GM Historic (OBD I) Diagnostics

Playback

The Playback function is used to playback a Record Data recording. This function is very similar to View Data. The only difference is that View Data is a real time viewing of PIDs, while Playback is a viewing of previously recorded PIDs.

Select Playback from the Review Data

Review

Data

?

screen and press ENTER:

 

1)DTC

(Codes)

 

` 2)Playback

~

✓If a recording does not exist in the tool memory, then the tool will display a “NO RECORDING PRESENT” message. Perform “Record Data” on page 5-5.

Select which list to playback. Refer to “Viewing Data” on page 3-11 of Using The Scan Tool for Entire or Custom Data Lists.

Playback Data As ? 1)Entire Data List

`2)Custom Data List

~

The Playback screen has a Vehicle

5

Data List header to mark the beginning of the data list. The recorded PIDs are displayed next. Line 4 displays the Frame number and Time in seconds.

• Use the UP/DOWN arrow keys to

Vehicle

Data List

?

scroll through the data line by line.

The end of the list is reached when

CODES

PRESENT

YES

 

the DOWN arrow icon is not visible.

CALC LOAD(%)

7.0[

• The LEFT/RIGHT arrow keys are

FRAME:

1 Time:

4.4

~

used to increase or decrease the

Frame/Time index. Time 0.0 is the

trigger point, when the user pressed ENTER. A time interval with a minus sign (–) occurs before the trigger point.

•The tool recording time varies. A recording consists of 5 frames of data prior to the trigger and several frames after the trigger. The number of PIDs recorded will determine the number of frames.

✓After reaching the last time interval recorded. The Time display will change from data recorded after trigger to data recorded before. This is normal. The LEFT/RIGHT arrows may be used to scroll through all time intervals in either direction.

✓Some vehicles will wait 3 to 4 minutes after the driveability problem first occurs before storing a trouble code in the vehicle’s on-board computer. If you selected Trigger On Codes when you made your recording, you might not see any drastic change in data parameters before and after the trigger point. In cases like this, it is better to manually trigger the start of the recording when the driveability symptom is first observed.

✓To change the selections of Custom Data List parameters, press the BACK key. This will return to the Custom Data List selection display screens. When done, press BACK to return to Review Data or FUNC to return to the GM Function List.

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Actron 9640 user manual Playback, 1DTC, Codes Present YES, Frame
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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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