Renault Scenic 3 Chassis. Manual - part 44
37B
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3
AUTOMATIC PARKING BRAKE
Introduction
37B
The parking brake locks automatically when the engine
is switched off. It is automatically released when the ve-
hicle starts moving.
When performing a hill start, pressing the catch will im-
mobilise the vehicle on the gradient. The brake is re-
leased automatically when the torque required to move
the vehicle reaches the drive wheels. Nevertheless,
this function does not prevent engine stalling.
In the event of a fault in the main braking circuit when
driving, the automatic parking brake system offers a dy-
namic emergency braking system. It is also equipped
with a safety system preventing unwanted rear wheel
lock.
The catch is a manual control (1).
The gradient sensor (2) controls the brake lock accor-
ding to the angle of the gradient.
The force sensor (3) monitors and corrects the pressu-
re applied to the brakes.
The clutch pedal position sensor (4) informs the com-
puter of the slip point to create a reference curve.
The rear wheel speed sensors (5) are part of the anti-
lock braking system. They signal abnormal movement
of the vehicle when parking.
The control unit (6) contains the electric motor, the rear
brake cable attachments and the force and gradient
sensors.
The warning lights and symbol on the instrument panel
(7) indicate whether the automatic parking brake is ap-
plied, released or faulty.
The emergency (manual) parking brake cable control
allows the parking brake to be released in the event of
a battery fault.
The parking brake cable play compensation is set auto-
matically by the control unit.
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