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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 151 (Air Bag Restraint Systems) >> Diagnostic Tests >> DTC B0029: Passenger Head Impact Air Bag Deployment Loop Open >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2002 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

When ignition is turned on, SDM performs tests to diagnose critical internal malfunctions. SDM monitors passenger head impact air bag module high-side and low-side circuit voltage differences. SDM uses voltage difference to calculate circuit resistance. A high deployment loop resistance indicates an open in passenger head impact air bag module deployment circuit.

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