Circuit Description

When the ignition switch is turned to ON, the sensing and diagnostic module (SDM) will perform a turn-on test to diagnose critical malfunctions within the SDM itself.

In case of the passenger side air bag inflation by side impact, the SDM maintains the warning lamp ON. The passenger side pretensioner, passenger side air bag module, side impact sensor and SDM should be replaced. After replacing these parts, the air bag system should be checked for proper operation.