The DualShock 4 controller can now be used wirelessly with the PlayStation 3 following a recent update for Sony’s last generation console (4.60 firmware update). Until this moment, the DualShock 4 could only be used with the PS3 via USB.

These are great news, but there are also a few catches. The controller is registered on the PlayStation 3 as a generic controller and because of that, only basic controller inputs are compatible (rumble and motion control are not supported).

If you want to set up your DualShock 4 for you PS3, the following steps must be done:

• Go to ‘Accessory Settings’ on the PS3 system menu
• Select ‘Manage Bluetooth Devices’
• ‘Register New Device’ to begin scanning for a new device
• Press and hold both the Share Button and PS button on the DS4 until the light starts blinking
• The controller will be detected by the PS3 as a ‘Wireless controller’
• Select it to complete registration

Source:  Reddit User Shafiggy16