Circuit Description
WARNING: This page is about a different car, the 1998 Cadillac Eldorado and 1998 Cadillac DeVille. However, it is still accessible from the selected car via links, so may be relevant.
When ignition switch is turned to RUN position, SDM performs tests to diagnose critical internal malfunctions. SDM measures to ensure IGNITION POSITIVE VOLTAGE is within normal range. During DEPLOYMENT LOOP CONTINUITY test, SDM measures voltage difference between DRIVER FRONTAL HIGH and DRIVER FRONTAL LOW.