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Using the Diagnostic Tool
CODE RETRIEVAL PROCEDURE
38 Craftsman 87702
In OBD2 systems, when an
emissions-related engine malfunction
occurs that causes a DTC to set, a
record or snapshot of engine
conditions at the time that the
malfunction occurred is also saved in
the vehicle’s computer memory. The
record saved is called Freeze Frame
data. Saved engine conditions include, but are not limited to: engine
speed, open or closed loop operation, fuel system commands,
coolant temperature, calculated load value, fuel pressure, vehicle
speed, air flow rate, and intake manifold pressure.
If more than one malfunction is present that causes more
than one DTC to be set, only the code with the highest
priority will contain Freeze Frame data. The code
designated “01” on the Diagnostic Tool display is referred
to as the PRIORITY code, and Freeze Frame data always
refers to this code. The priority code is also the one that
has commanded the MIL on.
Retrieved information can be uploaded to a Personal
Computer (PC) with the use of optional software (see
instructions included with the software for more information).
10. When the last retrieved DTC has been displayed and the DTC
button is pressed, the display returns to the first DTC retrieved.
11. Determine engine system(s) condition by viewing the Diagnostic
Tool’s LCD display for any retrieved Diagnostic Trouble Codes,
code definitions, Freeze Frame data and interpreting the green,
yellow and red LEDs.
If DTC’s were retrieved and you are going to perform the repairs
yourself, proceed by consulting the Vehicle’s Service Repair
Manual for testing instructions, testing procedures, and flow
charts related to retrieved code(s).
If you plan to take the vehicle to a professional to have it
serviced, complete the PRELIMINARY VEHICLE DIAGNOSTIC
WORKSHEET on page 28 and take it together with the retrieved
codes, freeze frame data and LED information to aid in the
troubleshooting procedure.
To prolong battery life, the Diagnostic Tool automatically shuts
“Off” approximately three minutes after it is disconnected from
the vehicle. The DTCs retrieved, Monitor Status and Freeze
Frame data (if any) will remain in the Diagnostic Tool’s memory,
and may be viewed at any time by turning the unit “On”. If the
Diagnostic Tool’s batteries are removed, or if the Diagnostic
Tool is re-linked to a vehicle to retrieve codes/data, any prior
codes/data in its memory are automatically cleared.
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