Cause

The SDM connector has a dual-action shorting bar across terminal cavities 6 & 7, which connects the AIR BAG telltale lamp to ground. One end of the dual-action shorting bar is opened when the SDM connector is fully seated in the SDM. The other end of the shorting bar is opened when the CPA device is fully seated in the SDM connector. The CPA device also locks the SDM connector body into the SDM module

If the ignition is turned to the ON position and either the CPA is not fully engaged or the SDM connector is not fully seated, the shorting bar will cause the AIR BAG telltale to turn On and set a DTC 61.