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

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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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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