Grand Voyager V6-3.8L VIN L (1999)
Air Bag Control Module: Description and Operation
SYSTEM OPERATION
The Airbag Control Module (ACM) contains the impact sensor and energy reserve capacitor. The ACM monitors the system to determine the
system readiness. The ACM contains on-board diagnostics and will light the AIRBAG warning lamp in the message center when a problem
occurs.
The driver and passenger airbag system is a safety device designed to reduce the risk of fatality or serious injury, caused by a frontal impact of the
vehicle.
The impact sensor provides verification of the direction and severity of the impact. One impact sensor is used. It is located inside the Airbag
Control Module (ACM) which is mounted on a bracket, just forward of the center console. The impact sensor is an accelerometer that senses
deceleration. The deceleration pulses are sent to a microprocessor which contains a decision algorithm. When an impact is severe enough to
require airbag protection, the ACM micro processor sends a signal that completes the electrical circuit to the driver and passenger airbags. The
sensor is calibrated for the specific vehicle and reacts to the severity and direction of the impact.
