
3. NOT USED
Figure 2.31
Disconnect the radar harness connector and perform the following
procedures.
1. Key On/Engine Off — Check Pin 1 (power) to Pin 6 (ground) for
12 volts.
앫 If the power shows 12 volts, go to step 2.
앫 If the power is less than 12 volts, trace and inspect the
harness for severe abrasion or kinks that might crush or cut
wires and check all connections for corrosion or connector
damage. If any damage is found, repair and replace as
necessary.
2. Key Off/Engine Off — Check Pin 6 (ground) to chassis for
resistance of less than 1 ohm.
앫 If the resistance is less than 1 ohm, go to step 3.
앫 If the resistance is higher than 1 ohm, trace and inspect the
harness for severe abrasion or kinks that might crush or cut
wires and check all connections for corrosion or connector
damage. Over tightened tie wraps may cause this type of
damage. If any damage or corrosion is found, repair and
replace as necessary. Clean connector corrosion using
electrical contact cleaner.
4. J1939 HI
5. J1939 LO
6. GROUND
4005647b
WABCO Maintenance Manual MM-0951 (Revised 08-18)
51
2 Diagnostics, Troubleshooting and Testing
3. Key On/Engine Off — Perform a load test across Pins 1 and 6
by connecting a 12-volt headlight or test lamp to the pins.
앫 If the lamp illuminates correctly, go to step 4.
앫 If the lamp does not illuminate, trace and inspect the
harness for severe abrasion or kinks that might crush or cut
wires and check all connections for corrosion or connector
damage. Over tightened tie wraps may cause this type of
damage. If any damage or corrosion is found, repair and
replace as necessary. Clean connector corrosion using
electrical contact cleaner.
4. Key Off/Engine Off — Check across Pins 4 and 5 (SAE J1939)
for resistance of 60 ohms.
앫 If the resistance between Pins 4 and 5 is greater than
120 ohms, check if both SAE J1939 circuits are open or if
both termination resistors are missing.
앫 If the resistance between Pins 4 and 5 is equal to
120 ohms, one of the SAE J1939 circuits is open or one of
the termination resistors is missing.
앫 If the resistance between Pins 4 and 5 is less than 60
ohms, more than two termination resistors are installed, the
SAE J1939 harness is shorted or one or more ECUs on the
SAE J1939 network are damaged. If so, remove each ECU
connected to the SAE J1939 network one by one until the
bus resistance returns to 60 ohms. Repair and replace as
necessary.
NOTE: Make sure to check the firewall pass-thru
connections for loose or broken connections.
Figure2.32
BACK OF DISPLAY
4007311a
Figure 2.32
Remove the dash to access the back of the OnGuard Display and
harness connector. Figure 2.33.
Figure2.33
DISPLAY HARNESS CONNECTOR WITH PINS
NOT USED
12V IGNITION
GROUND
NOT USED
Figure 2.33
DISPLAY WIRING
DISPLAY
CONNECTOR
EF
D
CBA
NOTE: Letters appear
on back side of connector.
J1939 HI
J1939 LO
4007309a
5. If no problems are found with the harness, 12V is present at
the radar harness connector and the SAE J1939 bus
resistance is 60 ohms, replace the radar sensor per the Radar
Sensor Replacement procedure in Section 3.
6. Pins 2 and 3 are not used.
Display Harness Electrical Checks
The display harness is connected to the OnGuard Display mounted
in the dashboard. Figure 2.32. The following harness checks should
be followed when various fault codes occur. Refer to
Troubleshooting Guide, Table A and Table B for further information.
52
WABCO Maintenance Manual MM-0951 (Revised 08-18)
Disconnect the OnGuard Display harness connector and perform the
following electrical checks.
1. Key On/Engine Off — Check Pin E (power) to Pin D (ground) for
12 volts.
앫 If power shows 12 volts, go to step 2.
앫 If power shows less than 12 volts, trace and inspect the
harness for severe abrasion or kinks that might crush or cut
wires and check all connections for corrosion or connector
damage. If damage is found, repair and replace as
necessary.
2. Key Off/Engine Off — Check Pin D (ground) to chassis for
resistance of less than 1 ohm.
앫 If the resistance is less than 1 ohm, go to step 3.
2 Diagnostics, Troubleshooting and Testing
앫 If the resistance is higher than 1 ohm, trace and inspect the
harness for severe abrasion or kinks that might crush or cut
wires and check all connections for corrosion or connector
damage. If damage is found, repair and replace as
necessary.
