Circuit Description
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.
DTC Descriptor
This diagnostic supports the following DTC:
DTC B2515 Steering Column Lock Solenoid/Motor Feedback Circuit
Conditions for Running the DTC
| • | DTCs B0005, B1000, B1327, B1328, or B2907 are not set as current. |
| • | The condition must be present for 300 ms. |
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. |
Action Taken When the DTC Sets
| • | Stores a DTC B2515 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 MIL/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. |
Test Description
The numbers below refer to the step numbers on the diagnostic table.
-
During the steering column electronic lock operation, listen for an audible click. Repeat the commands as necessary.
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This test determines if the steering column electronic lock feedback circuit is operating properly.
Step | Action | Values | Yes | No |
|---|---|---|---|---|
Schematic Reference: Column/Ignition Lock Schematics Connector End View Reference: Steering Wheel and Column Connector End Views | ||||
1 | Did you perform the Diagnostic System Check - Vehicle? | -- | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
Does the column lock with each cycle of the ignition? | -- | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 | |
Does the resistance measure within the specification? | 492-482 ohms | Go to Step 5 | Go to Step 4 | |
4 | Test the steering column lock signal circuit for an open, a short to ground, or short to voltage. Refer to Circuit Testing in Wiring Systems. Did you find the condition? | -- | Go to Step 8 | Go to Step 6 |
5 | Inspect for poor connections at the harness connector of the steering column lock control module (SCLCM). Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 8 | Go to Step 7 |
6 | Replace the steering wheel theft deterrent lock. Refer to Steering Column Electronic Lock Replacement . Did you complete the replacement? | -- | Go to Step 8 | -- |
7 |
Important: Perform the setup procedure for the SCLCM.
Did you complete the replacement? | -- | Go to Step 8 | -- |
8 |
Does DTC 2515 reset? | -- | Go to Step 2 | System OK |
