RENAULT TWINGO 2009 2.G Chasiss Workshop Manual

38C-12
ANTI-LOCK BRAKING SYSTEM
Hydraulic brake unit: Removal - Refitting
RIGHT-HAND DRIVE
38C
REMOVAL
I - REMOVAL PREPARATION OPERATION
aPosition the vehicle on a two-post lift (see Vehicle:
Towing and lifting) (02A, Lifting equipment).
aRemove the battery (see Battery: Removal - Refit-
ting) (80A, Battery).aRemove:
-the scuttle panel grille (see Scuttle panel grille:
Removal - Refitting) (56A, Exterior equipment),
-the battery tray (see Battery tray: Removal - Re-
fitting) (80A, Battery),
-the bolts (1) from the secondary brake fluid reser-
voir.
aMove aside the secondary brake fluid reservoir.
aRemove:
-the petrol injection computer (see Petrol injection
computer: Removal - Refitting) (17B, Petrol in-
jection),
-the computer mounting bolts,
-the computer bracket. Tightening torquesm
hydraulic unit bolts on
its inter mediate bracket8 Nm
hydraulic unit inter medi-
ate bracket bolts on the
main hydraulic unit
bracket8 Nm
hydraulic unit main
mounting bolts on the
body8 Nm
rigid brake pipe unions
on the hydraulic unit14 Nm
secondar y brake fluid
reservoir bolts8 Nm
123854
K4M

38C-13
ANTI-LOCK BRAKING SYSTEM
Hydraulic brake unit: Removal - Refitting
RIGHT-HAND DRIVE
38C
II - OPERATION FOR REMOVAL OF PART
CONCERNED
aDisconnect the braking hydraulic unit connector (2) .
aRemove the unions (3) of the rigid brake pipes on
the hydraulic unit.
aFit blanking plugs to the hydraulic unit.
aRemove:
-the bolts (4) from the hydraulic unit main bracket on
the body,
-the “hydraulic unit bracket - hydraulic unit” assem-
bly.
123855
WARNING
Prepare for the flow of fluid, and protect the sur-
rounding components.
123856
123869

38C-14
ANTI-LOCK BRAKING SYSTEM
Hydraulic brake unit: Removal - Refitting
RIGHT-HAND DRIVE
38C
aRemove:
-the hydraulic assembly intermediate bracket bolts
(5) ,
-the “hydraulic unit intermediate bracket - hydraulic
unit” assembly (6) from the main bracket,
-the hydraulic unit bolts (7) ,
-the hydraulic unit from its intermediate bracket.
REFITTING
I - REFITTING OPERATION FOR PART
CONCERNED
aRefit the hydraulic unit on its support.
aTorque tighten the hydraulic unit bolts on its inter-
mediate bracket (8 Nm).
aRefit the "hydraulic unit intermediate bracket - hy-
draulic unit" assembly on the main bracket.
aTorque tighten the hydraulic unit intermediate
bracket bolts on the main hydraulic unit bracket
(8 Nm).
aRefit the "hydraulic unit main bracket - hydraulic
brake unit" assembly on the body.
aTorque tighten the hydraulic unit main mounting
bolts on the body (8 Nm).
aRefit the rigid brake pipe unions on the hydraulic
unit.
aTorque tighten the rigid brake pipe unions on the
hydraulic unit (14 Nm).aConnect the braking hydraulic unit connector.
II - FINAL OPERATION.
aRefit:
-the computer bracket.
-the petrol injection computer (see Petrol injection
computer: Removal - Refitting) (17B, Petrol in-
jection).
aFit the secondary brake fluid reservoir.
aTorque tighten the secondary brake fluid reser-
voir bolts ( 8 Nm).
aRefit:
-the battery tray (see Battery tray: Removal - Re-
fitting) (80A, Battery),
-the scuttle panel grille (see Scuttle panel grille:
Removal - Refitting) (56A, Exterior equipment).
aRefit the battery (see Battery: Removal - Refitting)
(80A, Battery).
aBleed the brake circuit (see 30A, General informa-
tion, Braking circuit: Bleed, page 30A-4) .
121456
K4M

38C-15
ANTI-LOCK BRAKING SYSTEM
Front wheel speed sensor: Removal - Refitting
38C
REMOVAL
I - REMOVAL PREPARATION OPERATION
aPosition the vehicle on a two-post lift (see Vehicle:
Towing and lifting) (MR 411, 02A, Lifting equip-
ment).
aRemove the front wheel (see 35A, Wheels and ty-
res, Wheel: Removal - Refitting, page 35A-1) .
aRemove the clip (1) .
aLift part of the front wheel arch liner (2) .
aUnclip the pin (3) .II - OPERATION FOR REMOVAL OF PART
CONCERNED
aDisconnect the front wheel speed sensor cable con-
nector (4) .
aUnclip the front wheel speed sensor cable at (5) and
(6) . Tightening torquesm
front wheel speed sen-
sor bolt8 Nm
121479
121478
121477

38C-16
ANTI-LOCK BRAKING SYSTEM
Front wheel speed sensor: Removal - Refitting
38C
aRemove:
-the front wheel speed sensor bolt (7) ,
-the front wheel speed sensor.
REFITTING
I - REFITTING OPERATION FOR PART
CONCERNED
aRefit:
-the front wheel speed sensor,
-the front wheel speed sensor bolt.
aTorque tighten the front wheel speed sensor bolt
(8 Nm).
aConnect the front wheel speed sensor cable con-
nector.
aClip on the front wheel speed sensor cable.II - FINAL OPERATION.
aRefit the front wheel (see 35A, Wheels and tyres,
Wheel: Removal - Refitting, page 35A-1) .
121477
WARNING
To avoid damaging the wheel speed sensor
cable:
-Do not tension the cable,
-Do not twist the cable,
-Check that there is no contact with the sur-
rounding components,
-Do not use tools that may damage the cable.

