Bendix Commercial Vehicle Systems ACom Diagnostics V.5.9 - Manual (Page 8)

8
Diagnostic Trouble Code Screen
The diagnostic trouble code window has three main
parts: active diagnostic trouble codes, inactive or
memorized diagnostic trouble codes, and event history.
One or more of these tabs may not appear in the
window, because they are ABS ECU dependent. All
active diagnostic trouble codes (DTC’s) are displayed
“real” time, which means the ABS ECU is reporting a
currently active DTC. Inactive/Memorized diagnostic
trouble codes are DTCs, which were active in the past.
Event history entries are chronological listing of DTCs
and other events, maintained by the ABS ECU.
Figure 10
Diagnostic Trouble Code Window Tabs
Active diagnostic trouble code tab will be displayed for
all ABS ECU’s, while the inactive diagnostic trouble
code will only be displayed with U12, U16, ABS 2X,
A18, and TABS-6 ABS ECUs. The event tab will be
displayed for EC-17, EC-30
™ , EC-30 ™ T, EC-60 ™
controller and TABS-6. The Advanced EC-60 ™ ECU
has an additional tab, ESP Counter.
Diagnostic Trouble Code Specifi c Information
Active diagnostic trouble code information consists of
descriptions, occurrence counts, sub-system identifi ers
(SID), and failure mode identifi ers (FMI). Reference
service data sheets for more information. If the ABS
ECU does not support occurrence count information,
N/A will be displayed. Additionally, each tab will display
the current odometer (trailer) / engine hours (tractor)
depending on the ABS ECU and what it supports.
Figure 11
Troubleshooting Information
The embedded bitmap and test information will show
the connectors with highlighted terminal locations to
assist in troubleshooting. Highlighting the selected
diagnostic trouble code will provide Service Data Sheet
information, on how to fi x the diagnostic trouble code in
the panel below the active DTC description.
Figure 12
Diagnostic Trouble Code Events
Diagnostic trouble code events are stored in this
section. These events are stored in chronological
order, with the newest event displayed fi rst in the
list. The Description column is the text indicating
the particular diagnostic trouble code event. The
Occurrence Counts column displays how many times
a DTC has happened. If the DTC occurs consecutively
there will be an entry of the original DTC and the last
DTC. The last DTC will indicate how many times the
DTC has occurred since the fi rst, but not including the
fi rst occurrence. The Power Up Time column is a time
stamp indicating when the DTC occurred after power
up. There are 4 possible time stamps: 0 to 10 seconds,
10 seconds to 15 minutes, 15 minutes to 1 hour, and
greater than 1 hour. The Vehicle Velocity is the vehicle
speed at which the diagnostic trouble code occurred.
The B is the mileage at which the diagnostic trouble
code occurred. The Time Stamp is a record of when
the event occurred in terms of either power cycles or
engine hours. The power cycle time stamp is recorded
when engine hours is unavailable and identifi es how
many power cycles ago the event occurred. The power
cycle time stamp stops counting when the value of 255
has been reached.