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General Motors Tech2 User Guide
115
• Below the first line is the number and name of the DTC.
• Diagnostic test status tells whether the test ran and whether it passed or failed.
• DTC status lists the DTC information. This is the status of the tests that were run
and the related DTC messages that can be viewed by the technician. This
information is based only on the DTC information listed, since some DTC
information will not be available on all applications.
2. If more than one DTC is set for a frame, scroll bars will appear at the right side of the
DTC window. To view other DTCs click-and-drag the scroll box or use the scroll
arrows.
3.
To determine exactly when a DTC set during a snapshot, use the “Play Forward” and
“Play in Reverse” selections to play the snapshot with the DTC window still in view.
DTC information will continue to display for all the frames during which the DTC was
set.
• This information can be useful for diagnosing DTCs by displaying related data
parameters at the point in time when the code was set.
T I P
The View DTC Information icon will be highlighted if a code was set during a
snapshot. Select the View DTC Information icon. This will show any and all DTCs set
during the snapshot, since DTCs are stored for the duration of the snapshot
4. When a frame is reached for which a diagnostic trouble code does not exist, the DTC
window will display a blank.
T I P
In most snapshots, DTCs set near the trigger frame. To quickly locate the frame
where a DTC occurred, click on the “Trigger Frame” selection. Then use the “Forward One
Frame” or “Reverse One Frame” selections to view the frames just before and after the
trigger frame. Chances are the DTC will appear within these frames. If not, continue
viewing the snapshot using the “Play Forward” or “Play in Reverse” selections.
Diagnostic Trouble Code Change Mode
This feature allows the user to move from trouble code to trouble code within the snapshot.
If you select the View DTC Information icon, when in a snapshot the Snapshot application
will display a split screen. This screen will consist of the DTC information on the upper half
of the screen and the parameter data display on the lower half of the screen.
If the DTC was not set in the selected frame of the snapshot, the DTC information will not
display until the snapshot is advanced to the first frame in which the DTC was set. Select
the Diagnostic Trouble Code Change icon to advance to the first frame of the DTC. In DTC
change mode, selecting the forward or reverse arrows will move the application to only the
frames in which a DTC was set.
Displaying Graphs
Graph display modes give you the ability to view snapshot parameters in graph form. This
allows you to see how a parameter functions over time. It also allows easy visual
comparison of up to six parameters at a single time. The two graph display modes are
three-graph and six-graph.
Summary of Contents for Tech2
Page 1: ...General Motors Tech2 User Guide 1 GM Tech2 User Guide ...
Page 20: ...General Motors Tech2 User Guide 20 Connection of the power jack to the DLC cable ...
Page 22: ...General Motors Tech2 User Guide 22 ...
Page 24: ...General Motors Tech2 User Guide 24 PCMCIA card keying ...
Page 26: ...General Motors Tech2 User Guide 26 VCI module removal ...
Page 32: ...General Motors Tech2 User Guide 32 Attaching the Tech2 to non OBD II equipped vehicles ...
Page 40: ...General Motors Tech2 User Guide 40 RS 232 cable connections ...
Page 46: ...General Motors Tech2 User Guide 46 Tech2 startup screen ...
Page 47: ...General Motors Tech2 User Guide 47 Tools Options selected on Main Menu ...
Page 52: ...General Motors Tech2 User Guide 52 Test Status ...
Page 53: ...General Motors Tech2 User Guide 53 Test Pass ...
Page 64: ...General Motors Tech2 User Guide 64 Selectable VCI test selected on Tech2 Self Test main menu ...
Page 65: ...General Motors Tech2 User Guide 65 First selectable VCI Self Test screen ...
Page 78: ...General Motors Tech2 User Guide 78 CANdi Diagnostics selected on Tool Options menu ...
Page 86: ...General Motors Tech2 User Guide 86 System Selection Menu ...
Page 97: ...General Motors Tech2 User Guide 97 Tool Controls Menu ...
Page 98: ...General Motors Tech2 User Guide 98 Hardware Menu ...
Page 101: ...General Motors Tech2 User Guide 101 Accept soft key on data screen ...
Page 103: ...General Motors Tech2 User Guide 103 Live Plot Screen with selectable items ...
Page 104: ...General Motors Tech2 User Guide 104 Min Max Adjustment screen ...
Page 106: ...General Motors Tech2 User Guide 106 Live Plot Resume soft key ...
Page 107: ...General Motors Tech2 User Guide 107 Live Plot Data List soft key ...
Page 136: ...General Motors Tech2 User Guide 136 Programming Failed Screen ...
Page 141: ...General Motors Tech2 User Guide 141 Controller Area Network diagnostic interface CANdi module ...