B252E

DTC B252E

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 has overviews of all diagnostic categories.

DTC Descriptor

DTC B252E 00
Child Security Lock Switch Indicator Circuit Short to Ground

Diagnostic Fault Information







Circuit/System Description
The body control module (BCM) will provide a voltage and a ground for the child door lock indicator control circuit when the BCM receives a child door lockout command. The indicator will illuminate to indicate that the rear door latches have been disabled.

Conditions for Running the DTC
Battery voltage must be between 9-16 V.

Conditions for Setting the DTC
The DTC will set when the BCM detects a malfunction in the child security door lock switch signal circuit.

Action Taken When the DTC Sets
The indicator will be continuously illuminated.

Conditions for Clearing the DTC
- This 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

Connector End View Reference
Component Connector End Views

Description and Operation
Power Door Locks Description and Operation

Electrical Information Reference
- Circuit Testing
- Connector Repairs
- Testing for Intermittent Conditions and Poor Connections
- Wiring Repairs

Scan Tool Reference
Control Module References for information on diagnostic tools

Circuit/System Verification
Ignition ON, command the Child Security Lock Indicator ON and OFF with a scan tool. The child door lockout indicator should turn ON and OFF while changing between the commanded states.


Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the S48A Multifunction Switch - Instrument Panel.
2. Connect a test lamp between the control circuit terminal 2 and B+.
3. Ignition ON, command the Child Security Lock Indicator ON and OFF with a scan tool. The test lamp should turn ON and OFF while changing between the commanded states.
4. If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 Body Control Module.
5. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 Body Control Module.
6. If all circuits test normal, replace S48A Multifunction Switch - Instrument Panel.

Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
- Hazard Warning Switch Replacement
- Control Module References for BCM replacement, setup and programming.