2007 RENAULT SCENIC ABS

38C-70
MR-372-J84-38C050$930_eng.mif
V2
ANTI-LOCK BRAKING SYSTEM
Diagnostic - Fault finding chart38C
ALP 2 Locking of one or more wheels
NOTESOnly consult this customer complaint after a complete check with the diagnostic tool.
Reminder: wheel lock on a vehicle equipped with ABS, or tyre squealing perceived by the customer as locking,
may be part of the normal operation of the system and should not be automatically considered as faults:
–Braking with ABS on very poor roads (significant squealing).
However, if the wheels are actually locking, raise the vehicle in order to be able to turn the wheels and check:
–Possible inversion when connecting the speed sensors.
Using parameters PR001, PR002, PR003 and PR004, rotate the wheels slowly and check the consistency of the
results obtained.
If the value measured is zero, rotate the other wheels to confirm an electrical inversion of the sensors and repair
the wiring harness.
–Possible inversion of pipes on the hydraulic unit.
Use commands AC003 Front left-hand wheel solenoid valves, AC004 Front right-hand wheel solenoid
valves, AC005 Rear left-hand wheel solenoid valves and AC006 Rear right-hand wheel solenoid valves
while depressing the brake pedal and check for the occurrence of 5 locking/unlocking cycles on the wheel
concerned (see Dealing with commands). If the 5 cycles do not occur on the wheel tested (wheel remains
locked), check whether they occur on another wheel to confirm transposed pipes.
If the 5 cycles are not detected on a wheel and the pipes have not been subject to inversion, replace the hydraulic
unit.
Check that the sensor casing is secured when rotating.
Check the quality of the mounting of the wheel speed sensor (correct clipping without excessive play).
Check the conformity of the targets using special command SC001 "Check target teeth": condition, number of
teeth = 48.
If the fault is still present after these checks, contact the Techline.
AFTER REPAIRClear the computer fault memory.
Carry out a road test followed by another check with the diagnostic tool.
ESPBOSCH_V08_ALP02 /ESPBOSCH_V09_ALP02/ESPBOSCH_V0A_ALP02/
ESPBOSCH_V0B_ALP02 /ESPBOSCH_V11_ALP02/ESPBOSCH_V12_ALP02BOSCH 8.0 ESP
Vdiag No.: 08, 09, 0A,
0B, 11, 12

38C-71
MR-372-J84-38C050$930_eng.mif
V2
ANTI-LOCK BRAKING SYSTEM
Diagnostic - Fault finding chart38C
ALP 3 Pull
NOTESOnly consult this customer complaint after a complete check with the diagnostic tool.
Disconnect one wheel speed sensor. Start the
engine and check that only the ABS fault warning
light comes on. Do not drive the vehicle if the brake
fault warning light is also lit, as the brake limiter
function is no longer guaranteed to operate
correctly. Carry out a road test with the ABS
deactivated.
Is the fault still present under these conditions?
no
Raise the vehicle so that you can rotate the wheels
and check:
–Possible inversion when connecting the speed
sensors.
–Possible inversion of pipes on the hydraulic unit.
To carry out these two tests, refer to and follow the
procedures given in ALP 2.
Check the condition of the ABS targets and that they
conform to specifications.
Also check the sensor/target air gap over one
revolution of each front and rear wheel.
If the fault is still present, contact the Techline.
yesIf the brake pedal travel is relatively long,
bleed the brake circuit.
If the travel is normal, check the tyre
pressures, the front axle, or for any leaks
in the circuit.
AFTER REPAIRClear the computer fault memory.
Carry out a road test followed by another check with the diagnostic tool.
ESPBOSCH_V08_ALP03 /ESPBOSCH_V09_ALP03/ESPBOSCH_V0A_ALP03/
ESPBOSCH_V0B_ALP03 /ESPBOSCH_V11_ALP03/ESPBOSCH_V12_ALP03BOSCH 8.0 ESP
Vdiag No.: 08, 09, 0A,
0B, 11, 12

