Lionel Trains: Power & Control logo

ENG Selection

Getting an engine up and running with the Cab3 APP is quick and easy!

Once the Cab3 is connected to the Base3, it’ll default to the home screen, as shown below:

At the very bottom of the screen, you’ll notice 5 buttons that correspond to different product controls. 
  • ENG: Engine. This is for running locomotives.
  • TR: Train. This is used when building a train consisting of more than one locomotive or command-equipped freight or passenger cars.
  • RTE: Route. This is for setting up and initializing routes on your railroad.
  • SW: Switch. For controlling command-controlled track switches.
  • ACC: Accessory. This is used for most command-controlled accessories.


For this section, we’re going to focus on ENG. Tap the ENG button to enter the engine selection menu as shown below:

This screen is used to either program an engine into the Base3 or to address an engine that has already had its ID set.
To program an engine using a new ID number:
  1. Slide the locomotive’s RUN/PGM switch to PGM and then turn on track power. (for Bluetooth or RF LionChief engines, use their respective RUN/PGM switches on the Base3).
  2. On the Cab3 APP in the ENG menu, enter the number you wish to assign the engine. In the image above, ID #6 was used. 
  3. Tap “SET” – the engine should make a sound or flash a light to indicate that it accepted programming. The APP will automatically return to the main control screen.
  4. Slide the engine’s RUN/PGM switch back to RUN. (for Bluetooth or RF LionChief engines, put their respective switch on the Base3 back to RUN).
  5. You’ve now assigned that number and are ready to run your engine!


To address an engine that has already had its ID set:

  1. With track power on, tap ENG on the Cab3 APP.
  2. Enter the TMCC ID number. 
  3. Hit enter. This will select that engine and automatically return to the main control screen.


The Cab3 APP is compatible with 4-Digit addressing locomotives. When you enter numbers past 2-digits, the number on the top left above the engine image will continue to increase. If you want to delete the number you’ve enter on accident, use the X backspace key below the 7 key.


The ENG screen also features start-up and shut-down buttons. This turns on or off the engine’s sound systems if so equipped with this feature.

For Legacy locomotives, tap the start-up or shut-down buttons for a short sequence. Tapping and holding those buttons will initialize an extended sequence that typically plays dialog.