Subsection 01 (DIAGNOSTIC AND FAULT CODES)
FAULT CODES
Fault Code Categories
A fault code consists of an alphanumeric designa-
tor followed by a hexadecimal number of 3 digits.
The alphanumeric designator defines the category
of the fault code while the hexadecimal number
refers to a unique fault.
FAULT CODE CATEGORIES
ALPHANUMERIC
DESIGNATOR
MODULE/
SYSTEM
EXAMPLE
OF FAULT
CODE
From P0 to P3
Power train, TCM
and DPS
P0116
From U0 to U3
Communication
between module
and sensors
U0073
RELATED MODULE AND FAULTS
MODULE
FAULT CODE
CATEGORY
ECM
P and U
DPS
P and U
Cluster
P and U
Fault Code States
Fault codes have 3 possible states:
– Active
– Occurred
– Inactive.
Click the
Fault
tab then click on the drop-down list
on the LH lower corner.
Choose the fault code state you want to display.
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TYPICAL
1. Drop down list
Active Fault Codes
An active fault code is an indication of a fault that
is
currently triggered
.
The active fault may or may not compromise
normal operation of the system(s). Service ac-
tion should be taken to correct the problem that
caused the fault code.
Once the fault condition(s) of the active fault is no
longer present, its state will change to "occurred".
Occurred Fault Codes
An occurred fault code indicates a fault that was
active, but
no longer
is.
The occurred fault does not presently affect sys-
tem or component operation but is retained as a
history of the faults that were detected.
The fault may have been generated due to a
system or component that was momentarily op-
erating outside normal parameters. Repeated
occurred faults of this type should be considered
when troubleshooting a problem, and may require
that maintenance action be taken.
An occurred fault may also be generated when
disconnecting and reconnecting a component, re-
placing a burnt fuse, when the software update of
an electronic module has been carried out, or may
be due to a momentary high or low voltage.
Inactive Fault Codes
An inactive fault code represents a fault code that
is neither active, nor occurred. It is simply part of
a list of all possible faults that can be monitored
by the ECM and multifunction gauge, which may
become active or occurred if the monitoring sys-
tem detects an applicable fault. These codes can
be viewed in B.U.D.S.
How to Display Fault Codes in the
Multifunction Gauge
NOTE:
A fault code must be in an "Active" state to
be displayed in the multifunction gauge. B.U.D.S.
must be used to read all fault codes states.
1. Use the selector button or mode button and
scroll to Engine Hour (EH) on the gauge.
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1. Selector button
2
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