3. Key On/Engine Off — Perform a load test across Pins E and D
by connecting a 12-volt headlight or test lamp to the pins.
앫 If the lamp illuminates correctly, go to step 4.
앫 If the lamp does not illuminate, trace and inspect the
harness for severe abrasion or kinks that might crush or cut
wires and check all connections for corrosion or connector
damage. If damage is found, repair and replace as
necessary.
4. Key Off/Engine Off — Check across Pins A and B (SAE J1939)
for resistance of 60 ohms.
앫 If the resistance is 120 ohms, check the two termination
resistors. Each should measure 110-130 ohms across the
resistor pins. If each individual resistor does not measure
110-130 ohms, replace the bad termination resistor.
앫 Check harness SAE J1939 circuits for open or shorts. If the
resistance between Pins A and B is greater than 120 ohms,
both SAE J1939 circuits are open or both termination
resistors are missing. Repair and replace as necessary.
앫 If the resistance between Pins A and B is equal to 120
ohms, one of the SAE J1939 circuits is open or one of the
termination resistors is missing. Repair and replace as
necessary.
앫 If the resistance between Pins A and B is less than
60 ohms, more than two termination resistors are installed,
the SAE J1939 harness is shorted or one or more ECUs on
the SAE J1939 network are damaged. Remove each ECU
connected to the bus one by one until the bus resistance
returns to 60 ohms. Repair and replace as necessary.
NOTE: Make sure to check the firewall pass-thru
connections for loose or broken connections.
5. If no problems are found in the harness, 12V is present at the
display connector, the SAE J1939 network resistance is
60 ohms and the connector is correctly installed, replace the
display per the display replacement procedure in Section 3.
System Voltage Fault
Occasionally the vehicle battery, voltage regulator or alternator can
cause the OnGuard Collision Safety System to generate high or low
voltage faults. Refer to the Key ON section of the Radar Harness
Electrical Check in this section to determine if correct power is
supplied to the system if a radar undervoltage or overvoltage fault
code is present. Troubleshoot the vehicle alternator, battery and
voltage regulator as required.
SAE J1939 Network
SAE J1939 network communication errors can occur if all
components interacting with the OnGuard Collision Safety System
are not correctly connected to the network, are transmitting at a
different rate than expected or the termination resistors are missing
or not correctly positioned at the ends of the SAE J1939 network.
Perform the Radar Harness Electrical Check in this section if a radar
SAE J1939 network fault code is present.
Display Message Timeout Error
Occasionally the OnGuard Collision Safety System will generate
Display Message Timeout faults because the OnGuard Display has
stopped sending messages to the radar sensor at a 250 ms rate.
This can be caused by an intermittent OnGuard Display power or
intermittent SAE J1939 data link connection. Perform the Display
Harness Electrical Checks in this section if a Display Message
timeout fault code is present.
Display Message Data Error
If the Display Message fault occurs, replace the display per the
Display Replacement procedure in Section 3.
Component Message Fault
Troubleshooting
Refer to Table A and Table B for further information.
The following sections and sub-sections are the troubleshooting
sections and sub-sections referenced in the last column of Fault
Code Tables A and B.
6. Pins C and F are not used.
WABCO Maintenance Manual MM-0951 (Revised 08-18)
53
2 Diagnostics, Troubleshooting and Testing
Message Timeout
Occasionally the OnGuard Collision Safety System will generate
Message Timeout faults due to data not being received from the
ECUs connected on the SAE J1939 network. This can occur if the
cruise control, engine, transmission, ABS, tachograph, engine
retarder or driveline retarder ECUs have been re-flashed with new
software that is incorrect, was not downloaded correctly or has the
incorrect parameter set. This information may reside in the vehicle
OEM ECU database. It is also possible that various ECUs are not
operating correctly on the SAE J1939 network or faults have
occurred during diagnostic procedures. Perform the following
procedure if a Message Timeout fault code is present:
NOTE: Certain diagnostic software programs, other than
TOOLBOX™, can generate Timeout faults. Verify code is Active on
the display without any other diagnostic software connected to the
vehicle.
1. Determine if the software or parameter set from the
appropriate ECU has recently been modified. Install the correct
software and parameter set if required.
2. Verify that the SAE J1939 network is functioning correctly. Use
the Radar Harness Electrical Checks procedure to repair any
SAE J1939 network issues.
