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DTC 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 provides an overview of each diagnostic category.


DTC Descriptor

DTC B252E 02

Child Security Lock Switch Indicator Circuit Short To Ground

Diagnostic Fault Information

Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance
Child Security Indicator Control B252E 02 1 1 -
1. Child Security Indicator Inoperative


Circuit/System Description

The body control module (BCM) will provide 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

The system voltage is 9-16 V.

Conditions for Setting the DTC

The BCM has detected a short to ground on the child security lockout indicator control circuit for greater than 60 seconds.

Action Taken When the DTC Sets

The child lockout system will function normally but the child security lockout indicator will be continuously illuminated.

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

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 scan tool information

Circuit/System Verification

Ignition ON, observe the function of the child security lockout indicator while pressing and depressing the child lockout switch. The child security lockout indicator should turn ON and OFF each time the child lockout switch is pressed.

Circuit/System Testing


1. Ignition OFF, disconnect the X2 harness connector at the K9 BCM.

2. Ignition ON, verify that the child security lockout indicator is OFF.

3. If the child security lockout indicator is ON, test the control circuit terminal 6 for a short to ground. If the circuit tests normal, replace the A20 radio/HVAC control.

4. If all circuits test normal, replace the K9 BCM.


Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for BCM and HVAC control replacement, setup and programming