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.
Activating/Deactivating The Parking Brake When Moving
It is possible to activate the parking brake while moving, that is to say at speeds exceeding 3 km/h. But this is an emergency function which must only be used when the normal brakes are not functioning.
A condition is that switch parking brake (3/272) is activated during the whole sequence. The ABS-function is used to obtain safe braking.
A sound signal is heard when the parking brake is activated when driving.
When activating the parking brake when moving the Park Brake Module (PBM) (4/115) will transmit a request, to the brake control module (BCM) (4/16) via the CAN network, to brake the vehicle using the ABS function. When the speed is less than 3 km/h the park brake module (PBM) will take over the braking by activating the electric motor in the brake calipers (6/146-147).
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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