Buick Regal: 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 monitors the number of safety components installed on the vehicle. When the ignition is turned ON, the inflatable restraint sensing and diagnostic module evaluates the number of safety components installed and compares it to the number of components the inflatable restraint sensing and diagnostic module expects to see on the vehicle with its current calibration. If there is a mismatch between detected components and the components programmed with the inflatable restraint sensing and diagnostic module calibration, DTC B1019 will set. The components (if equipped) that the inflatable restraint sensing and diagnostic module 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 inflatable restraint sensing and diagnostic module has not been completed and the inflatable restraint sensing and diagnostic module does not detect the passenger presence system (if equipped), the correct number of sensors, or deployment loops, that is expected with this calibration.

Action Taken When the DTC Sets

• The inflatable restraint sensing and diagnostic module requests the instrument cluster to illuminate the AIR BAG warning indicator.
• The DTC must be cleared before running the setup inflatable restraint sensing and diagnostic module.
• Air bag indicator will continue to flash until inflatable restraint sensing and diagnostic module 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 inflatable restraint sensing and diagnostic module scan tool deployment loop, impact sensor, and passenger presence (if equipped) data will match what the inflatable restraint sensing and diagnostic module 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, or if the passenger presence is not detected.

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 inflatable restraint sensing and diagnostic module.

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 inflatable restraint sensing and diagnostic module.

Reference Information

Schematic Reference

• Seat Belt Wiring Schematics
• SIR Wiring Schematics

Connector End View Reference

Component Connector End View Index

Description and Operation

• Seat Belt System Description and Operation
• Supplemental Inflatable Restraint System Description and Operation

Scan Tool Reference

Refer to Control Module References for scan tool information.

Circuit/System Verification

NOTE: DTC B1019 can set after the inflatable restraint sensing and diagnostic module 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 inflatable restraint sensing and diagnostic module will set DTC B1019.

1. Ignition ON.

2. Verify no other K36 Inflatable Restraint Sensing and Diagnostic Module DTCs are set.

• If other K36 Inflatable Restraint Sensing and Diagnostic Module DTCs are set

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

• Go to next step: If no other K36 Inflatable Restraint Sensing and Diagnostic Module DTCs are set

3. Verify the enabled impact sensors identified in the scan tool data list match the number of actual impact sensors installed on the vehicle.

• If the number of enabled impact sensors do not match

1. Verify the correct K36 Inflatable Restraint Sensing and Diagnostic Module calibration file is loaded in the K36 Inflatable Restraint Sensing and Diagnostic Module.
   • If the K36 Inflatable Restraint Sensing and Diagnostic Module calibration file is correct and the vehicle contains an incorrect number of sensors, identify which sensors are missing to make the vehicle match the K36 Inflatable Restraint Sensing and Diagnostic Module impact sensor calibration scan tool data list.
   • Go to next step: If the calibration file is incorrect
2. Reprogram the K36 Inflatable Restraint Sensing and Diagnostic Module. Refer to K36 Inflatable Restraint Sensing and Diagnostic Module: Programming and Setup

• Go to next step: If the number of enabled impact sensors match

4. Verify the enabled deployment loops identified in the scan tool data list match the deployment loops installed on the vehicle.

• If the number of enabled deployment loops do not match

1. Verify the correct K36 Inflatable Restraint Sensing and Diagnostic Module calibration file is loaded in the K36 Inflatable Restraint Sensing and Diagnostic Module.
   • If the K36 Inflatable Restraint Sensing and Diagnostic Module calibration file is correct and the vehicle contains an incorrect number of loops, identify which deployment loops are missing to make the vehicle match the K36 Inflatable Restraint Sensing and Diagnostic Module impact sensor calibration scan tool data list.
   • Go to next step: If the calibration file is incorrect
2. Program the K36 Inflatable Restraint Sensing and Diagnostic Module. Refer to K36 Inflatable Restraint Sensing and Diagnostic Module: Programming and Setup

• Go to next step: If the number of enabled deployment loops match

5. Verify a passenger presence system is equipped on the vehicle.

• If a passenger presence system is not equipped on the vehicle

Replace the K36 Inflatable Restraint Sensing and Diagnostic Module.

