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.
Components of the System: BC1
The internal relays are activated based on inputs received by the BC1. The relays are activated on a time basis dependent upon battery voltage.
Polarity to the locking motors is reversed at the BC1 to drive them in both directions.
| BC1 Central Locking Relay Activation Time | ||||||||
|---|---|---|---|---|---|---|---|---|
| Battery Voltage (v) | < 9 | < 10 | < 11 | < 12 | < 13 | < 14 | < 15 | >15 |
| Relay On-Time (sec) | 1.0 | 0.85 | 0.7 | 0.6 | 0.5 | 0.45 | 0.4 | 0.4 |
Workshop Hint
Internal door lock relays are always driven for the maximum time based on battery voltage, except in the event of a sticking relay. If a sticking Relay is detected the BC1 will register a fault code and drive the companion relay so all outputs are at equal potential and the locking motor stops.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.
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