2010 Cadillac CTS Sedan AWD V6-3.6L Page 150
DTC B0079 01
- Driver Seat Position Sensor Circuit Short to Battery
DTC B0079 02
- Driver Seat Position Sensor Circuit Short to Ground
DTC B0079 04
- Driver Seat Position Sensor Circuit Open
DTC B0079 06
- Driver Seat Position Sensor Circuit Short to Ground or Open Circuit
DTC B0079 08
- Driver Seat Position Sensor Circuit Signal Invalid
Diagnostic Fault Information
Circuit/System Description
The seat position sensor is used to determine the proximity of a front driver seat position with respect to the inflatable restraint I/P module. The seat
position sensor is a hall effect sensor that is mounted on the seat track of the front driver seat. The seat position sensor is connected to the sensing
and diagnostic module (SDM) with a low reference and a signal circuit. The SDM uses the state of the seat position sensor to determine the need
for a stage 2 deployment of the inflatable restraint I/P module. When the seat is in the forward position stage 2 deployment is disabled, and when in
the rearward position stage 2 deployment is enabled. The SDM monitors the LF seat position sensor signal circuit and if a fault is detected, the
SDM will set DTC B0079 and defaults to disabling stage 2 inflatable restraint I/P module deployment.
Conditions for Running the DTC
Ignition voltage is between 9-16 volts.
Conditions for Setting the DTC
B0079 01
The SDM detects the LF seat position sensor signal circuit is shorted to voltage for 500 milliseconds.
B0079 02
The SDM detects the LF seat position sensor signal circuit is shorted to ground for 500 milliseconds.
B0079 04
The SDM detects the LF seat position sensor signal circuit is open for 500 milliseconds.
B0079 06
The SDM detects the LF seat position sensor signal circuit is shorted to ground or an open for 500 milliseconds.
B0079 08
The SDM detects an invalid signal on the LF seat position sensor signal circuit.
Action Taken When the DTC Sets
* The SDM defaults the seat position sensor to seat forward threshold.
* The SDM requests the instrument panel cluster (IPC) to illuminate the AIR BAG indicator.
Conditions for Clearing the DTC
* The condition for setting the DTC no longer exists.
* A history DTC will clear once 100 malfunction-free ignition cycles have occurred.