3. After any ECU servicing has been completed, cycle the ignition
OFF for one minute and then back ON for one minute with the
engine idling to clear the OnGuard fault. Verify that the fault
has been cleared.
3. Use the OnGuard display to determine if the various functions
(i.e., set, resume, accel, coast, etc.) are functioning correctly.
Consult the OnGuard display operating instructions for more
information.
4. After ECU servicing has been completed, cycle the ignition OFF
for one minute and then back ON for one minute with the
engine idling to clear the OnGuard fault. Verify that the fault
has been cleared.
Engine Ignores ACC Control Fault
The Engine Ignores ACC Control fault may be generated due to other
vehicle system faults or issues. Check for multiple OnGuard faults
using the OnGuard display. If multiple faults are present, the Engine
Ignores ACC Fault is most likely a secondary fault. Take corrective
action for the primary fault first and cycle the ignition. Document all
faults present. If the other faults are corrected and the Engine
Ignores ACC fault is still present, then the Engine Ignores ACC
Control fault becomes the primary fault. There is a communication
issue with the other vehicle systems. Verify the Engine and Gateway
ECU software is up-to-date and cycle the ignition.
Cruise Control System Troubleshooting
Refer to Table A and Table B for further information.
The following sections and sub-sections are the troubleshooting
sections and sub-sections referenced in the last column of Fault
Code Tables A and B.
Programming Faults
Message Data Error
Occasionally the OnGuard Collision Safety System will generate
Message Data Error faults from ECUs connected on the SAE J1939
network. This can occur if an ECU has been re-flashed with new
software that is incorrect, was not downloaded correctly or has the
wrong parameter set. This information resides in the OEM ECU
database. It is also possible that the problem ECU was replaced with
the wrong ECU. Perform the following procedure if a Message Data
Error fault code is present:
1. Determine if the appropriate ECU has been recently replaced.
Verify that the correct ECU part number has been installed.
Install the correct ECU if required.
2. Determine if the ECU software or parameter set have recently
been modified. Install the correct software and parameter set if
required.
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WABCO Maintenance Manual MM-0951 (Revised 08-18)
1. Verify with the OEM or engine manufacturer that the correct
engine parameters are programmed to accept TSC1 messages
from the Adaptive Cruise Control (ACC).
2. Reprogram the engine parameters if not correct. Refer to the
vehicle manufacturer’s service manual for further instruction.
3. Check for multiple faults using the OnGuard Display. If there
are multiple faults, this is a secondary fault caused by other
faults.
4. Correct the other faults and cycle ignition to clear this fault. If it
is a single fault, update the engine and vehicle gateway
software.
2 Diagnostics, Troubleshooting and Testing
4007313a
2 GROUND
BRAKE PEDAL POSITION SENSOR CONNECTOR
4 NO CONNECTION
3 SIGNAL
1 12V IGNITION
Anti-lock Braking System (ABS)
Troubleshooting
Refer to Table A and Table B for further information.
The following sections and sub-sections are the troubleshooting
sections and sub-sections referenced in the last column of Fault
Code Tables A and B.
Brake Pedal Position (BPP) Sensor Fault
Occasionally a BPP sensor may become damaged or contaminated
by the air system. To determine if the BPP sensor is operating
correctly, perform the following procedure:
1. Turn ON the ignition and wait for OnGuard to power up.
2. Operate the OnGuard Display MODE button until the “ACC
Function” or “Component Test” screen is displayed. Then
press the down button until the “Brake Pedal Position” is
displayed.
3. With the brake pedal not depressed, the brake pedal should
display 0%. As the brake pedal is depressed, the display
should advance from 0% pedal on to approximately 70% with
the brake pedal fully depressed. If the display goes from 0% to
approximately 70%, the test is completed.
NOTE: The highest value of Brake Pedal Position is dependent
on the air pressure in the brake system. It is common for
values less than 100% to be displayed with the brake pedal
fully depressed.
4. If the display does not advance as described, the BPP sensor
may be damaged, blocked by air system contaminants (water,
ice, oil, etc.) or the harness and connections may be damaged.
Figure 2.34.
Figure2.34
5. Inspect the harness for damage and repair if damaged.
Disconnect the wiring harness at the BPP sensor. Verify 12V is
present at Pins 1 and 2 of the BPP sensor harness connector.
