Some radio systems available on the JR communicate on the PCI Bus. - Что такое JR и каким образом его можно перевести в данном предложении?

Как правильно перевести dimming information и equalization information в следующем контексте:
They use the bus for four reasons. The first is to communicate trouble codes, second is to receive dimming information, third is to receive cabin equalization information and fourth is to control the remote radio switches located on the back of the steering wheel.

THANK YOU A LOT IN ADVANCE.