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

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Air Bag Control Module: Service and Repair

Prior to performing replacement procedures, disarm air bag system. Refer to, Service and Repair/ Air Bag System Disarming & Air Bag System Arming. Refer to, / Specifications/ Mechanical for torque values when installing components.
All sensors and mounting bracket bolts must be carefully torqued to assure proper operation. Never power up the air bag system when any sensor is not rigidly attached to the vehicle, since the sensor could be activated when not attached, causing air bag deployment.



Do not open DERM case for any reason. Touching connector pins or soldered components may cause electrostatic discharge damage. Repair of a malfunctioning DERM is by replacement only.

1. Remove DERM from mounting bracket.
2. Remove Connector Position Assurance (CPA) lock, then disconnect DERM electrical connector from DERM.
3. Reverse procedure to install.