Volt

DTC B1019

The inflatable restraint sensing and diagnostic module (SDM) monitors the number of safety components installed on the vehicle. When the ignition is turned ON, the SDM evaluates the number of safety components installed and compares it to the number of components the SDM expects to see on the vehicle with its current calibration. If there is a mismatch between detected components and the components programmed with the SDM calibration, DTC B1019 will set. The components (if equipped) that the SDM will detect include inflatable restraint deployment loops, impact sensors, passenger presence system components, seat position sensors, disable switches, and seat belt switches.

Ignition voltage is between 9-16 V.

The setup for the SDM has not been completed and the SDM does not detect the correct number of sensors or deployment loops than is expected with this calibration.

The SDM scan tool deployment loop and impact sensor data will match what the SDM has been programmed to expect to see on the vehicle. B1019 DTC will set if a deployment loop or impact sensor is added or removed from the system.

DTC B1019 will set when an open/high resistance DTC sets for a deployment loop or impact sensor. This causes mismatch between the learned and actual components connected to the SDM.

DTC B1019 can set with no other DTCs if an unused deployment loop or impact sensor circuit is shorted to ground. This causes a mismatch between the learned and actual components connected to the SDM.

Schematic Reference

Connector End View Reference

Component Connector End Views

Description and Operation

Electrical Information Reference

Scan Tool Reference

Control Module References for scan tool information

Note: DTC B1019 can set after SDM has been replaced and/or reprogrammed before the setup procedure is completed. The setup procedure cannot be completed if DTC B1019 is set as current or history. If a short or open is detected in a deployment circuit prior to the setup procedure being performed the SDM will set DTC B1019.

1. Vehicle in Service Mode.
2. Verify no other SDM DTCs are set.

⇒	If other SDM DTCs are set

Diagnose those DTCs first. Refer to Diagnostic Trouble Code (DTC) List - Vehicle

⇓	If no other SDM DTCs are set

3. Observe the SDM impact sensor configuration scan tool data list using the scan tool. Verify that the impact sensors called out in the scan tool data list match the number of actual impact sensors the vehicle is built with.

⇒	If the number of impact sensors do not match

Verify the correct SDM calibration file is loaded in the SDM.

If the SDM calibration file is correct, the vehicle contains less/more sensors than it is supposed to. Modify the vehicle to match the SDM impact sensor calibration scan tool data list.

⇓	If the number of impact sensors match

4. Observe the SDM enabled deployment loop configuration scan tool data list using the scan tool. Verify that the enabled deployment loops called out in the scan tool data list match the deployment loops the vehicle is built with.

⇒	If the number of enabled deployment loops do not match

Verify the correct SDM calibration file is loaded in the SDM.

If the SDM calibration file is correct, modify the vehicle to match the SDM enabled deployment loop calibration scan tool data list.

⇓	If the number of enabled deployment loops match

5. Replace the K36 SDM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.