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Home >> Pontiac >> 2009 >> G3 Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 98 (Supplemental Inflatable Restraint System) >> Diagnostic Information and Procedures >> Sensing and Diagnostic Module Integrity Check >> Circuit/System Description

Circuit/System Description

WARNING: This page is about a different car, the 2011 Chevrolet Aveo. However, it is still accessible from the selected car via links, so may be relevant.

When the SDM recognizes ignition voltage greater than 9 volts at the SDM, the air bag indicator flashes 6 times to verify operation. At this time the SDM performs turn-on tests followed by resistance measurement tests and continuous monitoring tests.

When malfunction is detected, the SDM sets a current DTC and illuminates the air bag indicator.

When the malfunction is no longer detected and/or the ignition switch is cycled, the SDM will clear current DTCs and move them to a history file, except for the DTCs B1620, B1650, B1651, B1652, B1657. These DTCs will not be cleared by a scan tool because these codes require replacement of the SDM. The SDM must be replaced only after the malfunction that set the DTC has been repaired.

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