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The Titan One, via the MaxAim DI plugin, can be used to interface PC compatible Steering Wheels to be used on PS4 (and also on PS3, XB1, Xbox 360, PS TV, Switch). The MaxAim DI captures the wheel inputs, convert these inputs according to user made layout and, through the Titan One device, sends the commands to console.
For example, the connections for PS4:
(1) Titan One on PS4;
(2) Titan One on PC (mini-USB cable: PCPROG);
(3) PS4 controller on the Titan One input port;
(4) The Steering Wheel connected on PC.
MaxAim documentation:
http://www.consoletuner.com/kbase/maxai ... cation.htm The video liked below shows how this setup works for the Driving Force GT, the approach is the same for any Steering Wheel.
https://www.youtube.com/watch?v=m-a_hL9UhGM