38C-17
ANTI-LOCK BRAKING SYSTEM
Rear wheel speed sensor: Removal - Refitting
38C
REMOVAL
I - REMOVAL PREPARATION OPERATION
aPosition the vehicle on a two-post lift (see Vehicle:
Towing and lifting) (MR 411, 02A, Lifting equip-
ment).
aRemove the rear wheel (see 35A, Wheels and ty-
res, Wheel: Removal - Refitting, page 35A-1) .
II - OPERATION FOR REMOVAL OF PART
CONCERNED
aOpen the rear wheel speed sensor connector pro-
tection unit flap (1) .
aDisconnect the rear wheel speed sensor cable con-
nector (2) .aUnclip the rear wheel speed sensor cable at (3) and
(4) . Tightening torquesm
rear wheel speed sen-
sor bolt8 Nm
121476
121476

38C-18
ANTI-LOCK BRAKING SYSTEM
Rear wheel speed sensor: Removal - Refitting
38C
aRemove:
-the rear wheel speed sensor bolt (5) ,
-the rear wheel speed sensor.
REFITTING
I - REFITTING OPERATION FOR PART
CONCERNED
aRefit:
-the rear wheel speed sensor,
-the rear wheel speed sensor bolt.
aTorque tighten the rear wheel speed sensor bolt (8
Nm).
aClip on the rear wheel speed sensor cable.
aConnect the rear wheel speed sensor cable connec-
tor.II - FINAL OPERATION.
aClose the rear wheel speed sensor connector pro-
tection unit flap.
aRefit the rear wheel (see 35A, Wheels and tyres,
Wheel: Removal - Refitting, page 35A-1) .
121476
WARNING
To avoid damaging the wheel speed sensor
cable:
-Do not tension the cable,
-Do not twist the cable,
-Check that there is no contact with the sur-
rounding components,
-Do not use tools that may damage the cable.

38C-19
ANTI-LOCK BRAKING SYSTEM
Lateral acceleration and yaw sensor: Removal - Refitting
ELECTRONIC STABILITY PROGRAM
38C
REMOVAL
I - REMOVAL PREPARATION OPERATION
aPosition the vehicle on a two-post lift (see Vehicle:
Towing and lifting) (02A, Lifting equipment).
aRemove:
-the front passenger seat (see Complete front
seat: Removal - Refitting) (75A, Front seat
frames and runners),
-the passenger side front sill lining (see Front door
sill lining: Removal - Refitting) (71A, Body inter-
nal trim).
aRemove:
-the driver's seat (see Complete front seat: Re-
moval - Refitting) (75A, Front seat frames and
runners),
-the driver's side front sill lining (see Front door sill
lining: Removal - Refitting) (71A, Body internal
trim).aRemove the floor carpet (1) .
II - OPERATION FOR REMOVAL OF PART
CONCERNED
aDrill the rivets (2) of the protection plate (3) ,
aRemove the protection plate (3) .
aDisconnect the lateral acceleration and yaw sensor
connector (4) .
aRemove:
-the (5) lateral acceleration and yaw sensor nuts, Tightening torquesm
later al acceleration and
yaw sensor nuts8 Nm
LEFT-HAND DRIVE
RIGHT-HAND DRIVE
132469
132469

38C-20
ANTI-LOCK BRAKING SYSTEM
Lateral acceleration and yaw sensor: Removal - Refitting
ELECTRONIC STABILITY PROGRAM
38C
-the lateral acceleration and yaw sensor.
REFITTING
I - REFITTING OPERATION FOR PART
CONCERNED
aRefit the lateral acceleration yaw sensor.
aTorque tighten the lateral acceleration and yaw
sensor nuts (8 Nm ).
aConnect the lateral acceleration and yaw sensor
connector.
aRefit:
-the sensor protection plate,
-the rivets of the sensor protection plate.
II - FINAL OPERATION.
aRefit the floor carpet.
aRefit:
-the driver's side front sill lining (see Front door sill
lining: Removal - Refitting) (71A, Body internal
trim),
-the driver's seat (see Complete front seat: Re-
moval - Refitting) (75A, Front seat frames and
runners).
aRefit:
-the passenger side front sill lining (see Front door
sill lining: Removal - Refitting) (71A, Body inter-
nal trim),
-the front passenger seat (see Complete front
seat: Removal - Refitting) (75A, Front seat
frames and runners). RIGHT-HAND DRIVE
LEFT-HAND DRIVE

38C-21
ANTI-LOCK BRAKING SYSTEM
Braking computer: Removal - Refitting
38C
This repair method only relates to vehicles without
ESP, equipped with TEVES brand hydraulic unit.
REMOVAL
I - REMOVAL PREPARATION OPERATION
aPosition the vehicle on a two-post lift (see Vehicle:
Towing and lifting) (MR 411, 02A, Lifting equip-
ment).
aDisconnect the battery (see Battery: Removal - Re-
fitting) (MR 411, 80A, Battery).
aRemove the entire hydraulic unit (see 38C, Anti-
lock braking system, Hydraulic brake unit: Re-
moval - Refitting, page 38C-2) .II - OPERATION FOR REMOVAL OF PART
CONCERNED
aRemove:
-the braking computer bolts (1) on the hydraulic unit,
-the braking computer (2) .
REFITTING
I - REFITTING PREPARATION OPERATION
aDo not clean the pressure modulation unit (3) . Special tooling required
Mot. 1608Torque screwdriver 1 to 6.6
N.m.
Equipment required
Diagnostic tool
Tightening torquesm
braking computer bolts3 Nm
WARNING
Prepare for the flow of fluid, and protect the sur-
rounding components.
121457
19113