ELM327 FAQ's

Published on November 19, 2015 by Nick
ELM327 FAQ's

My scanner's power light is constantly flashing and I cannot connect to it by Bluetooth, what am I doing wrong?
The case is most likely that the scanner you purchased is defective. It should be exchanged for a working unit.

What is the difference between OBD2 and OBDII?
None, there is no difference.

My scanner is not pairing, what am I doing wrong?
Assuming you have a Bluetooth scanner, you can request the pairing code from the vendor you purchased the scanner from. If it continues to refuse to pair and you have tried all of the default pairing codes '0000', '1234', '5678', etc. We suggest to return the scanner to the vendor and purchase from another seller.

My scanner is not connecting to my iPhone, what should I do?
Assuming you have purchased the Wifi model of the scanner (the Bluetooth model is not supported), you should consult the quick-setup guide that we have provided in this guide. If your scanner continues to refuse to connect, consult with the corresponding trouble-shooting points in the guide and if all else fails, return the scanner to whomever you purchased from and get a scanner from a reliable seller.

My Wifi scanner is not broadcasting an SSID Signal, what's wrong?
This is most likely the sign of a defective unit. Contact the person you purchased it from and ask them to exchange for a tested unit or just buy from a reliable seller.

Can I update from v1.4 to v1.5 firmware?
There is no way to apply this sort of update, you will need to purchase a new device.

The interface is reporting that there is no response from the ecu, what do I do?
This is likely a sign of a defective unit. To be sure, disconnect the scanner and plug it into another vehicle. If the vehicle is running and it continues to offer you trouble the part will likely need to be exchanged for a new unit.

How do I change the COM-Port number assigned to the device?
Go to the Device Manager control panel and locate the OBD2 Adapter under the 'Ports (COM & LPT)' sub menu. It may be titled 'USB Serial Port', if you can't locate it, unplug the adapter and plug it back in, you can watch it show up in real-time. Right click on the device and click 'Properties', click the 'Port Settings' tab and finally the click 'Advanced' button. Here you can change the COM-Port number, we suggest any COM Port between 2 and 5. Click 'Ok' to save your settings.

I have paired a Bluetooth OBD2 Adapter to my computer but when I attempt to connect to the assigned COM-Port it will not connect to the interface. What do I do?
We suggest reinstalling the device drivers. Here is a step by step walk-through: These instructions are written specifically from Windows 7, if you are using a different Windows Operating System, the steps you need to take should be similar.

    1. Open the Device Manager control panel
    2. Find the COM & LPT menu and right click on the item titled 'Standard Serial over Bluetooth link' and select Uninstall. If there are two items, uninstall each of them.
    3. From the Bluetooth control panel, also remove the OBD-II adapter from there, right-click and remove the device.
    4. Start your vehicle, plug in the adapter and click to 'Add a Device' in the Bluetooth menu. It will come up and you can enter the pairing code.
    5. Let everything re-install from scratch, it might take a minute or two for the adapter to finally show up in the device manager under the COM & LPT menu. You can have that open during the entire installation to watch its progress.
    6. If the COM-Port was set 4 or similar before, it should install to the same COM-Port. We suggest using any COM 2-5. This can be changed from the properties menu.

Open easy EasyOBD-II (this can be downloaded from our website) and connect to the COM-Port. The device at this point will begin to identify your scanner hardware and you are ready to 'Go Online' with your vehicle. If you changed the COM-Port during this process and EasyOBD-II is unable to connect to your diagnostic scanner, we suggest to conduct the reinstallation a second time starting from step one.

Where shoud I buy my scanner?
The scanners can be purchased from sellers Amazon, eBay, Sears, NewEgg and a few other select websites. Reliability of these scanners is hit and miss as they are generally sold by small business with as few as a single person managing all operations of the business. It is important to purchase high quality diagnostic tools from sellers who understand the product and can help you get it connected from start to finish. If the seller has little to no knowledge of the product, it is suggest to not purchase from them. The reliability of these scanners can be poor and instruction to get the scanner connected can be limited. To avoid these hassles, we recommend to purchase a scanner directly from us as these scanners are generally free from faults and defects.


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