If 12V is not present, correct the harness issue. Refer to the
ABS service manual MM-0112 and the vehicle manufacturer’s
service manual for further instructions.
6. Reconnect the wiring harness and cycle the ignition OFF for
30 seconds and then back ON. Using the OnGuard Display,
verify if the BPP sensor is now operating correctly. If OK, the
repair is completed.
7. If the BPP sensor is still not operating correctly, remove the
sensor from the air line and verify that the BPP sensor output is
0%. If not at 0% call WABCO North America Customer Care at
855-228-3203 for further instructions. The BPP sensor may
not be operating correctly, and if so, remove the BPP sensor
from the vehicle and replace it.
8. If the BPP sensor output is 0% with the sensor still
disconnected from the vehicle, blow into the sensor port and
verify the output increases as air pressure increases.
9. If the BPP sensor output does increase, inspect the air system
for contamination and repair as needed.
10. If the BPP sensor output does not increase while blowing in the
sensor port, replace the BPP Sensor. Refer to the ABS service
manual and the vehicle manufacturer’s service manual for
further instructions.
NOTE: On rare occasions, vehicles with a frame-mounted ABS
ECU have experienced a harness splice that is not robust.
Inspect the harness at the large T section for signs of leakage,
damage, chaffing, etc. Repair and replace the harness as
necessary.
NOTE: The BPP Sensor Fault may occur occasionally during
very light brake pedal applications with radar software versions
USO 1.0013 and USO 1.0014. It has been corrected in all later
radar sensor software revisions. Verify the software level in the
radar per the Radar Sensor and Display Software Levels
section. If the software version is USO 1.0013 or 1.0014,
replace the radar sensor per the Radar Sensor Replacement
procedure. If the procedures documented here do not correct
the BPP Sensor Fault, refer to the ABS stability system service
manual to service the BPP Sensor.
Figure 2.34
WABCO Maintenance Manual MM-0951 (Revised 08-18)
55
2 Diagnostics, Troubleshooting and Testing
Stop Lamp Relay Fault
Occasionally an ABS retarder relay fault may occur. The system
uses this ABS function to turn ON and OFF the stop lamps when
OnGuard is commanding the braking. If this ABS fault occurs,
perform the following procedure:
1. Use TOOLBOX™ to activate the stop lamp relay by using the
retarder relay command. The stop lamps should turn ON and
OFF. If the stop lamps operate, clear the ABS fault code. If OK,
the repair is completed. If it is not OK, proceed to step 2.
2. Inspect the stop lamp harness between the ABS ECU and the
stop lamp relay. Correct any harness issues.
3. Verify that the relay has power. The fuse that powers the relay
may need to be replaced.
4. Remove the relay from the socket. Using a multi-meter, verify
the relay coil resistance (Pin 85 to Pin 86) is about 85 ohms. If
the coil resistance is open, replace the relay.
5. Use TOOLBOX™ to activate the stop lamp relay by using the
retarder relay command. The stop lamps should turn ON and
OFF. If the stop lamps operate, clear the ABS fault code. If OK,
the repair is completed.
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WABCO Maintenance Manual MM-0951 (Revised 08-18)
3 Component Replacement
WARNING
WARNING
3 Component Replacement
Hazard Alert Messages
Read and observe all Warning and Caution hazard alert messages in
this publication. They provide information that can help prevent
serious personal injury, damage to components, or both.
To prevent serious eye injury, always wear safe eye protection
when you perform vehicle maintenance or service.
Release all air from the air systems before you remove any
components. Pressurized air can cause serious personal
injury. Refer to the vehicle manufacturer’s service manual for
instructions.
Radar Sensor
Park the vehicle on a level surface. Block the wheels to
prevent the vehicle from moving. Support the vehicle with
safety stands. Do not work under a vehicle supported only by
jacks. Jacks can slip and fall over. Serious personal injury and
damage to components can result.
Radar Sensor Assembly Ball Socket Clips and
Alignment Screws
Occasionally the radar sensor may become loosened from the
mounting hardware by an impact on the front of the sensor. This can
cause any or all three of the sensor alignment screws to disengage
from the corresponding ball socket clips. When this occurs, the
radar sensor can become misaligned or can operate erratically. The
impact may or may not damage the radar fascia, radar or any of the
radar mounting hardware depending on the severity of the impact.
