GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2009 🢒 SRX 🢒 DTC 🢒 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

The passenger air bag ON/OFF indicators are used to notify the driver when the passenger presence system (PPS) has enabled or disabled the I/P inflator module. When the ignition is turned ON, the ignition voltage is supplied to the passenger air bag ON/OFF indicators and to the PPS module. The instrument panel cluster (IPC) grounds all indicator control circuits to the passenger air bag ON/OFF indicators for illumination. The IPC receives serial data messages from the supplemental inflatable restraints system to illuminate the indicators as necessary.

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

    • The vehicle was configured for passenger presence system (PPS) but the SDM does not detect that the PPS indicator is present due to loss of power at indicator.
    •  The vehicle is not configured for PPS and the SDM detects that the PPS indicator is present.

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 when DTC B1019 00 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.

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 DTC B1019 00 sets current, check for bent pins or shorting bars at the SDM connector.

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

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

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Testing

B1019 3A

  1. With a scan tool, verify DTC B1370 is not set as current in the SDM.
    2. ⇒If DTC is current refer to DTC B1370.
  2. If equipped with PPS, verify the appropriate PPS indicator segments illuminate by occupying and un-occupying the passenger seat.
    3. ⇒If the PPS indicator segments do not illuminate properly, refer to Passenger Presence System Indicator Circuit Malfunction.

B1019 00

  1. Ignition ON, verify the scan tool End Model Part Number is correct for the vehicle.
    2. ⇒If the part number is incorrect, reprogram the SDM.
  2. Observe the scan tool PPS Options parameter to determine how the vehicle PPS is currently configured in the SDM. Verify the actual vehicle equipment and the current configuration indicated by the scan tool parameter are the same.
    3. • If not equipped with PPS, the scan tool parameter should display Not Present and the PPS indicator should not be present on the vehicle
    • If equipped with PPS, the scan tool parameter should display Auto, Manual, or Auto + Man and the PPS indicator should be present on the vehicle
    ⇒If the original configuration does not match the actual vehicle equipment, reprogram the SDM with the correct configuration.
  3. Ignition OFF, disconnect the harness connectors at the SDM and verify the connector is in good condition and has no bent pins, terminals or shorting bars
    4. ⇒If damage is found, repair the bent pins, terminals or shorting bars as needed and perform the Setup New SDM procedure.
  4. Reconnect the harness connector at the SDM
  5. Ignition ON, verify the scan tool System Configuration matches the actual components installed on the vehicle.
    6. ⇒If the System Configuration does not match the actual components installed, reprogram the SDM with the correct components.
  6. Ignition ON, clear all PPS and SDM DTCs.
  7. Operate the vehicle within the Conditions for Running. Verify DTC B1019 does not reset.
    8. ⇒If DTC resets, replace 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