Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Radio System

There are three radio systems available this year that will be on the CCD bus. They are the RBR, RBN and RAZ models. The main reason they are on the bus is because of the radio remote controls in the steering wheel. They can control volume up/down, seek up, seek down and preset station selections. These systems also communicate with the body control module and will set a specific code if there is a problem with the remote controls.

The RBR will have 4 speakers and the others will have 8 speaker locations (infinity sound). All of the 4 main quarter speakers have a built in amplifier. The instrument panel and pillar speakers receive their signals from the quarter speakers. Depending on the manufacture some systems will have a Front/Rear channel system and others will have a Left/Right channel system. If one of the main quarter speaker audio circuits experiences a short, the other speakers on that channel will also shut down until the circuit is repaired. The radio will also set a trouble code, which is assessible with the DRB, indicating which channel is effected.