Vehicle Access

DTC B1023

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category.

DTC Descriptor
DTC B1023 00
- Integral Switch Performance

Circuit/System Description

The driver door module (DDM) and front passenger door module (PDM) each contain switches that control power door lock and window functions. The DDM also contains the control switch for the power outside rear view mirrors. These switches are integrated within the door control modules and are not serviceable as separate components. The DDM and PDM monitor these switch inputs for internal faults and set DTC B1023 00 if any are detected.

Conditions for Running the DTC

The system voltage is 9-18 volts.

Conditions for Setting the DTC

The DDM or PDM detects multiple or simultaneous inputs from a window or door lock switch.

Action Taken When the DTC Sets

The DDM or PDM ignores inputs from the malfunctioning switch.

Conditions for Clearing the DTC

* The DTC will be current for as long as the fault is present.
* When the fault is no longer present, the DTC will be a history DTC.
* A history DTC will clear after 50 ignition cycles.

Reference Information
Schematic Reference

Door Lock/Indicator Schematics (Except AXC or AXE) (Door Lock/Indicator Schematics (Except AXC or AXE))Door Lock/Indicator Schematics (AXC or AXE) (Door Lock/Indicator Schematics (AXC or AXE))
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

Power Door Locks Description and Operation (AXA) (Power Door Locks Description and Operation (AXA))Power Door Locks Description and Operation (AXC/AXE) (Power Door Locks Description and Operation (AXC/AXE))
Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

Scan Tool Reference

Control Module References (Programming and Relearning) for scan tool information

Circuit/System Verification

Clear all DTCs and operate the integrated switches at each door control module within the Conditions for Running the DTC. The DTC should not set.

If the DTC sets, replace the appropriate door module.

Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

* Door Lock and Side Window Switch Replacement - Driver Side (Outlook only with RPO AXA) (Service and Repair)Door Lock and Side Window Switch Replacement - Driver Side (Traverse with RPO AXE) (Door Lock and Side Window Switch Replacement - Driver Side)Door Lock and Side Window Switch Replacement - Driver Side (with RPO AXE or AXC) (Service and Repair)
* Door Lock and Side Window Switch Replacement - Passenger Side (Outlook with RPO AXA) (Service and Repair)Door Lock and Side Window Switch Replacement - Passenger Side (with RPO AXE or AXC) (Service and Repair)Door Lock and Side Window Switch Replacement - Passenger Side (Enclave with RPO AXE or AXC) (Service and Repair)
* Control Module References (Programming and Relearning) for DDM and PDM replacement, setup, and programming