User Manual

Getting Started • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •
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1
Menus
The menus on the tool display are referenced in the procedures and are
highlighted in bold-italic text.
Example:
Press the (17(5 key to return to theGM Function List.
Questions and Responses
Messages and user responses are CAPITALIZED.
Example:
Selecting NO displays a COMMAND CANCELLED message prompting you to
press
(17(5 to continue back to the OBDII Function List.
Manual References
Used to reference other sections of the manual. References include the “Title”
and page number (section-page).
Example:
Complete the following list using the function “Tool Information” on page 2-5.
Screens
The screens are presented as examples and may change as the software is
updated.
Example:
ON-BOARD DIAGNOSTICS
The original on-board diagnostics (OBD I) lacked consistency in communication
and interface while allowing different interpretations amongst vehicle
manufacturers. Ford used several types of engine control computers, Chrysler
used several types of data link connectors and GM varied the trouble codes and
communication protocols from year-to-year.
The following tables highlight changes for GM, Ford, and Chrysler. If this seems
confusing; don’t worry. Your tool makes it easy. Based on the VIN information
selected during Scan Tool setup, the processor is automatically recognized. All
you have to do is choose the correct adapter cable and jumper wires (if
necessary). Details on adapter cables and jumper wires may be found in
“Diagnostic Link Connectors (DLC)” on page 1-4.
GM On-Board Diagnostics
System Years Description
OBD I Control Module 1981–1995
Most vehicles used the 12-pin ALDL (Assembly Line Data Link)
located under the dash on the driver side. Some 94-95 vehicles
used the 16-pin OBD II (J1962) data link connector (DLC), but
use the Historical application software. Refer to the vehicle’s
Vehicle Emission Control Information label.
OBD II Control Module 1994*-Present Complies with OBD II regulations and uses the J1962 DLC.
* OBD II system used in certain 1994-1995 vehicles equipped with a 2.2L, 2.3L, 3.8L, 4.3L or 5.7L engines.
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