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ABS / Air Bag 2004 User Guide Chapter 5: Diagnostic Codes (Read / Clear Codes)
5: Diagnostic Codes (Read / Clear Codes)
The Diagnostics Codes (or Read Codes and Clear
Codes) functions let you read, review, and clear
diagnostic trouble codes (DTCs) for a vehicle.
The diagnostic trouble code option(s) that appear on
the Diagnostic Menu screen vary depending on the
vehicle being tested. For some vehicles, the menu
option is Diagnostic Codes (see Figure 5.1
); for other
vehicles, there are two menu options: Read Codes and
Clear Codes (see Figure 5.2
).
The Diagnostic Codes option appears on the Diag-
nostic Menu screen for vehicles that allow reading of
DTCs with a scan tool. This chapter includes the fol-
lowing procedures for using the Diagnostic Codes
functions:
•
“Read Codes” on page 34
• “Review Codes” on page 37
• “Clear Codes” on page 38
• “Self Diagnostics” on page 39
• “Wiggle Test” on page 41
The Read Codes and Clear Codes options appear on
the Diagnostic Menu screen (instead of the Diagnostic
Codes option) for vehicles that require reading of DTCs
by visually viewing them as “flash codes.” For this type
of vehicle, you identify the vehicle’s “flash code” num-
bers and manually enter the numbers into the NGIS tool
to see their descriptions. This chapter includes the fol-
lowing procedures for using the Read Codes and Clear
Codes options when they appear directly on the Diag-
nostic Menu screen:
•
“Read Codes (Flash Codes)” on page 42
• “Clear Codes (Flash Codes)” on page 44
Note: Before performing the procedures in this chapter, fol-
low the instructions in “Chapter 2:
Start-up Steps” on
page 13
.
Note: The ABS Air Bag 2004 software has an automatic
Diagnostic Code Triggered Record function. For vehicles with
datastream access, if a diagnostic fault occurs while you are
testing a vehicle, the software automatically alerts you with a
screen message and creates a recording for playback. To
replay these recordings, refer to “Playback a Data File
” on
page 21
.
Figure 5.1: Diagnostic Menu Screen with Diagnostic Codes Option
Figure 5.2: Diagnostic Menu Screen with Read Codes and Clear Codes
Options