Snap-On APOLLO D8, User Manual

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Scanner Codes - View / Save
20
Display Codes
This function opens either a list of diagnostic trouble codes (DTCs) stored in the
selected vehicle electronic control module (ECM), or a submenu of DTC viewing
options. The code list includes the DTC and a brief description (
Figure 5-6
).
If Intelligent Diagnostics information (optional) is active and data is available for a
selected DTC, the Diagnose icon (
Figure 5-6
arrow).is selectable. For additional
information about using Intelligent Diagnostics, see
Intelligent Diagnostics on
page 45
.
Figure 5-6
DTC results and Diagnose icon
Submenu options may include:
•
Trouble Code Information —opens a list of codes in ECM memory
•
History Codes —opens a list of codes whose symptoms are not currently
present. History codes indicate an intermittently occurring problem.
•
Failed This Ignition —opens a list of codes that set during the current ignition
cycle.
•
MIL SVS or Message Requested —displays ECM requests to turn on the
malfunction indicator lamp (MIL) or service vehicle soon (SVS) lamp, or display
a driver information alert.
•
Last Test Failed —displays a complete list of failed tests.
•
Test Failed Since Code Cleared —displays a list of tests that failed since the
last time codes were cleared from ECM memory.
Clear Codes
The diagnostic tool clears codes from the vehicle electronic control module memory
on most vehicles. If this function is not available on the test vehicle, Clear Codes
does not appear as a menu option.
z
To clear codes:
1. Select Clear Codes from the Codes Menu.
A confirmation message displays.
2. Make sure any conditions shown on the confirmation message are met, then
select
Yes .
A “codes cleared” message displays once the operation is complete.
3. Select Continue to return to the Codes Menu.
IMPORTANT
Clearing codes erases all temporary ECM information, including Freeze
Frame/Failure Records. Make sure no vital diagnostic information will be
lost before clearing codes.
Freeze Frame/Failure Records
This selection displays the DTC that was set, along with corresponding data, when
the ECM commanded the malfunction indicator lamp (MIL) to turn on.
5.3.2 Code Scan (with Vehicle System Report)
Code Scan is available from the Vehicle System menu, and when selected it scans
the vehicle control modules for codes. For detailed information see
Vehicle Code
Scan on page 40
.