Renault Scenic 3 Chassis. Manual — part 51
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17
ANTI-LOCK BRAKING SYSTEM
Hydraulic unit
F4R
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Remove:
- the distribution unit mounting bolts (12),
- the air distribution unit,
- the soundproofing screen mountings.
Remove the soundproofing screen.
Remove the lifting eye (13).
Remove the air conditioning pipe (see Evaporator -
dehydration canister).
Remove the ABS computer earth terminal mounting
bolt.
Disconnect the computer connector.
Unscrew the six hydraulic unit pipes.
Unclip the six pipes from the hydraulic unit.
Remove:
- the hydraulic unit support mounting bolts (14),
- the « hydraulic unit - support » assembly,
- the hydraulic unit - support mounting bolts,
- the hydraulic unit.
REFITTING
Proceed in the reverse order to removal.
102726
104324
AIR CONDITIONING or CLIMATE CONTROL
12
12
12
12
13
104341
WARNING
- Position the hydraulic unit earth ter minal wire
facing downwards to optimise the computer
connector sealing.
14
14
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18
ANTI-LOCK BRAKING SYSTEM
Hydraulic unit
F4R
38C
Refit the air conditioning pipe (see Evaporator - de-
hydration canister).
Torque tighten:
- the hydraulic unit support mounting bolts (0.65
daNm),
- the hydraulic unit - support mounting bolts (0.8
daNm),
- the bolts securing the pipes on the hydraulic
unit (1.4 daNm),
- the air distributor mounting bolts (0.9 daNm).
Bleed the braking circuit using the Diagnostic tool
(Section General Vehicle Information, Braking circuit
bleed, page 30A-5).
Fill up the refrigerant circuit using the filling station
tool.
106032
WARNING
Set up the earth terminal wires facing
downwards, to optimise the hydraulic unit compu-
ter connector sealing.
AIR CONDITIONING or CLIMATE CONTROL
WARNING
- When the ignition is switched on, the throttle
valve should run a minimum and maximum stop
programming cycle. Using the Diagnostic tool,
check that this programming has been executed
correctly.
- Connect the battery; carry out the necessary
programming (Section Electrical equipment).
AIR CONDITIONING or CLIMATE CONTROL
Note:
- Make sure the air conditioning is working pro-
perly with the fan assembly at top speed.
- If there is no cold air flow, look for leaks (see
Leak detection).
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19
ANTI-LOCK BRAKING SYSTEM
ABS with ESP: Description
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Pump assembly
The steering wheel angle sensor is built into the electric
power steering. This sensor cannot be removed.
103798
12
11
10
9
8
7
2
6
1
5
4
3
Reference
Type of connection
10
Multiplex network
11
Wire connection
12
Hydraulic connection
Reference
Description
Inputs
1
Braking pressure from master cylinder
2
Combined lateral acceleration and yaw sensor signal
3
Wheel speed sensor signal
4
Steering wheel angle sensor signal
5
Diagnostic socket
6
Supply (+ after ignition feed)
Outputs
7
Regulated braking pressure on wheel(s) concerned
8
Diagnostic socket
9
Anti-skid and electronic stability program deactivation push button
Note:
Two types of pump assemblies are fitted, either ABS
or ABS - ESP. The ABS computer has 26 tracks.
The ABS - ESP computer has 46 tracks.
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20
ANTI-LOCK BRAKING SYSTEM
Yaw speed and lateral acceleration sensor
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REMOVAL
Disconnect the battery, starting with the negative ter-
minal.
Unclip the rack frame.
Remove the rack by pressing on the clip (1) with a
flathead screwdriver.
Disconnect the lateral acceleration and yaw sensor
connector.
Remove:
- the sensor mounting nuts,
- the sensor.
Equipment required
Diagnostic tool
Tightening torques
m
lateral acceleration and
yaw sensor mounting
nuts
0.8 daN
103596
103597
WARNING
- Handle this sensor with care.
1
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