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.
Conditions for Running the DTC
| • | DTCs B1327 or B1328 are not set as current. |
| • | The condition must be present for 300 ms. |
Conditions for Setting the DTC
This DTC will set if there is an open, short to ground, or short to voltage on the SCLCM unlock relay circuit.
Action Taken When the DTC Sets
| • | Stores a DTC B2510 in the SCLCM memory. |
| • | The SCLCM will command the Service Column Lock Now to turn ON in the DIC. |
Conditions for Clearing the MIL/DTC
| • | The SCLCM no longer detects a malfunction in the unlock relay circuit. |
| • | A history DTC will clear after 50 consecutive ignition cycles if the condition for the malfunction is no longer present. |
| • | Use a scan tool. |
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 |
2 |
Did you find any of these conditions? | -- | Go to Step 4 | Go to Step 3 |
3 | Inspect for poor connections at the harness connector of the steering column lock control module. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 6 | Go to Step 5 |
4 | Replace the steering wheel theft deterrent lock. Refer to Steering Column Electronic Lock Replacement . Did you complete the replacement? | -- | Go to Step 6 | -- |
5 |
Important: Always perform the setup procedure for the SCLCM. Refer to Control Module Setup .
Did you complete the replacement? | -- | Go to Step 6 | -- |
6 |
Does the DTC reset? | -- | Go to Step 2 | System OK |
