Sierra 1500 4WD V8-5.3L VIN B (2005)
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Refer to the table as a guide in selecting the correct test adapter for frontprobing connectors:
Backprobe
IMPORTANT:
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Backprobe connector terminals only when specifically required in diagnostic procedures.
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Do not backprobe a sealed (Weather Pack(R)) connector, less than a 280 series Metri-Pack connector, a Micro-Pack connector, or a flat wire
(dock and lock) connector.
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Backprobing can be a source of damage to connector terminals. Use care in order to avoid deforming the terminal, either by forcing the test probe
too far into the cavity or by using too large of a test probe.
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After backprobing any connector, inspect for terminal damage. If terminal damage is suspected, test for proper terminal contact.
Do not disconnect the connector and probe the terminals from the harness side (back) of the connector.
Scan Tool Snapshot Procedure
SCAN TOOL SNAPSHOT PROCEDURE
TOOLS REQUIRED
J 42598 Vehicle Data Recorder
SCAN TOOL SNAPSHOT PROCEDURE
Snapshot is a recording of the parameters of a control module while the snapshot is being made. A snapshot may be used to analyze the data during the
time a vehicle condition is current. This allows you to concentrate on making the condition recur, rather than trying to view all the data in anticipation
of the fault. The snapshot contains information around a trigger point that you have determined.
There are many different scan tools that have varying functions. For example, the Tech 2 Scan Tool can also graph parameters separately or in
combinations of parameters for comparison. Only a single data list may be recorded in each snapshot. It can trigger a Snapshot manually at the time
the symptom is noticed, or be set up in advance to trigger when a DTC sets. The Tech 2 Scan Tool has the ability to store 2 snapshots. The ability to
record 2 snapshots allows comparing hot versus cold and good versus bad vehicle scenarios. The snapshots are stored on a first-in, first-out basis. If a
third snapshot is taken, the first snapshot stored in the memory will be lost.
Snapshots can be 1 of 2 types:
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Snapshot-taken from the Snapshot menu choice
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Quick Snapshot-taken from the Data Display soft key choice, does not contain DTC information
When a snapshot is taken, it is recorded on the memory card and may contain as many as 1,200 frames of information. Because the snapshot is
recorded onto the memory card, snapshots are not lost if the Tech 2 Scan Tool is powered down.
The snapshot replay screen has a plot soft key that can be of great value for intermittent diagnosis. The snapshot plot feature can help you to quickly
determine if a sensor is outside of its expected values by plotting 3 parameters at a time. The data will be displayed both graphically and numerically