Inflatable Restraint Sensing and Diagnostic Module

DTC B1019

Diagnostic Instructions
- Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
- Review Strategy Based Diagnosis for an overview of the diagnostic approach.
- Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC B1019 00
System Configuration Error

Circuit/System Description
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.

Conditions for Running the DTC
Ignition voltage is between 9-16 V.

Conditions for Setting the DTC
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.

Action Taken When the DTC Sets
- The SDM requests the instrument cluster to illuminate the AIR BAG warning indicator.
- The DTC must be cleared before running the setup SDM.
- Air bag indicator will continue to flash until SDM setup procedure is complete.

Conditions for Clearing the DTC
- The condition for setting the DTC is no longer present.
- A history DTC will clear once 100 malfunction-free ignition cycles have occurred.

Diagnostic Aids
The SDM scan tool deployment loop and impact sensor data must 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.

Reference Information

Schematic Reference
- Seat Belt Schematics
- SIR Schematics

Connector End View Reference
Component Connector End Views

Description and Operation
- Seat Belt System Description and Operation
- SIR System Description and Operation

Electrical Information Reference
- Circuit Testing
- Testing for Intermittent Conditions and Poor Connections
- Connector Repairs
- Wiring Repairs

Scan Tool Reference
Control Module References for scan tool information

Circuit/System Verification

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. Ignition ON.
2. Verify no other SDM DTCs are set.
3. Diagnose those DTCs first. Refer to Diagnostic Trouble Code (DTC) List - Vehicle
4. With the scan tool observe the SDM impact sensor configuration scan tool data list. Verify the impact sensors called out in the scan tool data list match the number of actual impact sensors the vehicle is built with.
5. Verify the correct SDM calibration file is loaded in the SDM.
6. 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.
7. With the scan tool observe the SDM enabled deployment loop configuration scan tool data list. Verify the enabled deployment loops called out in the scan tool data list match the deployment loops the vehicle is built with.
8. Verify the correct SDM calibration file is loaded in the SDM.
9. If the SDM calibration file is correct, modify the vehicle to match the SDM enabled deployment loop calibration scan tool data list.
10. Replace the K36 SDM.

Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

- SIR/SRS Wiring Repairs
- Control Module References for SDM replacement, programming and setup