Operation CHARM: Car repair manuals for everyone.
Home >> BMW >> 2004 >> 645Ci Convertible (E64) V8-4.4L (N62) >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Information Bus >> Description and Operation >> Bus Functions >> Bus Analysis >> System Analysis (From 2005_09) >> System Circuit Diagram
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

System Circuit Diagram



System circuit diagram

The following block diagram provides an overview of the control modules and bus systems deployed in the vehicle.







- KGM (Body Gateway Module)
- Control module with connection to K-CAN, PT-CAN and diagnosis lead
- CCC (Car Communication Computer) or M-ASK (Multi Audio System Controller)
- Control module with connection to K-CAN and MOST
- DSC (Dynamic Stability Control)
- Control module with connection to F-CAN and PT-CAN
- AFS (Active steering)
- Control module with connection to F-CAN and PT-CAN
- K1... Kn: control modules on the K-CAN
- M1... Mn: Control modules on the MOST
- F1... Fn: Control modules on the F-CAN
- PT1... PTn: Control modules on the PT-CAN
pro multis · About Operation CHARM