Finding an OBD2 to Ethernet cable, also known as an ENET cable, for your BMW can sometimes be a challenge, especially with import restrictions or when you need one urgently. Instead of searching endlessly for an “Obd2 To Ethernet Cable Near Me,” why not take the DIY route? Creating your own ENET cable at home is not only cost-effective but also a rewarding experience for any car enthusiast or DIYer. This guide will walk you through the process of making your own ENET cable using readily available components.
Parts You’ll Need to Build Your ENET Cable
Before you start, gather these essential tools and components, all easily sourced from online retailers:
- Soldering Kit: Essential for making secure electrical connections.
- Multimeter: To test resistor values and ensure correct connections.
- Ethernet Cable (10 Feet): Provides the base wiring for your ENET cable.
- OBD2 Connector (16-Pin): The connector that interfaces with your vehicle’s OBD2 port.
- 510 Ohm Resistor: A crucial component for proper cable function.
- Optional Combo Kit: Consider a combo kit that includes a soldering kit, multimeter, and cutter for convenience.
You can find these items at online retailers. Here are a few quick links for your convenience:
- Soldering Kit – https://amzn.to/2JVcr1h
- Multimeter – https://amzn.to/34dnAB8
- 10 Feet Ethernet Cable – https://amzn.to/3adGmw3
- OBD 2 connector – https://amzn.to/3qYUVJR
- 510 Ohm resistor – https://amzn.to/3ad8WO8
- Soldering Kit + Multimeter + Cutter Combo – https://amzn.to/3qRcQSO
Step-by-Step Guide to Building Your ENET Cable
Follow these steps to assemble your OBD2 to Ethernet cable:
Step 1: Prepare the Ethernet Cable
Cut your Ethernet cable in half. Slide the cable protector and boot onto one end of the cut cable. This end will eventually connect to the OBD2 connector.
Step 2: Expose and Identify the Wires
Carefully remove the outer plastic layer of the Ethernet cable to expose the internal wires. You’ll see a set of color-coded wires. Identifying these wires is crucial for correct pin connections. Tin the edges of each exposed wire using your soldering iron to make them easier to work with. Note that for this DIY, pins 4, 5, and 7 of the Ethernet cable (Blue, White/Blue, and White/Brown wires) are not needed and can be cut off.
Step 3: Open the OBD2 Connector
Open up your OBD2 connector. You’ll see 16 pins inside, arranged in two rows of eight. These pins are numbered from 1 to 16, which is important for the next step.
Step 4: Test the Resistor
Before soldering the resistor, use your multimeter to test its value. Ensure it reads within the range of 506-560 Ohms for optimal performance in your OBD2 to Ethernet cable.
Step 5: Solder the Connections
Refer to the pin diagram below to connect the Ethernet cable wires to the correct pins on the OBD2 connector. Solder each wire securely to its corresponding pin.
Here is a clear pin mapping for your reference:
| Ethernet Pin | Wire Color | OBD2 Pin |
|---|---|---|
| Pin 1 | White/Orange | Pin 3 |
| Pin 2 | Orange | Pin 11 |
| Pin 3 | White/Green | Pin 12 |
| Pin 6 | Green | Pin 13 |
| Pin 8 | Brown | Pin 4 & 5 |
Finally, solder the 510 Ohm resistor to Pins 8 and 16 of the OBD2 connector. This resistor is essential for the cable to function correctly.
Step 6: Final Assembly
Once all connections are soldered and secure, carefully close the OBD2 connector cover. Your DIY OBD2 to Ethernet cable is now complete!
Conclusion
Creating your own OBD2 to Ethernet cable is a straightforward project that saves you money and provides a valuable tool for BMW diagnostics and coding. Forget searching for an “obd2 to ethernet cable near me” and empower yourself by building one. Connect your homemade ENET cable to your BMW, hook it up to your laptop, and start enjoying coding and diagnosing your car right away!