To correctly inspect the integrity of the radar mounting hardware,
hold on to the radar and wiggle it back and forth. There should not
be any physical or visual movement or slack in the radar, ball socket
clips, screws, through-hole adjusters or rivets. Ensure there is at
least 1/4-inch (6.35 mm) of clearance between the fascia, radar
sensor and the bumper in all directions. Contact between the radar
sensor and bumper can cause damage to the through-hole
adjusters, ball socket clips and radar screws.
If the plastic ball socket clip has been damaged, remove the
damaged ball socket clip with a pair of pliers. Install a replacement
ball socket clip at the damaged location and re-seat the radar
sensor to the bracket assembly as described above.
Early vehicle installations used Torx T15 alignment screws to mount
the radar sensor to the bracket. Replacement alignment screws now
incorporate a larger stainless steel T20 Torx head with a deeper
socket, shorter screw length and self-cutting threads. When using
this new screw, be sure to use the correct T20 Torx bit to install the
replacement screw and adjust the radar sensor. It is possible to use
a T15 bit to install the T20 screw head, but it will frequently cause
damage to the T20 screw. Also, be careful to check each screw to
determine if it is a T15 or T20 screw and to confirm that the head is
not stripped.
Radar Sensor Replacement
1. Turn the ignition switch to the OFF position.
2. Place blocks under the rear tires to prevent the vehicle from
moving. Apply the parking brake.
3. Remove the two fascia mounting bolts and remove the fascia
from the radar sensor. Figure 3.1. Note the orientation of the
fascia. The fascia must be mounted with the indented “chin”
positioned facing the radar electrical connector location. If the
radar harness connector is on the top of the radar, the radar
fascia should be oriented so the wording “OnGuard™” is on
the top and is rightside up. If the radar harness connector is on
the bottom of the radar, the radar fascia should be oriented so
the wording “OnGuard™” is on the bottom and is rightside up.
If the fascia has a “chin” rather than the “OnGuard” wording,
the “chin” should be oriented over the radar connector, either
on the top or on the bottom respectively.
Figure3.1
RADAR
FASCIA
If the radar sensor has become loose and the plastic ball socket clip
is not damaged, place a tool between the back of the radar sensor
and the bracket near the dislocated ball screw socket. Gently pry the
radar sensor away from the bracket until the ball socket engages
with the alignment screw.
Figure 3.1
4007305a
WABCO Maintenance Manual MM-0951 (Revised 08-18)
57
3 Component Replacement
4007314a
RADAR BRACKET
THROUGH-HOLE ADJUSTERS
4. Disconnect the radar sensor connector by depressing the lock
tabs on both sides of the radar connector.
5. Remove the radar sensor from the radar sensor bracket by
removing the three alignment screws. Figure 3.2.
NOTE: The radar alignment screws may be a T15 or a T20 Torx
head. Using the incorrect size will result in damage and
difficulty in removing. If damage to the Torx head occurs,
replace with T20 Torx screws. Take care not to use excessive
torque on the screws, thereby stripping the heads.
Figure3.2
Figure 3.2
6. Verify that the mounting bracket bolts are securely tightened
and the mounting bracket is in good condition. If the bracket is
loose, repair or replace as necessary.
7. Inspect the three through-hole adjusters to make sure they are
in good condition. Repair or replace as necessary. They must
be riveted to the mounting bracket.
8. If replacement of any of the three alignment screws is needed,
follow these instructions for installation screws into the ball
socket clips.
A. Mount the radar sensor to the bracket. Walk the sensor
onto the bracket by rotating each screw about three
rotations each with multiple passes until the back of the
radar sensor is about 3/4 inch from the radar bracket and
is approximately parallel to the bracket. Wedge a small
wrench handle between the radar sensor and the bracket
near each ball screw socket. Gently pull on the wrench
until the alignment screw ball head pops into the ball
socket clip.
Figure3.3
ALIGNMENT AND MOUNTING SCREW
IN BALL SOCKET
4007315a
Figure 3.3
9. Turn the alignment screws in until the gap between the back of
the radar sensor and the mounting bracket is 1/4 to 3/8 inch.
This gap should be the same at each alignment screw location.
10. Verify that there is at least 1/4 inch gap between the radar
sensor and the bumper. If there is not a 1/4 inch gap, turn the
alignment screws in further or adjust the bumper to create this
gap. This gap is critical to the correct operation of the
OnGuard Collision Safety System.
