Service Information

Volt

DTC B1023

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 B1023 00: Integral Switch Malfunction

The vehicle theft deterrent subsystem provides the capability to lock or unlock the steering electrically. The steering column lock control module is allowed to unlock when power mode transitions to a non off power mode and an authenticated driver identification device is present. Once the column is unlocked, a crank request can be allowed.

Conditions for Running the DTC

•	The ignition is in OFF, ACCESSORY or RUN position.

•	The system voltage is between 9–16 V.

Conditions for Setting the DTC

The steering column lock control module detects an internal sensor malfunction resulting in lock status of invalid to be transmitted on serial data.

Action Taken When the DTC Sets

•	DTC B1023 is stored in memory.

•	The driver information centre displays the service column lock system warning message.

•	The steering column lock indicator is ON.

Conditions for Clearing the DTC

•	No steering column lock control module internal sensor malfunction so lock status of valid is transmitted on serial data.

•	The condition for setting the DTC is no longer present.

Reference Information

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

Clear all DTCs and operate the integral switch at the steering column lock within the conditions for running the DTC. The DTC should not set.

⇒	If the DTC sets, replace the K60 Steering Column Lock Control Module.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for steering column lock control module replacement, setup and programming