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.
104527
1
7
6
5
4
3
2
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4
AUTOMATIC PARKING BRAKE
Recommendations and safety issues
37B
On vehicles fitted with the automatic parking brake, the
RENAULT Card must be removed to prevent rapid dis-
charge of the battery and to prevent the system unloc-
king erratically.
The automatic parking brake can only be unlocked
when the steering column is unlocked.
When the vehicle exceeds the Maximum permissible
all-up weight, it is possible to obtain a tighter application
by holding the lever in the applied position for three se-
conds.
When parking in very cold conditions, it is advisable to
release the brake after switching off the engine and be-
fore removing the Renault card to prevent the rear
wheels from becoming locked by ice. The computer
can be configured in extreme cold mode. Extreme cold
mode inhibits the automatic application of the brake.
In vehicles fitted with an automatic gearbox, release is
no longer possible after five seconds:
- if the engine is working,
- if the automatic parking brake is applied,
- if a gear is engaged,
- and if the driver's door is open,
The system:
- triggers a buzzer,
- displays a message on the instrument panel, inhibits
the automatic parking brake release and requires the
gear lever to be shifted into the P or N position.
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5
AUTOMATIC PARKING BRAKE
Emergency handle
37B
REMOVAL
Remove the guard (1).
Remove the guard (1).
Pull out the handle and cable slightly, by a length
less than 2 cm.
Remove the handle.
REFITTING
Proceed in the reverse order to removal.
Equipment required
Diagnostic tool
STANDARD CHASSIS
104412
LONG CHASSIS
107507
1
1
22274
Note:
If you make a mistake with the lever (pull the
cable too far), carry out the following operations:
- with the ignition on, release the parking brake
(pull the catch and push the button).
- the automatic parking brake locking function is
indicated by a sound.
The play compensation is set automatically.
IMPORTANT
- Check that the brake cables are correctly fitted
in their housing.
- Carry out a complete check and clear the fault
generated using the Diagnostic tool.
37B
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6
AUTOMATIC PARKING BRAKE
Control unit
37B
The control unit is located at the right of the rear axle.
The control unit is located in the middle of the rear
axle.
REMOVAL
Mount the vehicle on a two post lift.
Disconnect the battery, starting with the negative ter-
minal.
Equipment required
Diagnostic tool
Tightening torques
m
support - body mounting
bolts
2.1 daNm
anchora g e s u p p o rt
mounting bolts
0.8 daNm
STANDARD CHASSIS
104401
LONG CHASSIS
107513
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