GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2007 🢒 Lucerne 🢒 Safety and Security 🢒 Supplemental Inflatable Restraints 🢒 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 Descriptors

DTC B1019 00 : System Configuration Error

DTC B1019 3A: Incorrect Component Installed

Circuit/System Description

After the SDM is programmed, the SDM setup procedure is required. During this set up procedure, the SDM will compare the content that was just programmed to the actual components that are installed on the vehicle. If the SDM detects that there are too few or too many components on the system, DTC B1019 00 will set and not allow the setup procedure to complete.

Conditions for Running the DTC

Ignition voltage is between 9-16 volts.

Conditions for Setting the DTC

B1019 00

    • The SDM was programmed with the wrong options for the vehicle.
    • The wrong components were installed for the content of the vehicle.
    • SDM connector may have bent pins or shorting bars causing the SDM to learn deployment loops that are not actually present.

B1019 3A

A message has been sent to the SDM from the IPC that the PPS indicator has been disconnected. The IPC monitors the voltage of the low side of the seat belt reminder lamp on the PPS indicator and determines the indicator is plugged in if the voltage is below threshold.

Action Taken When the DTC Sets
    • The SDM commands AIR BAG indicator ON.
    • The SDM disables all deployments when B1019 00 DTC is set current, not for B1019 3A.

Conditions for Clearing the DTC
    • The correct SDM must be installed.
    • The correct components must be installed.
    • The PPS indicator operates as indicated in the SIR System Description and Operation and Seat Belt System Description and Operation .

Diagnostic Aids
    • If the SDM has been replaced, make sure that the correct part number was installed for this vehicle. If after programming the SDM and the B1019 00 sets current, check for bent pins or shorting bars at the SDM connector.
    • No voltage on the ignition 1 voltage circuit will also cause a DTC B1370.
    • AIRBAG indicator faults may set DTC B1019 3A.

Reference Information

Schematic Reference

    •  Seat Belt Schematics
    •  SIR Schematics

Description and Operation

    •  Seat Belt System Description and Operation
    •  SIR System Description and Operation

Electrical Information Reference

    •  Circuit Testing
    •  Connector Repairs
    •  Testing for Intermittent Conditions and Poor Connections
    •  Wiring Repairs

Circuit/System Testing

Important: If DTC B1001 or B1370 is set current, diagnose that DTC prior to following this diagnostic procedure.

B1019 3A

  1. If the vehicle is equipped with a PPS system, verify the PPS indicator is present.
    2. ⇒If not present, install the PPS status indicator
  2. Verify the PPS Indicator operates as indicated in the SIR System Description and Operation .
    3. ⇒If operation differs from that outlined in the Description and Operation, correct the fault in the PPS indicator circuit; refer to Passenger Presence System Indicator Circuit Malfunction or Seat Belt Indicator Circuit Malfunction - Passenger to correct the condition.

B1019 00

  1. Verify that the vehicle is equipped with all the SIR components it was configured for.
    2. ⇒Restore the vehicle to the original content and perform the Setup New SDM special function in the scan tool.
  2. Remove the SDM connector and verify the SDM connector is in good condition and has no bent pins, terminals or shorting bars.
    3. ⇒If damage is found, repair the bent pins, terminals or shorting bars as needed and then perform the Setup New SDM special function in the scan tool.
  3. Verify the correct SDM part number was installed.
    4. ⇒If wrong SDM was installed, replace SDM
  4. Verify the SDM was programmed with the correct software.
    5. ⇒If SDM was not programmed correctly, reprogram SDM. Use the Scan Tool to program the SDM.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

    •  SIR/SRS Wiring Repairs
    •  Control Module References for SDM or BCM replacement, setup, and programming