User Guide

See how easy it is to use the TGT Flash device on your vehicle, by following the steps below

Please note. We do recommend that you attach a Battery Support Unit (BSU) to the vehicle, to ensure it has enough power throughout the entire remapping process. Click here to download a PDF copy of these instructions.


Step 1

On a Windows based PC or Laptop, open a web browser and go to to download the TGT Flash software. Double click the downloaded ‘.exe’ file and run through the steps to install it to your computer. If prompted, we recommend saving a shortcut to your desktop.


Step 2

Once installed, open the program by double clicking the desktop icon. Plug in the TGT Flash device, using the supplied USB cable. The software will recognise your device and perform any updates required. Once completed, close the program window and unplug the device. You are now ready to use the TGT Flash device on your vehicle.


Step 3

To read your ECU, plug the TGT Flash (using the larger end of the cable) into your vehicle via the on-board diagnostic port (OBD). This is normally located beneath the dashboard on the driver’s side of the vehicle.


Step 4

Make sure your ignition is switched on (the vehicle doesn’t need to be running).


Step 5

As soon as it’s plugged in, the device will power up with the TGT Flash welcome screen.


Step 6

On the next screen, press the “Tuning” button, followed by the forward arrow to confirm vehicle Make, Model and Engine Specification. The next screen will ask to check your ignition is switched on.


Step 7

The device will now communicate with the vehicles ECU.


Step 8

On completion, the next screen will confirm there is no stock file on the device. Click Yes to read the ECU.


Step 9

TGT Flash will now download the data from the vehicle.


Step 10

The TGT Flash will prompt you once the read is complete. Unplug the device (which now includes your read file) from your vehicle. NB. The device only takes a copy of the original file and the vehicle can be driven as normal after this stage.


Step 11

Connect the device to to your computer using the enclosed USB cable. Open the TGT Flash Software and click on Download Data. The software will read and download the data file from the TGT Flash device, prompting you to choose a location to save the file.


Step 12

On the website, go to the ‘File Submit’ page. Please complete all fields on the form and then attach your file (click the ‘Attach File’ button and navigate to the location you saved it in previously). Submit the form once all fields are complete.

File turnaround time is typically 1 hour in our regular hours of 09:00-18:00, Monday to Friday, 9:00 – 13:00 Saturdays.

Your file will be modified by our in-house tuning team, using the vehicle information provided, the type of remap requested (Performance/Economy/Blend) as well as any additional requirements and emailed back to you (using the address given) once complete (make a note of the filename).


Step 13

Your modified file will be sent to the email address stated on the form. Save it to your desktop or suitable location. With the device plugged into your computer, open the TGT Flash software and click on Upload Data. Locate the saved file and click Start to transfer it to the device. Once the upload completes, you can now return to your vehicle to transfer the file.


Step 14

To add the file to your vehicle, plug the TGT Flash back in to the OBD port and select the “Tuning” button once again.


Step 15

The TGT Flash device will then display the included maps for you to choose from. Click the map you wish to transfer to the vehicle and click the forward arrow.


Step 16

The device will ask you to confirm that you wish to go ahead with writing the file. Click Yes to proceed with the transfer.


Step 17

You will be prompted to switch the ignition on and then confirm the transfer.


Step 18

Your file will now be transferred to the vehicle. This can take a number of minutes, so please be patient and ensure the vehicle remains with the ignition on during the entire process. A progress bar will display, giving an indication of the amount of information left to be transferred to the vehicle.


Step 19

Once complete, you will be presented with a screen confirming the completion and asking you to switch off your ignition and disconnect the TGT Flash.


Step 20

Once unplugged, make sure you disconnect any Battery Support Unit (BSU) that may have been connected during the remapping process. Your vehicle is now ready to be started and driven.


Your TGT Flash device can store up to 5 files for the car the tool is locked to: so you can easily have 4 maps written for the same vehicle. For example you could have the following stored on your device:

  • 1 x stock file for warranty/dealer or diagnostic purposes
  • 1 x Economy File (Modified)
  • 1 x Blend File (Modified)
  • 1 x Performance File (Modified)