Stratus V6-2.5L VIN H (1997)
Body Control Module: Description and Operation
Airbag System
Fig. 1 Airbag Restraint System
AIRBAG SYSTEM
The airbag system is designed to provide increased driver and passenger protection if the vehicle is involved in a front-end collision. The system is
most effective when used in conjunction with the seat belt system. Currently, Chrysler Corporation uses two types of airbag control modules. The
ASDM system is a mechanically-triggered system utilizing two front impact sensors and a sensor inside the module. The AECM is an
electronically-triggered system that used only its own internal electronic sensor to trigger the airbags. The JA and JX Bodies used only the AECM
system.
Whenever the ignition key is turned to the "run" or "start" position, the Airbag Control Module (ACM) performs a lamp check by turning the
AIRBAG warning lamp on. The lamp stays lit for 6 to 8 seconds, then goes off. If the lamp remains off, it means that the ACM has checked the
system and found it to be free of discernible malfunctions. The airbag system is monitored by the ACM.
The ACM monitors critical input and output circuits within the airbag system, making sure they are operating correctly. Some circuits are tested
continuously; others are checked only under certain circumstances. The ACM provides diagnostic information about the airbag system to the
technician through the DRB via the CCD bus.
The deceleration or G-force resulting from the impact of a front-end collision causes the electronic sensor inside of the ACM to be triggered. This
causes the inflators to be actuated, thus deploying the airbags. The total time between determining to deploy and deflation of the airbag is 1/10th
of a second.
The AIRBAG warning lamp is the only point at which "symptoms" of a system malfunction can be observed by the customer.
Use the test procedures to find the cause of any customer complaint regarding the AIRBAG warning lamp, such as:
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warning lamp does not come on at all
-
warning lamp stays on
COMPONENTS
The major components of the SRS are;
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The Airbag Module
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The Clockspring
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The Impact Sensors
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The Airbag System Diagnostic Module (ASDM or PASDM).
If any of these parts should fail, they must be replaced, as they cannot be repaired.
NOTE: Use the test procedures in Testing & Inspection to find the cause of any customer complaint regarding the "Air Bag" warning lamp.
GLOSSARY OF TERMS USED
Active Codes: A malfunction that is present now.
