3 Diagnostics, Troubleshooting and Testing
17
WABCO Maintenance Manual MM-0112 (Revised 07-18)
Double-clicking on the fault, or clicking on Details, will provide
troubleshooting and detailed repair instructions. TOOLBOX™
Software version 11 also provides links to the appropriate
system schematic which are also provided in this maintenance
manual.
NOTE: If you are using TOOLBOX™ Software version 11,
Internet Explorer is required to load files containing repair
information, maintenance manual and schematics.
Faults that may occur after the screen is displayed will not
appear until screen is manually updated. Use the Update
button to refresh the fault information table.
After making the necessary repairs, use the clear faults
button to clear the fault. Use the Update button to refresh the
fault information table and display the new list of faults. Some
faults may require vehicle ignition to be cycled and vehicle
speed over 4 mph (6.4 kph) to clear them.
Use the Save or Print button to save or print the fault
information data.
NOTE: If the TOOLBOX™ Software is unable to communicate
with the ECU, verify the system is self-testing when the key is
cycled.
If the system is not self-testing: Check all the powers and
grounds connecting to the ECU including load testing.
If the system is self-testing: Check the following.
앫 Verify the ECU part number.
앫 Verify device and data link connections are secure.
앫 Verify the device is RP1210A compliant and that the
comport settings (Vendor, Protocol, Adapter) in
TOOLBOX™ Software are correct.
앫 Verify the device software and firmware is up-to-date.
Blink Code Diagnostics (ABS Only)
Definitions
Blink codes can be used to obtain fault information for ABS
components, however, due to the advanced level of complexity of
ESC, RSC and HSA, it is recommended to use WABCO TOOLBOX™
Software for detailed troubleshooting of any of these systems.
Before using blink code diagnostics, you should be familiar with a
few basic terms. If you used previous versions of WABCO’s blink
code diagnostics, review these definitions to identify major changes.
ABS Indicator Lamp: This lamp serves two purposes: it alerts
drivers to an ABS tractor fault and it is used during diagnostics to
display the blink code.
Blink Code: A series of blinks or flashes that describe a particular
ABS fault or condition. Codes are displayed in two-digit blink codes.
Blink Code Cycle: Two sets of flashes with each set separated by a
one-and-one-half second pause. Blink codes are defined in the blink
code identification information in this section.
Blink Code Switch: A momentary switch that activates blink code
diagnostic capabilities. Switch types and locations vary, depending
on the make and model of the vehicle.
Clear: The process of erasing faults from the ECU.
Diagnostics: The process of using blink codes to determine ABS
faults.
Fault: An ABS malfunction detected and stored in memory by the
WABCO ECU. System faults may be Active or Stored.
Active Fault: A condition that currently exists in the ABS; for
example: A sensor circuit malfunctions on the left front steering
axle. An active fault must be repaired before it can be cleared from
memory — and before you can display additional blink code faults.
Stored Fault: There are two types of stored faults:
A. A repaired active fault that has not been cleared from the
ECU.
B. A fault that occurred but no longer exists. For example, a
loose wire that makes intermittent contact. Because stored
faults are not currently active, they do not have to be repaired
before they can be cleared from memory.
WABCO recommends you keep a record of these faults for future
reference.
System Configuration Code: One-digit code displayed during the
clear mode. Blink codes for common ABS configurations are shown
in Figure 3.11.
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