GM Historic (OBD I) Diagnostics

A message appears asking if you are sure. Press LEFT/RIGHT to move the brackets to the desired response and press ENTER.

Selecting NO and pressing ENTER returns you to the GM Function List.

Erase Codes?

Are You Sure?

Yes <No>

Selecting YES displays a screen prompting you to turn ignition ON. Turn ignition key ON. Engine can be off or running. Press ENTER to continue.

Turn Ign Key On

Engine Can Be Off

Or Running.

Press ENTER To Cont

A message confirming that the Erase Codes command was successful displays. Press ENTER to return to theGM Function List.

Manual Erase Methods

Erase Codes Command

Sent. Perform READ

CODES Function To

Verify Erase.

Alternate Method 1:

 

1)

Turn Ignition Key Off.

 

5

2) Locate Fuse Box and Remove ECM Fuse.

3)

Wait 20 seconds.

 

 

4)

Replace the Fuse.

 

Alternate Method 2:

1)Turn Ignition Key Off.

2)Remove Power from Scan Tool.

3)Disconnect Scan Tool from Vehicle.

4)Remove Negative (-) Battery Cable. Wait 30 seconds, then replace the cable.

The computer has a “learning” ability to compensate for minor variations in engine operation. Whenever power is removed from the PCM, the computer must “relearn” various functions. Vehicle performance may be noticeably different until this is accomplished. This is a temporary situation and is normal. The “learning” process takes place during warm engine driving.

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Actron 9640 user manual Erase Codes? Are You Sure? Yes No, Turn Ign Key On Engine Can Be Off Or Running Press Enter To

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.