Perkins 1106D Troubleshooting Manual page 29

SENR9982
The ECM can store a maximum of two snapshots that
are triggered by a diagnostic code. Two snapshots
can be triggered manually. The snapshots are stored
in a circular buffer. The newest snapshot will replace
the oldest snapshot.
The ECM stores the snapshots in memory. Snapshots
are maintained in the ECM until the snapshots
are cleared. The following conditions will clear a
snapshot:
•
Operator request via the electronic service tool
•
The snapshot has been stored for 100 hours of
engine operation.
Snapshot That is Triggered by a
Diagnostic Code
When certain diagnostic codes occur, the ECM
records many of the status parameters that are
available on the electronic service tool. The ECM
records this information for approximately nine
seconds before the code occurs and approximately
four seconds after the code occurs.
Snapshot That is Triggered by the
Operator
A snapshot can be triggered by the operator by using
the electronic service tool.
On the electronic service tool, the snapshot can
be triggered from the "Snapshot Recorder Tool".
Refer to the instructions on the screen or refer to the
documentation for help on the system.
The "Raise/Resume" switch for the Power Take Off
(PTO) may be able to generate a snapshot, if the
option is installed.
If a snapshot can be generated by use of the
"Raise/Resume" switch for the PTO, perform the
following procedure to trigger a snapshot:
Illustration 13
Typical "Raise/Resume" Switch for the PTO
(1) OFF position
(2) RAISE position
(3) RESUME position
1. Toggle the switch quickly from the OFF position
(1) to the RAISE position (2).
2. Toggle the switch quickly from the RAISE position
(2) to the RESUME position (3).
3. Toggle the switch quickly from the RESUME
position (3) back to the OFF position (1).
Note: All three steps must occur within a one second
time period in order to take a snapshot. Performing
the steps in the reverse order also triggers a
snapshot.
Use of Snapshot Data
Use snapshot data only to help determine engine
operating conditions when an intermittent problem
occurs. If an intermittent diagnostic code is causing
problems, use the snapshot data. Snapshot data can
be used to determine whether the problem occurs
under specific circumstances. The following list
contains examples of specific circumstances:
•
Engine rpm
•
Range of coolant temperatures
Use the snapshot data in order to determine the
operating conditions that were present during the
event. Attempt to duplicate the conditions in order
to get the code to recur.
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Troubleshooting Section
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