GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2007 🢒 Acadia - 2WD 🢒 Driver Information and Entertainment 🢒 Cellular, Entertainment, and Navigation 🢒 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 inflatable restraint sensing and diagnostic module (SDM) runs continuous diagnostic tests on the restraints system. If the SDM does not detect the passenger presence system (PPS) indicator or detects a fault in the PPS indicator circuit, DTC B1019 3A will set.

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 commands ON the AIR BAG warning lamp via serial data communications.
    • 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 .

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.

Reference Information

Electrical Information Reference

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

Circuit/System Testing

Important: If DTC B1001 is set current, diagnose that fault 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 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. Refer to Repair Instructions for programming procedure.

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