Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Steering Column Lock Description
The BCM provides the steering column control function which allows the column to be electronically locked or unlocked. The BCM provides three outputs, steering column lock, steering column unlock, and the external steering column lock relay. The BCM can apply a ground or battery output on the steering column lock circuit or steering column unlock circuit depending on the desired steering column lock motor position. The BCM accomplishes steering column lock motor operation based on the following output commands:
| Steering Column Unlock | Steering Column Lock | Steering Column Lock Motor Operation |
|---|---|---|
| GROUND | GROUND | NONE |
| GROUND | BATTERY | UNLOCK |
| BATTERY | GROUND | LOCK |
| BATTERY | BATTERY | NONE |
The BCM controls the position of the steering column lock motor based on the following input information:
- Ignition position
- Key in Ignition status
- Key Out of Ignition status
- Steering column lock feedback switch
- PASS-Key® system
- PCM password information
- System voltage
The external steering column lock relay is located above the BCM, in the passenger footwell area. The external steering column lock relay can be identified by 2 orange wires connected to it. There may be either 2 or 3 relays in this area, and they may not always be in the same position.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.