<No> ~

GM Enhanced (OBD II) Diagnostics

GM arranges the PIDs in four groups:

❒Analog: viewing of analog sensor signals, such as measured voltage from O2 sensors, temperature sensors, and air flow sensors.

Select Pid Group

?

` Analog

 

O2

[

Misfire

~

❒O2: viewing oxygen sensor information.

❒Misfire: viewing of cylinder misfire information.

❒Digital: viewing of switches, solenoids and relays.

✓Some GM trucks manufactured in 1996 – 1998 have only one PID group. For these vehicles, the selection menu does not appear.

After selecting a group, the scan tool

asks the vehicle to provide the PIDs it Validating PID Map supports for that group.

The scan tool displays a menu with display options. Use the UP/DOWN to select an option and press ENTER. Refer to “Viewing Data” on page 3-11 to setup the data list.

5

PID 23 of 99

Please Wait

Select Data To View

`Entire Data List Custom Data List View Data Setup ~

After making a selection, press ENTER to establish a communication link. Multiple PIDs may be sent if the vehicle is equipped with more than one computer module — Powertrain Control Module (PCM), Transmission Control Module (TCM), etc. The scan tool identifies them by their identification names (ID) assigned by the manufacturer (i.e. $40 or $1F).

If the Scan Tool receives multiple responses for a PID, such as MIL STATUS, it displays the PID and with the computer module ID blinking in parentheses.

MIL STATUS($10)

ON

MIL STATUS($1A)

OFF

ENGINE(RPM)($10)

256[

ENGINE(RPM)($1A)

261~

If one or more modules stops responding, the scan tool displays a message that the module is not responding and asks to continue without it. If No is selected, the Scan Tool attempts to reestablish communication with that module.

If one or more control modules stops responding, the tool will display a message that it is not responding. If you choose to continue, dashes will replace the module ID.

Module $1F is not Responding. Continue Without it?

Yes

Press FUNC to return to the GM Function List.

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Image 76
Actron 9640 user manual Select Pid Group ` Analog Misfire, MIL STATUS$10 MIL STATUS$1A OFF ENGINERPM$10, ENGINERPM$1A
Page 75 Page 77

9640 specifications

The Actron 9640 is a distinguished automotive diagnostic tool that has garnered attention for its versatility and user-friendly design. Designed for professional mechanics and DIY enthusiasts alike, the Actron 9640 stands out for its comprehensive features and advanced technologies that simplify vehicle diagnostics.

One of the main features of the Actron 9640 is its ability to read and erase diagnostic trouble codes (DTCs) for a wide variety of vehicles. This tool supports OBD II protocols, allowing it to communicate with a vast array of vehicles produced after 1996. The device provides clear, detailed descriptions of any trouble codes, enabling users to quickly identify and address issues. This is vital for efficient troubleshooting and ensures that users can make informed decisions about repairs.

Another significant advantage of the Actron 9640 is its built-in memory. The device can store code definitions and repair solutions for easy reference during diagnostics. Additionally, it features a robust data logging capability, allowing users to capture live data in real-time, which is essential for performing thorough diagnostic evaluations. This functionality helps in monitoring engine performance, thereby assisting in pinpointing issues that may not always trigger a check engine light.

The Actron 9640 also incorporates a user-friendly interface, equipped with a large LCD display that presents information in an easy-to-read format. Its intuitive navigation and menu options cater to users of varying expertise, making it accessible to beginners while still offering the depth of features that seasoned professionals rely on.

In terms of connectivity, the Actron 9640 is designed to be compatible with various vehicles, supporting multiple protocols beyond OBD II, including CAN, J1850, and ISO9141. This broad networking capability ensures that the device can diagnose problems across different car brands and models.

Built with durability in mind, the device features a robust housing that can withstand the rigors of a workshop environment. The ergonomic design ensures a comfortable grip during use, making it practical for extended periods of diagnostics.

Overall, the Actron 9640 combines advanced features, comprehensive functionality, and ease of use, making it an excellent choice for anyone looking to conduct reliable automotive diagnostics. Whether you're a professional mechanic or a casual car owner, the Actron 9640 can help you maintain your vehicle's performance effectively.
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