How to Solve Launch X431 VCI Connection Failure or Firmware Update Failed?

Sometimes, LAUNCH X-431 tool may fail to connect to VCI or fail to communicate with vehicles or firmware update failed. If it appears, follow the solution below to resolve the problem.

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The solution:

Step 1:

Make sure the VCI connector is plugged into the vehicle OBD port and the vehicle ignition is on.

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Step 2:

Select “Software update” on the main menu of Launch scan tool (i.e.X431 Pro3S+) to check if the diagnostic software is the latest one, or tap “Select all” and “Update” to update the software directly.

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Step 3:

Select “Settings” on the home page

Tap “Connected devices”

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1.If the Bluetooth is connected, tap the device serial number>> FORGET>> FORGET DEVICE

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2.If the Bluetooth is not connected currently, tap Previously connected devices Connection preferences>> setting>> FORGET>> FORGET DEVICE

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Unplug the connector and wait for 20 seconds, then plug the connector again

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Tap Pair new device>> the device serial number

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Tick the button of allowing access to your contacts and call history

Tap “Pair” and the device will be paired.

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Step 4:

Tap Launch X431 tablet (i.e.X-431 Pro3S+)

Tap “User Info” on the main menu

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Tap Firmware Fix>> FIRMWARE FIX

Tap the device serial number to scan, and wait the firmware update is completed.

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Note:

The above solution also applies to X431 V, V+, PAD VII, PRO5, etc.

 

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