Scan Tool User Guide 37
Review Codes
6: Diagnostic Trouble Codes
Review Codes
The Review Codes function lets you view DTCs read
from the selected ECU. This function displays DTCs
only after you have used a function that reads codes,
such as Read Codes, KOEO Self-Test, Self-Diag-
nostics, Output State Test, and Wiggle Test. Use
these steps to review trouble codes after initially
reading them.
To review DTCs, follow these steps:
Figure 6.28: Diagnostic Menu Screen and Diagnostic Trouble
Codes Screen
1 With the Diagnostic Menu screen displayed, select
Diagnostic Codes and press the ENTER key. This
displays the Diagnostic Trouble Codes menu screen
(shown above).
2 Select Review Codes and press the ENTER key.
Figure 6.29: Review Codes Select Screen
3 If the Review Codes Select screen appears, select
one of the following options, and then press the
ENTER key to display the codes. (Otherwise, skip this
step.)
• KOEO on Demand — displays DTCs detected
at the time of a KOEO test (also called hard
fault codes).
• KOEO Keep Alive — displays DTCs stored in
the ECU before a KOEO test (also called
current codes).
• KOER — displays codes from a KOER test.
NOTE: If there are no codes to display, a message
screen states that the code library is empty. Press
the OK function key to continue.
Figure 6.30: Review Codes Screen
4 View the list and optionally print it.
5 Use the EXIT key to return to previous screens.
NOTE: After reviewing the codes, if necessary, clear the
codes. Refer to Clear Codes
on page 38. If necessary,
consult the manufacturer’s service manual for the correct
“clear code” method.
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