2010 Cadillac CTS Sedan AWD V6-3.6L Page 144
DTC B0073 01
- Right Front Seat Belt Sensor Circuit Short to Battery
DTC B0073 02
- Right Front Seat Belt Sensor Circuit Short to Ground
DTC B0073 04
- Right Front Seat Belt Sensor Circuit Open Circuit
DTC B0073 06
- Right Front Seat Belt Sensor Circuit Short To Ground or Open Circuit
DTC B0073 08
- Right Front Seat Belt Sensor Circuit Signal Invalid
Diagnostic Fault Information
Circuit/System Description
The seat belt buckle switch is located within the seat belt buckle assembly and provides an input to the inflatable restraint sensing and diagnostic
module (SDM). The SDM supplies a low reference circuit and a seat belt switch signal circuit to determine a buckled or unbuckled condition.
Conditions for Running the DTC
Ignition voltage is between 9-16 volts.
Conditions for Setting the DTC
B0072 01, B0073 01
The SDM detects the seat switch signal circuit is shorted to voltage for 500 milliseconds.
B0072 02, B0073 02
The SDM detects the seat switch signal circuit is shorted to ground for 500 milliseconds.
B0072 04, B0073 04
The SDM detects the seat switch signal circuit or low reference circuit is open for 500 milliseconds.
B0072 06, B0073 06
The SDM detects the seat switch signal circuit or low reference circuit is shorted to ground or is open for 500 milliseconds.
B0072 08, B0073 08
The SDM detects an invalid signal in the seat switch signal circuit.
Action Taken When the DTC Sets
The SDM commands the AIR BAG indicator ON.
Conditions for Clearing the DTC
* The conditions for setting the DTC no longer exists.
* A history DTC will clear once 100 malfunction-free ignition cycles have occurred.
Reference Information
Schematic Reference
Seat Belt Schematics (See: Diagrams/Electrical Diagrams/Seat Belt Systems)
Connector End View Reference
