LG Diagnostic Serial port - ChimeraTool help

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LG Diagnostic Serial port

This document created at Sep 14, 2016, 11:45:18 AM and modified at Apr 14, 2021, 5:35:19 PM.

You can learn here how to enable the LG Diagnostic Serial Port.

For some functions (for example imei repair or Network Factory Reset) you will need to enable the Diagnostic Serial Port. If this is not enabled you will get an error during the procedure saying 'Diag port unavailable'. This is also vital for the 'Developement Support', so that we can in turn support new models for you.

How to enable the LG Diagnostic Serial port:

For older models:

  1. Unlock the screen of the LG Andriod phone.
  2. Connect the the LG Andriod phone to the PC with a normal USB cabel.
  3. On the screen of the LG Andriod phone, select the USB connection mode 'LG software'.

For newer models:

  1. Dial in the following codes onto your phone (without pressing call). If the code works a hidden menu will appear. Find the option 'Port Check Test', and set it to 'Enabled'. It is usually in the top menu or in the 'SVC Menu' submenu. (substituted with the numbers in your model's name, for example 3845#*# will be 3845#*505# for LG-D505)
  2. 277634#*#
  3. 3845#*<model name numbers>#
  4. *#546368#*<model name numbers>#

In case you cannot get to the hidden menu, or the hidden menu does not contain the option 'Port Check Test', please try the Factory Reset on the phone.

 

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