GM Service Manual Online
For 1990-2009 cars only

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: System Configuration Error

Circuit/System Description

When calibrating the liftgate position, the power liftgate control module (PLGM) is placed in a functional state to learn the liftgate travel limits. DTC B1019 will set automatically as an indicator that the system is in learn mode and not as a fault indicator. Once the travel limits are learned by the PLGM, the PLGM will exit calibration mode and DTC B1019 will go to history. If the PLGM does not exit learn mode, DTC B1019 will remain current and indicate a fault.

Conditions for Running the DTC

System voltage to the liftgate control module must be 9-16 volts.

Conditions for Setting the DTC

Whenever the liftgate control module is replaced or reprogrammed.

Conditions for Clearing the DTC

    • The DTC will be current until the liftgate calibration procedure has been completed.
    • When the calibration procedure has been completed the DTC will be a history status code.
    • A history DTC will clear after 50 ignition cycles or with a scan tool using the clear DTCs function.

Diagnostic Aids

A new or reprogrammed control module will be in a locked state and will require an ignition cycle before the calibration procedure can be performed.

Reference Information

Schematic Reference

Release Systems Schematics

Connector End View Reference

Vehicle Access Connector End Views

Description and Operation

Rear Hatch/Gate Description and Operation

Electrical Information Reference

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

Scan Tool Reference

    •  Scan Tool Data Definitions
    •  Scan Tool Data List
    •  Scan Tool Output Controls

Circuit/System Testing

Perform the Liftgate Calibration Procedure. The liftgate module should learn the travel limits, exit the calibration mode, and B1019 should go to history.

If the liftgate module does not exit learn mode after the calibration attempt, replace the liftgate module.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

    •  Liftgate Calibration Procedure
    •  Accessory and Liftgate Control Module Replacement