DTC B2515. Cadillac XLR 2008

For 1990-2009 cars only

Makes 🢒 Cadillac 🢒 2008 🢒 XLR 🢒 Driver Information and Entertainment 🢒 Cellular, Entertainment, and Navigation 🢒 DTC B2515

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 B2515: Steering Column Lock Solenoid/Motor Feedback Circuit

The steering column lock control module (SCLCM) controls the column lock motor using an internal lock relay, an internal unlock relay, and an internal lock enable relay. The lock and unlock relays provide a low input to the column lock motor. When the column needs to be locked the lock enable relay will energize the lock relay, which provides a high input to the lock side of the motor, energizing the motor to lock the steering column.

When the SCLCM receives the low input from the body control module (BCM) the internal lock enable relay is energized and provides a high input to the lock side of the column lock motor. The unlock side of the column lock motor is grounded through the internal unlock relay within the SCLCM. The column lock motor will send an input back to the SCLCM indicating the motor is energized for the locked position. This results in the locking of the steering column.

Conditions for Running the DTC

•	The ignition is ON.

•	DTCs B0005, B1000, B1327, B1328, or B2907 are not set as current.

Conditions for Setting the DTC

•	This DTC will set when the SCLCM checks for a valid feedback signal, but the feedback is not what was expected. This indicates a failure in the motor feedback switch/motor circuit.

•	The condition must occur 5 consecutive times for this DTC to set.

Actions Taken When the DTC Sets

•	DTC B2515 is stored in the SCLCM memory.

•	The SCLCM will command the driver information center (DIC) to display the Service Column Lock Now message.

Conditions for Clearing the DTC

•	The SCLCM no longer detects a malfunction in the motor feedback switch/motor circuit.

•	A history DTC will clear after 50 consecutive ignition cycles if the condition for the malfunction is no longer present.

Reference Information

Electrical Information Reference

•	Testing for Intermittent Conditions and Poor Connections

•	Circuit Testing

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Testing

Ignition OFF, steering wheel locked, disconnect the X2 connector at the SCLCM.
Test for 450-500 ohms between the steering column lock signal circuit terminal A and the ground circuit terminal B.

⇒	If outside the specified range, replace the steering wheel theft deterrent lock.

Reconnect the steering wheel theft deterrent lock.
Ignition ON, steering wheel unlocked, disconnect the X2 connector at the SCLCM.
Test for 250-350 ohms between the steering column lock signal circuit terminal A and the ground circuit terminal B.

⇒	If outside the specified range, replace the steering wheel theft deterrent lock.

Test for infinite resistance between the steering column unlock relay circuit terminal C and the signal circuit terminal A.

⇒	If less than the specified range, replace the steering wheel theft deterrent lock.

Test for infinite resistance between the steering column lock relay circuit terminal D and the signal circuit terminal A.

⇒	If less than the specified range, replace the steering wheel theft deterrent lock.

If all circuits test normal, replace the SCLCM.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

•	Steering Column Electronic Lock Replacement

•	Control Module References for SCLCM replacement, setup and programming