GM Service Manual Online
For 1990-2009 cars only

Sensing Diagnostic Module (SDM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ON, Engine OFF, Seat Belt Buckled

Driver Seat Belt Type

Sensor Data

Switch/Sensor

Switch

Psgr. Seat Belt Type

Sensor Data

Switch/Sensor

Switch

Driver Seat Belt Switch

Sensor Data

Buckled/Unbuckled

Buckled

Passenger Seat Belt Switch

Sensor Data

Buckled/Unbuckled

Unbuckled

Passenger Seat Belt Sensor

Sensor Data

mA

9 mA