CTS 2003-2005

Warning Light


The AIR BAG warning lamp indicates the words "AIR BAG" for domestic vehicles. For Canadian and some export models, the AIR BAG warning lamp is an icon graphic. The ignition switch applies ignition voltage to the AIR BAG warning lamp. The AIR BAG warning lamp receives power whenever the ignition switch is at the ON or START positions. The inflatable restraint SDM controls the lamp by providing ground with a lamp driver. The SIR system uses the AIR BAG warning lamp to do the following:

Verify lamp and SDM operation by flashing the lamp seven times when the ignition switch is first turned to the ON position.
Warn the vehicle driver of SIR electrical system malfunctions which could potentially affect the operation of the SIR system. These malfunctions could result in non-deployment in case of a frontal crash or deployment for conditions less severe than intended.

The AIR BAG warning lamp is the key to driver notification of SIR system malfunctions.