11. Reconnect the sensor connector by pushing on the connector
until it snaps into the radar sensor. Slide the rubber boot over
the connector until the connector is completely covered by the
boot. If required, snap the cable clip into the hole at the corner
of the bracket and make sure the harness does not rub against
any sharp edges.
12. Perform the Radar Sensor Alignment procedure in Section 2.
13. Replace the fascia using the bolts removed during sensor
removal. Figure 3.4. The fascia must be mounted with the
indented “chin” positioned facing the radar electrical connector
location. If the radar harness connector is on the top of the
radar, the radar fascia should be oriented so the wording
“OnGuard™” is on the top and is rightside up. If the radar
harness connector is on the bottom of the radar, the radar
fascia should be oriented so the wording “OnGuard™” is on
the bottom and is rightside up. If the fascia has a “chin” rather
than the “OnGuard” wording, the “chin” should be oriented
over the radar connector, either on the top or on the bottom
respectively.
B. Make sure all three ball socket clips and alignment
screws are seated correctly. No motion should occur
between the bracket and the radar sensor if the screw is
correctly seated in the ball socket. Figure 3.3.
58
WABCO Maintenance Manual MM-0951 (Revised 08-18)
WARNING
Figure3.4
RADAR
FASCIA
4007305a
Figure 3.4
Display Replacement
Park the vehicle on a level surface. Block the wheels to
prevent the vehicle from moving. Support the vehicle with
safety stands. Do not work under a vehicle supported only by
jacks. Jacks can slip and fall over. Serious personal injury and
damage to components can result.
3 Component Replacement
1. There are two methods in which the OnGuard Display can be
installed.
A. Mounting screws through the instrument panel
B. Velcro tape holding the OnGuard Display to the instrument
panel
2. If the OnGuard Display is mounted using mounting screws, the
instrument panel needs to be removed in order to unscrew
them from the back of the panel. Follow the vehicle
manufacturer’s recommendation for removal of the instrument
panel. Figure 1.4.
3. If the OnGuard Display is attached with Velcro, the instrument
panel does not need to be removed. Loosen the display from
the panel.
4. Make sure the ignition is in the OFF position. Disconnect the
wiring connector from the OnGuard Display.
5. Remove the OnGuard Display.
6. Connect the wiring connector to the new OnGuard Display.
7. Reinstall the new OnGuard Display using one of the two
attachment methods.
WABCO Maintenance Manual MM-0951 (Revised 08-18)
59
4 Appendix
CAUTION
4009031a
The radar harness
end will plug into
the “A” position
of the J1939
extension harness.
4 Appendix
Product Information Letter #504
OnGuard™ Radar Harness Re-Routing on
Freightliner P2 Century Chassis (Built in 2007 and
2008)
If the radar harness is worn or radar is not functioning, please use
the following routing instructions for new radar harness
(P/N: 400 850 801 0). For additional OnGuard™ service
information, contact WABCO North America Customer Care at
855-228-3203.
The following steps provide information for properly re-routing the
radar harness with P/N: 400 850 801 0.
1. Plug the harness into the radar sensor.
2. Route the harness around the right side of the sensor and up
through the hole in the frame above it.
3. Once the harness is through the hole in the frame, continue to
run the datalink portion of the harness towards the driver’s side
along the crossmember, fastening it with cable ties along the
way.
Figure4.1
Figure 4.1
Figure4.2
The radar harness
end will plug into
the “A” position
of the J1939
extension harness.
Do not over tighten the cable ties as this will damage the
wires.
Do not route the harness underneath or around the radiator as
this will cause damage to the harness as well.
4. The radar harness end will plug into the “A” position of the
J1939 extension harness. Figure 4.1 and Figure 4.2. The other
end of the harness (radar power) will follow the crossmember
towards the passenger side and will plug into the short radar
power jumper harness coming from the center bulkhead
connector.
4009032a
Figure 4.2
60
WABCO Maintenance Manual MM-0951 (Revised 08-18)
© 2018 WABCO North America – All rights reserved – MM-0951 / 08.2018
connects trucks, trailers, cargo,
drivers, business partners and
fl eet operators through advanced
fl eet management systems and
mobile solutions. WABCO reported sales of $2.8 billion in
2016. Headquartered in Brussels,
Belgium, WABCO has 13,000 employees in 40 countries. For more
information, visit:
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leading global supplier of technologies and services that improve
the safety, effi ciency and con-
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Founded nearly 150 years ago,
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