Diagnostic Instructions
DTC Descriptor
DTC B1001 00: SDM Option Configuration Error
Circuit/System Description
The inflatable restraint sensing and diagnostic module (SDM) stores the vehicles restraint ID from the vehicle identification number (VIN) and the last 4 digits of the SDM part number. When the ignition is turned ON, the SDM compares this information
to the information stored in the body control module (BCM) over the GMLAN communication circuit. If there is a mismatch between the information stored in the SDM and BCM, DTC B1001 will set.
Conditions for Running the DTC
Ignition voltage is between 9-16 volts.
Conditions for Setting the DTC
B1001 00
| • | The last 4 digits of the SDM part number does not match the last 4 digits stored in the BCM. |
| • | The VIN stored in the BCM does not match that of the vehicle. |
Action Taken When the DTC Sets
| • | The SDM requests the instrument panel cluster (IPC) to illuminate the AIR BAG indicator. |
| • | The SDM disables all deployments. |
Conditions for Clearing the DTC
| • | The last 4 digits of the SDM part number match the last 4 digits stored in the BCM. |
| • | The restraints ID that is stored in the SDM matches the restraints ID that is stored in the BCM. |
Diagnostic Aids
This DTC is an indication that an incorrect SDM is installed in the vehicle, or that the SDM and/or the BCM was replaced without reprogramming the BCM with the new information.
Reference Information
Schematic Reference
SIR Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
SIR System Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Important: When removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected.
- Ignition ON, verify the scan tool Secondary Key Status displays Valid.
| ⇒ | If not the specified value, verify the scan tool Received VIN Digits 2-7 match the vehicle VIN , if the VIN does not match, reprogram the BCM. If the VIN matches, reprogram the SDM. |
- Ignition ON, verify the scan tool Primary Key Status displays Valid.
| ⇒ | If not the specified value, verify the scan tool SDM Primary Key matches the Received Primary Key, if the key does not match, perform the Setup SDM Primary Key in BCM procedure. |
- With a scan tool, verify DTC B1001 is not set as current.
| ⇒ | If DTC is set as current, replace the SDM. |
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic procedure.
