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 logical successor to CHARM, I recommend you try it!
Link:
lemon-manuals.la
Multiplexing
The increased number of modules on the vehicle dictates a more efficient method of communication. Multiplexing is the process of communicating several messages over the same signal path. This process allows multiple modules to communicate with each other through the signal path (BUS+/ BUS-). Modules communicate with the
Powertrain Control Module (PCM) using Standard Corporate Protocol
(SCP) which determines the priority in which the signals are sent. Multiplexing reduces the weight of the car by reducing electrical wiring.