Diagnostic Instructions
DTC Descriptors
DTC B2907 01: Steering Column Lock Motor Enable Circuit Short to Battery
DTC B2907 06: Steering Column Lock Motor Enable Circuit Short to Ground or Open
Circuit/System Description
The steering column lock control module (SCLCM) receives an input from the body control module (BCM) on the steering column lock control circuit. When the BCM detects that the park switch is closed, and it goes to the off power mode, then
a low input is sent to the SCLCM. If the SCLCM detects a malfunction on the steering column lock control circuit, then DTC B2907 will set.
Conditions for Running the DTC
| • | DTCs B1327 or B1328 are not set as current. |
Conditions for Setting the DTC
The SCLCM detects a malfunction on the steering column lock control circuit
Actions Taken When DTC Sets
| • | The steering column may not lock or unlock. |
| • | DTC B2907 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
| • | Ground has been received on the steering column lock enable relay circuit for 300 ms, when the vehicle is in Park and the ignition is turned OFF. |
| • | A history DTC will clear after 50 consecutive ignition cycles if the condition for the malfunction is no longer present. |
Reference Information
Schematic Reference
Column Lock Schematics
Connector End View Reference
Description and Operation
Steering Wheel and Column Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References
Circuit/System Testing
- Verify that there are no DTCs in the BCM.
| ⇒ | If there are any DTCs in the BCM, diagnose those DTCs first. |
- Ignition ON. Monitor the Park Switch (Auto) in the BCM Keyless/Remote Start Data with a scan tool. Shift the transmission range selector in and out of Park. Verify that the scan tool display changes between Active and Inactive.
| ⇒ | If the Park Switch (Auto) does not change between Active and Inactive, test or repair the BCM park signal circuit. |
- Ignition ON. Monitor the Column Lock Relay Signal in the Chassis Data with a scan tool. Shift the vehicle into Park and turn off the ignition. Verify that the scan tool display changes from Off to On.
| ⇒ | If the BCM Column Lock Relay Signal does not change between OFF and ON, test or repair the steering column lock control circuit. |
| ⇒ | If the steering column lock control circuit is OK, test or replace the BCM. |
- If all circuits test normal, replace the SCLCM.
Repair Instructions
Perform the
Diagnostic Repair Verification
after completing the diagnostic procedure.
Control Module References
for SCLCM or BCM replacement and programming or setup
