Introduction
This manual provides instructions for the proper use and maintenance of the GODIAG Original OBD2 Extension Cable, Model SF276. This cable is designed to extend the connection between a vehicle's OBD2 port and a GODIAG GT100 or GT100+ ECU Breakout Box, facilitating diagnostic and testing procedures.
Product Overview
The GODIAG OBD2 Extension Cable (SF276) is a specialized diagnostic accessory. It features a standard OBD2 male connector, two OBD2 female connectors, and a DB15 connector, allowing for flexible connections in automotive diagnostic setups.

Image: The GODIAG OBD2 Extension Cable, showing its three distinct connectors: one male OBD2, two female OBD2, and one DB15 connector.
Setup Instructions
- Connect to Vehicle: Locate the OBD2 diagnostic port in your vehicle, typically under the dashboard on the driver's side. Connect the male OBD2 connector of the extension cable to the vehicle's OBD2 port. Ensure a secure connection.
- Connect to GODIAG GT100/GT100+ Breakout Box: Connect the DB15 connector of the extension cable to the corresponding port on your GODIAG GT100 or GT100+ ECU Breakout Box.
- Connect Diagnostic Tool: Connect your diagnostic scan tool or other testing equipment to one of the female OBD2 ports on the extension cable. This allows the diagnostic tool to communicate with the vehicle via the breakout box.

Image: The extension cable facilitating a connection between a GODIAG GT100 breakout box and a diagnostic tablet, illustrating a typical setup.

Image: A GODIAG GT100 breakout box in use, connected to a vehicle's OBD2 port, demonstrating the cable's application in a vehicle environment.
Operating Instructions
Once the GODIAG OBD2 Extension Cable is properly connected, it serves as a pass-through for communication between your vehicle, the GODIAG GT100/GT100+ breakout box, and your diagnostic tool. The breakout box allows for monitoring of communication lines and power supply during diagnostic procedures.
- Power On: Ensure your GODIAG GT100/GT100+ breakout box and diagnostic tool are powered on according to their respective manuals.
- Diagnostic Procedures: Perform diagnostic tests, ECU programming, or other functions as required by your specific diagnostic tool and the vehicle's requirements. The extension cable ensures stable data transmission.
- Monitoring: Utilize the features of the GT100/GT100+ breakout box to monitor voltage, ground, and communication signals (e.g., CAN, K-Line) during operations.
Maintenance
To ensure the longevity and reliable performance of your GODIAG OBD2 Extension Cable, follow these maintenance guidelines:
- Storage: Store the cable in a clean, dry environment, away from direct sunlight and extreme temperatures. Avoid kinking or tightly coiling the cable.
- Cleaning: If necessary, gently wipe the cable and connectors with a soft, dry cloth. Do not use harsh chemicals or abrasive cleaners.
- Inspection: Periodically inspect the connectors and cable for any signs of damage, such as frayed wires, bent pins, or cracked housing. Do not use a damaged cable.
- Handling: Always grasp the connector housing when plugging or unplugging the cable. Avoid pulling directly on the cable itself.

Image: A detailed view of the cable's connectors, highlighting the importance of careful handling to prevent pin damage.
Troubleshooting
If you encounter issues while using the GODIAG OBD2 Extension Cable, consider the following:
| Problem | Possible Cause | Solution |
|---|---|---|
| No communication with vehicle/tool. | Loose connection, damaged cable, incorrect port. | Ensure all connectors are securely seated. Inspect the cable for visible damage. Verify the correct OBD2 port is used. |
| Intermittent connection. | Cable wear, pin corrosion, unstable power. | Check for bent or corroded pins. Ensure the vehicle's battery voltage is stable. Replace cable if wear is significant. |
| Diagnostic tool not recognizing breakout box. | Breakout box issue, software conflict. | Refer to the GODIAG GT100/GT100+ manual for troubleshooting. Ensure diagnostic tool software is up to date. |
Specifications
The following are the technical specifications for the GODIAG Original OBD2 Extension Cable (Model SF276):
- Model: SF276
- Brand: GODIAG
- Connector Type: OBD2 Male, OBD2 Female (x2), DB15
- Compatibility: GODIAG GT100, GODIAG GT100+ ECU Breakout Box
- Automotive Fit Type: Vehicle Specific Fit
- Item Weight: Approximately 8.5 ounces (240 grams)
- Package Dimensions: Approximately 8 x 6.3 x 1.2 inches (20.3 x 16 x 3 cm)
- UPC: 889327085590
Warranty and Support
For warranty information and technical support regarding your GODIAG Original OBD2 Extension Cable, please refer to the documentation provided with your GODIAG GT100/GT100+ ECU Breakout Box or visit the official GODIAG website. Keep your purchase receipt for warranty claims.
Manufacturer: GODIAG
Contact: Please refer to the contact information provided with your GODIAG product or visit the official GODIAG support page.





