The driver-side air bag squib circuit consists of the air bag sensor assembly, spiral cable and driver-side air bag module. The squib causes driver-side air bag to deploy when all deployment conditions are satisfied.
2004 ACCESSORIES/SAFETY EQUIPMENT Toyota - Air Bag Restraint Systems
DTC 14/B0101 could be caused by a open in D+ (Yellow/Black wire) or D- (Yellow wire) in squib circuit, squib malfunction, spiral cable malfunction or air bag sensor assembly malfunction.
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