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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Arming Sensor


This sensor is a normally open mechanical switch that closes during deceleration encountered in an accident. The arming sensor is wired in series with the steering wheel module and provides backup to the other sensors. A parallel resistor in the arming sensor permits a small amount of current to flow through the initiator circuit for diagnostic purposes.