TunerSync user guide

Follow the steps for the task you want to do. Accessport file tools work without a Dotson Tuning project. Project features use your customer portal account.

Choose a topic

Connect your Accessport

Use the Accessport file tools without signing in to a Dotson Tuning project.

  1. Open TunerSync on an Android phone that supports USB host connections.
  2. Connect the Accessport with a USB data cable and a compatible phone adapter if needed.
  3. Tap Allow when Android asks for USB access. TunerSync connects automatically once access is granted.
  4. Check the AP status at the top of the AccessPort files screen. Tap it, or open the three-dot menu → AP connection, for details and Retry connection.
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Find and copy files

Location selects the device. Type selects the kind of file.

  1. On AccessPort files, choose Location → On Accessport or On this phone.
  2. Choose Type → Maps, Logs, Presets, Startup screen or Screenshots.
  3. To save AP files on the phone, select them and choose Copy to phone.
  4. To bring an existing file into the app, use the matching Import action, then switch to On this phone to review it.
  5. For a saved map, choose Copy map to Accessport. Review the destination and confirm Copy and verify. Other supported AP files have their own Copy to Accessport action.
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Startup screen and logging presets

Preview a startup screen before replacing it, or manage a saved logging preset.

  1. Connect the AP and choose Type → Startup screen to view the supported custom screen currently on it.
  2. Choose Choose screen, select a replacement and review the preview.
  3. Tap Copy to Accessport and review the confirmation before replacing the screen.
  4. For logging presets, choose Type → Presets. If a saved preset is missing, use Scan AP for saved presets.
  5. Use Import preset to bring a preset into the phone, then review it under On this phone before copying it to the AP.
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Remove or recover a file

Phone copies and Accessport files have separate removal controls.

  1. For an AP file, open its three-dot menu and choose Remove from Accessport.
  2. Review the filename and AP, then confirm Back up and remove. The app saves a phone backup before removing the AP file.
  3. For a phone copy, select it under On this phone and choose Remove phone copies.
  4. Use Recently removed in the phone file view to recover a removed phone copy.
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Check AP firmware

TunerSync checks for published firmware updates when the AP connects.

  1. Connect the Accessport and allow the firmware check to finish.
  2. If a newer firmware notice appears, open Details. You can also open AP connection to see firmware information.
  3. Use Check again to repeat the check while connected.
  4. Use COBB Accessport Manager on a compatible computer to install firmware updates.
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Open your Dotson Tuning project

Connect the same customer account used for your inquiry, invitation or purchase.

  1. Tap Projects, then Connect portal account.
  2. Sign in using the email address associated with your Dotson Tuning project and approve the app connection.
  3. Return to TunerSync and open your project.
  4. Use Projects to choose another project. Completed and archived projects are grouped separately from active work.
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Next steps and vehicle setup

Your project Overview keeps the next action, current map and log uploads together.

  1. Open Overview and read the Next steps card.
  2. Choose Read instructions to view Calvin’s instructions for the project.
  3. Use Complete setup when requested, or open Vehicle & AP → Edit vehicle to update your vehicle and fuel details.
  4. Save your details to the project. With the correct AP connected, use Send AP details to record its information in the project.
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Get your map and upload logs

Transfer files directly between your Dotson Tuning project, phone and Accessport.

  1. In Overview → Current map, review the filename, revision, fuel and instructions.
  2. Choose To Accessport to transfer the map to the connected AP, or Save to phone to keep a phone copy. Review any confirmation before transferring.
  3. To send logs, choose Upload logs, then From connected Accessport or Saved on this phone.
  4. Select the requested logs, choose Review, enter the revision, fuel and notes, then tap Send files.
  5. Use View uploads to check your logs, or the project’s three-dot menu → File history to see project files.
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Send messages and photos

Keep questions and photos in the project conversation.

  1. Open a project and choose Messages.
  2. Type your message. To attach photos, tap the + button beside the message field and choose up to four photos.
  3. Review the message and selected photos, then tap Send.
  4. Tap a photo in the conversation to view it larger.
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Turn on project alerts

Get app alerts for project updates and new project messages.

  1. In Projects, open Account and choose Turn on project alerts.
  2. Choose Turn on and allow notifications when Android asks.
  3. Tap an alert to open the related project update or message.
  4. Return to Account → Project alerts to check the connection or turn alerts off.
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Connection help and account controls

Start with the connection that is having trouble: USB, internet or your portal account.

  1. For an AP connection problem, check the USB data cable and adapter, reconnect the AP and approve Android’s USB prompt.
  2. Open AP connection → Retry connection. Share connection report is available if support needs the connection details.
  3. For a project loading problem, check internet access and use Refresh. Confirm the account email if the expected project is missing.
  4. Use Account → Sign out when you want to disconnect your portal account. Phone files remain on the phone.
  5. For privacy or account removal help, open the privacy or Request account deletion option. Send your request for review; opening the page alone does not delete anything.
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Email logs to your own tuner

Send selected files from the app using your verified reply email, without a Dotson Tuning project.

  1. Open the AccessPort files three-dot menu → My tuner and save your tuner’s name and email address.
  2. For AP logs, select the files and tap Send to tuner. Wait for the phone copies to finish, then choose Review email. For phone logs, select them and choose Share selected → Send to tuner.
  3. If asked, enter your email and choose Send verification code. Enter the 8-digit code from your email and tap Verify email.
  4. The app returns you to message creation after verification. Enter the vehicle, revision, fuel and notes, then choose Continue.
  5. On Email review, check the recipient, reply address, message and attachments, then tap Send now.
  6. Use Sending email → Check status if you need to check the saved result.
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Receive a map from your tuner

Import a .ptm map attachment, review it, then choose when to copy it to the AP.

  1. Open the .ptm attachment in your email app and choose TunerSync.
  2. Review the imported map and save it to your phone.
  3. If your email app does not offer TunerSync, download the attachment, then choose Location → On this phone → Import file → Map in TunerSync.
  4. Connect the AP, choose On this phone → Maps and tap Copy map to Accessport.
  5. Review the destination, confirm the transfer and wait for it to finish.
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Calculate an ethanol blend

Use tank percentages for the starting level and desired fill level. Results show how much of each fuel to add.

  1. Open the AccessPort files or project three-dot menu → Ethanol calculator. The calculator is free; no purchase is needed.
  2. Choose Set tank capacity. Enter and confirm your actual tank size, including any custom tank, then Save. You can use Look up a tank size as a starting point and confirm it matches your tank.
  3. Choose US gallons or Liters for tank capacity and fuel results.
  4. Under Fuel in your tank, enter Amount in tank (%) and the ethanol percentage of that fuel.
  5. Under Your fill, enter Fill to (%) and Target ethanol %. For example, 25 for Amount in tank and 75 for Fill to means starting one-quarter full and finishing three-quarters full.
  6. Under Fuel at the pump, enter the measured ethanol content in First fuel % and Second fuel %.
  7. Tap Calculate blend and review the amount of each fuel to add. If the requested blend is not possible with those inputs, correct the inputs or choose a reachable target.
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Need help? Email appsupport@dotsontuning.com with your app version and the error you see.

Find this guide in the app’s three-dot menu → User guide.