Conditions for Setting the DTC
WARNING: This page is about a different car, the 2011 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
B0073 01
The SDM detects the seat switch signal circuit or low reference circuit is shorted to voltage for 500 milliseconds.
B0073 02
The SDM detects the seat switch signal circuit or low reference circuit is shorted to ground for 500 milliseconds.
B0073 04
The SDM detects the seat switch signal circuit or low reference circuit is open for 500 milliseconds.
B0073 06
The SDM detects the seat switch signal circuit or low reference circuit is shorted to ground or an open for 500 milliseconds.
B0073 08
The SDM detects an invalid signal in the seat switch signal circuit.