
OBD II 283
DIAGNOSTIC TROUBLE CODES (DTCs)
Press 2 to select <DTCs> from the <OBD II FUNCTIONS> menu. Diagnostic Trouble
Codes are also referred to as OBD II Mode 3. The Tester reads all DTCs which have been
saved by the vehicle's controllers and then displays the following:
• A list of the current DTCs and their descriptors.
• The ID of the ECU reporting them.
• Total number of codes being reported.
If the vehicle contains more than one OBD II ECU, select the primary ECU for the display
of diagnostic information. Refer to Section 5.0 Displaying Data For Multiple ECUs on
page 299, for more information.
A “↓” in the upper right of the display indicates that there are more DTCs than can be
displayed at one time. Use the u and d keys to scroll through the list of received
Trouble Codes.
A “*” next to the Trouble Code ID indicates there is freeze frame data associated with that
DTC. If freeze frame data is available for the highlighted DTC, press e to display
the <FREEZE DATA>. This is the same function as selecting <FREEZE DATA> from the
<OBD II FUNCTIONS> menu.
ACTIVE KEYS
u d Move the highlight up or down.
Scroll through all Trouble Codes.
e Display Freeze Data.
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