Air Bag Control Module (ACM)

Air Bag Control Module (ACM) continuously monitors air bag system for faults to ensure driver-side and/or passenger-side air bag deployment will occur when necessary. There are no external impact sensors, it is all contained within ACM. Other components of air bag system include AIRBAG warning light, driver-side air bag module, clockspring, passenger-side air bag module, passenger-side air bag on/off switch and related wiring. When vehicle is started, AIRBAG warning light should illuminate for 6-8 seconds, then turn off. If AIRBAG warning light remains illuminated, a fault is indicated in air bag control system or CCD bus network between all body control modules. ACM has its own set of Diagnostic Trouble Codes (DTC). ACM DTC are not permanent and can clear when reason for code is corrected. When AIRBAG warning light is illuminated, see appropriate AIR BAG RESTRAINT SYSTEMS article.