• Go to next step: If a passenger presence system is equipped on the vehicle

6. Verify the scan tool Passenger Presence System Enable Status parameter is Enabled.

• If the Passenger Presence System Enable Status parameter is not Enabled

Refer to K36 Inflatable Restraint Sensing and Diagnostic Module: Programming and Setup

• Go to next step: If the Passenger Presence System parameter is Enabled

7. Verify the scan tool Passenger Presence System Learn Status parameter is Learned.

• If the Passenger Presence System Learn Status parameter is not Learned

1. Verify the scan tool can communicate with the passenger presence system.
   • If the scan tool will not communicate with the passenger presence system, refer to Scan Tool Does Not Communicate with Low Speed GMLAN Device
   • Go to next step: If the scan tool communicates
2. Ignition OFF, disconnect the scan tool. It may take up to 2 min for all vehicle systems to power down. Ignition ON.
3. Verify DTC B1019 is not set as current.
   • If the DTC is set as current, refer to K36 Inflatable Restraint Sensing and Diagnostic Module: Programming and Setup
   • Go to next step: If the DTC is not set as current
4. All OK.

• Go to next step: If the Passenger Presence System Learn status is Learned

8. Replace the K36 Inflatable Restraint Sensing and Diagnostic Module.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Refer to Control Module References for module replacement, programming and setup.

Passenger Presence System Re-Zeroing

Introduction

The inflatable restraints passenger presence system is a calibrated system that requires re-zeroing or a zero check anytime the seat cushion trim attachments have been removed or the passenger presence system has been replaced. The procedures below are designed to assist in the re-zeroing of the passenger presence system. Before you start, read these procedures carefully and completely. For further information regarding the passenger presence system refer to Supplemental Inflatable Restraint System Description and Operation.

NOTE: The following procedures must be followed:

1. Read this procedure carefully and completely.

2. The passenger presence system will not function properly if the passenger presence system re-zeroing procedure is not performed.

3. Perform the Diagnostic Repair Verification after successfully completing the re-zeroing procedure to ensure the system is functioning properly.

Passenger Presence System Re-zeroing Procedure

NOTE:

• Before the passenger presence system can be re-zeroed the front passenger seat must be completely empty of all items. The presence of any liquid or items on the front passenger seat will affect the calibration and operation of the passenger presence system.
• DTC B0081 will set if the re-zero system test is performed with:
  • An aftermarket seat heater located too close to the sensor mat
  • A scan tool, laptop, or other electronic device is in the seat
  • The seat is damp or wet
  • An object or person is in the seat

1. Verify that the temperature is between 32ºF (0ºC) to 100ºF (38 ºC) before running a re-zero procedure.

2. Verify the seat is completely dry.

3. Empty the front outboard passenger seat.

4. Verify that all SIR and passenger presence system components, connectors, and connector position assurances are properly connected and mounted.

5. Install a scan tool.

6. Turn ON the ignition, with the engine OFF.

NOTE: The presence of current DTCs, except DTC B0081 11 or B0081 4B, will prevent the passenger presence system from re-zeroing and may set additional DTCs.

7. With a scan tool, perform the Passenger Presence Sensor Learn procedure.

8. If the test fails, confirm that the seat is empty and completely dry. Perform the Passenger Presence Sensor Learn test again. If the test fails again, verify DTC B0081 is not set as current, if the DTC is set refer to Diagnostic Trouble Code (DTC) List - Vehicle. If the test successfully completed, cycle the ignition OFF.

9. After the passenger presence system has been successfully re-zeroed, perform the Diagnostic Repair Verification.

SYMPTOMS - SIR

NOTE: Complete the following steps before using the symptom tables:

1. Perform Diagnostic System Check - Vehicle before using the symptom tables in order to verify that all of the following are true:
   • There are no DTCs set.
   • The inflatable restraint sensing and diagnostic module (SDM) can communicate via the serial data link.
2. Review the SIR system description and operation in order to familiarize yourself with the system functions. Refer to Supplemental Inflatable Restraint System Description and Operation.

Visual/Physical Inspection

• Inspect for aftermarket devices which could affect the operation of the SIR system.
• Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections.

Symptom List

Refer to Airbag Indicator Malfunction (Passenger) or Airbag Indicator Malfunction (Driver) in order to diagnose the symptom.

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