Air Bag Restraint Systems: Diagnostics: Notes
WARNING:
Always follow air bag service precautions to avoid air bag deployment and possible personal injury. Refer to procedure under See AIR BAG SAFETY PRECAUTIONS
. After component replacement, ensure proper system operation. See SYSTEM OPERATION CHECK
.
CAUTION:
When battery is disconnected, vehicle computer and memory systems may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. See Computer Relearn Procedures in the Reference Information section.
NOTE:
Although other scan tools are available, manufacturer recommends using Diagnostic Readout Box (DRB) tester to access SRS on-board diagnostics. Following diagnosis and testing procedures are designed for use with DRB.
SRS is monitored by Occupant Restraint Controller/Air Bag Control Module (ORC/ACM). ORC/ACM contains safing sensor, an integral sensor in circuitry of system, which is used to deploy air bag modules.
ORC/ACM monitors critical input and output circuits within air bag system, ensuring they operate correctly. Some circuits are tested continuously; others are checked under certain conditions. ORC/ACM provides information about air bag system, through AIR BAG warning light and DRB tester. Each circuit monitored by ORC/ACM has a corresponding fault code (fault message) assigned to it.