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

Principles of Operation (How Does It Work?)

Vehicle Security Module (VSM)

PRINCIPLES OF OPERATION

The vehicle security module (VSM) controls the following Systems:
- perimeter alarm
- remote keyless entry (and panic feature)
- computer-operated locks
- autolamp