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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 27 (Supplemental Restraints System) >> Diagnostic Information and Procedures >> DTC B1A7A >> Circuit/System Description

Circuit/System Description

WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.

When the ignition is turned ON, the K36 Restraints Control Module and the K85P Restraints Occupant Classification System Module perform tests to diagnose critical malfunctions. Upon a successful power-up mode the Restraints Control Module will illuminate both PASSENGER AIRBAG ON/OFF indicators located in the A103 Roof Console. If the Restraints Control Module detects a fault in the Restraints Occupant Classification System Module, it may disable the front passenger Airbag deployment loop, set DTC B1A7A and illuminate the AIRBAG indicator.