2
Diagnostics, Troubleshooting and Testing
5
WABCO
Maintenance Manual MM-1306 (Revised 08-18)
2 Diagnostics, Troubleshooting and Testing
General Information
Radar Sensor and Display Software Levels
Many diagnostic and troubleshooting procedures will require
knowledge of the software version of the radar sensor and display.
NOTE:
The radar sensor software version is determined using
TOOLBOX™ Software.
The display software revision level is determined using the following
display operating procedure.
1.
Turn the ignition key ON and wait for the display to power up.
2.
Press the “Mode” key on the display several times until the
screen labeled “Software Rev” shown in Figure 2.1 appears.
Figure 2.1
NOTE:
Take note of the software version of each component for
reference during maintenance procedures and repairs.
Error Screens and Diagnostic Trouble Codes
If the system is not operating correctly, an error screen or a screen
containing Diagnostic Trouble Codes (DTCs) may be shown on the
display. Only currently
active DTCs
are displayed.
NOTE:
It is important to document any DTC that is displayed
because stored DTCs are not displayed and are only retrievable with
TOOLBOX™ Software.
NOTE:
When active DTCs are present, the system may be partially
or fully disabled depending on whether the DTC(s) is associated with
the ACC functions or the CMS functions.
Multiple DTCs may be active simultaneously. If a DTC is shown on
the display, use the UP and DOWN keys on the display to scroll
through each code. Figure 2.2. Record each DTC for future
reference.
Figure 2.2
CMS DTCs may become active during service procedures on other
electrical system components (e.g., engine, transmission, ABS,
etc.). If there are other vehicle systems with faults, they should be
repaired first. After completion of service on the other vehicle
system components, cycle the ignition OFF for at least two minutes
and then turn the ignition back ON. Start the engine and run it at idle
speed for at least two minutes. This frequently clears the CMS
DTCs.
Required Maintenance
A service alignment is required after completion of any adjustments,
repairs, replacement or maintenance affecting tires, chassis, or
front body components. For information about service alignment,
refer to the Radar Sensor Service Alignment Procedure in this
section.
NOTE:
Failure to complete the required service alignment may
result in driveability concerns. The system performance may be
affected.
The following, although not all-inclusive, is a list of service,
maintenance, and repair operations requiring CMS service
alignment:
앫
Chassis parts replacement
앫
Steering or suspension parts replacement, adjustment, or
alignment
앫
Tire inflation or size change, and/or tire replacement
앫
Front body parts replacement or adjustment
Figure 2.1
401038
9a
SOF0862XX
Display
SOFTWARE REV
Figure 2.2
4010554
b
DISPLAY UP/DOWN KEYS
