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Triggering Snapshots
Description:
The Engine ECM saves certain information for use in
troubleshooting any time a fault code is logged. There
is also a method to manually trigger snapshots using
the Set/Resume cruise control switch. By toggling the
switch from the “center-off” position, up to the Set
position and down to the Resume position and back
to the “center-off” position (or vice-versa) within a
one second time period, a snapshot of the engine
parameters will be taken. Only the 4 most recent
manually triggered snapshots can be stored at anytime.
Set
Resume
Available:
All electronically controlled on-highway engines
covered in this handbook
Advantages:
The driver who is experiencing an intermittent problem
can aid in the troubleshooting of the problem by taking a
“snapshot” when experiencing the problem. A snapshot
records 13 seconds of engine data, 9 seconds before
the trigger and 4 seconds after the trigger. This snapshot
information can then be viewed by a technician using a
service tool.
Disadvantages:
None
Miscellaneous Information