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

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Principles Of Operation




Driver Seat Module (DSM)

Principles of Operation

The Driver Seat Module (DSM) receives the seat adjust switch input information over the Standard Corporate Protocol (SCP) network communication from the Driver Door Module (DDM) and operates the seat motors to the desired position. The DSM monitors the seat position and adjustable pedal sensors to determine how long to operate each specific seat motor and adjustable pedal motor when the memory function is being commanded. The DSM is only on vehicles equipped with memory seats and memory adjustable pedals.