38C-72
MR-372-J84-38C050$930_eng.mif
V2
ANTI-LOCK BRAKING SYSTEM
Diagnostic - Fault finding chart38C
ALP 4 Drift
NOTESOnly consult this customer complaint after a complete check with the diagnostic tool.
Disconnect one wheel speed sensor. Start the
engine and check that only the ABS fault warning
light comes on. Do not drive the vehicle if the brake
fault warning light is also lit, as the brake limiter
function is no longer guaranteed to operate
correctly. Carry out a road test with the ABS
deactivated.
Is the fault still present under these conditions?
no
Normal behaviour linked to the system operation
during the regulation phase, mainly on surfaces with
uneven grip or which are poorly laid.
yesRoad handling fault not connected with
the ABS.
Check the condition of the brake linings
and that they are to specification and
check the tyre pressures, the front axle,
etc.
AFTER REPAIRClear the computer fault memory.
Carry out a road test followed by another check with the diagnostic tool.
ESPBOSCH_V08_ALP04 /ESPBOSCH_V09_ALP04/ESPBOSCH_V0A_ALP04/
ESPBOSCH_V0B_ALP04 /ESPBOSCH_V11_ALP04/ESPBOSCH_V12_ALP04
BOSCH 8.0 ESP
Vdiag No.: 08, 09, 0A,
0B, 11, 12

38C-73
MR-372-J84-38C050$930_eng.mif
V2
ANTI-LOCK BRAKING SYSTEM
Diagnostic - Fault finding chart38C
ALP 5Unexpected ABS operation at low speed and with slight
pedal pressure
NOTESOnly consult this customer complaint after a complete check with the diagnostic tool.
Important: ABS regulation may be unresponsive when the vehicle is driven on surfaces
such as icy roads, cobbled streets, etc.
It is possible to feel brake pedal vibrations which are associated with the reaction of the system in particular
circumstances, such as:
–crossing rumble strips,
–tight cornering with lifting of the inside rear wheel.
These vibrations may be linked to simple brake limiter activation, when the pressure on the rear axle is limited.
If the fault is different, check the speed sensor connectors (micro-breaks) as well as the air gaps.
AFTER REPAIRClear the computer fault memory.
Carry out a road test followed by another check with the diagnostic tool.
ESPBOSCH_V08_ALP05 /ESPBOSCH_V09_ALP05/ESPBOSCH_V0A_ALP05/
ESPBOSCH_V0B_ALP05 /ESPBOSCH_V11_ALP05/ESPBOSCH_V12_ALP05BOSCH 8.0 ESP
Vdiag No.: 08, 09, 0A,
0B, 11, 12

38C-74
MR-372-J84-38C050$930_eng.mif
V2
ANTI-LOCK BRAKING SYSTEM
Diagnostic - Fault finding chart38C
ALP 6 Unexpected ABS system intervention on a poor road surface
NOTESOnly consult this customer complaint after a complete check with the diagnostic tool.
On poor road surfaces it is normal to feel bucking and vibration of the pedal as well as more significant tyre
squealing than on good surfaces.
This gives the impression of a variation in efficiency, but this should be considered normal.
AFTER REPAIRClear the computer fault memory.
Carry out a road test followed by another check with the diagnostic tool.
ESPBOSCH_V08_ALP06 /ESPBOSCH_V09_ALP06/ESPBOSCH_V0A_ALP06/
ESPBOSCH_V0B_ALP06 /ESPBOSCH_V11_ALP06/ESPBOSCH_V12_ALP06BOSCH 8.0 ESP
Vdiag No.: 08, 09, 0A,
0B, 11, 12

38C-75
MR-372-J84-38C050$930_eng.mif
V2
ANTI-LOCK BRAKING SYSTEM
Diagnostic - Fault finding chart38C
ALP 7Unexpected ABS operation when using special equipment
(car phone, CB, etc.)
NOTESOnly consult this customer complaint after a complete check with the diagnostic tool.
Check that the equipment which is causing the fault is approved.
Check that this equipment has been correctly installed without modification to the original wiring, in particular, that
of the ABS system (connections to earth and + after ignition/before ignition of the ABS are not permitted).
AFTER REPAIRClear the computer fault memory.
Carry out a road test followed by another check with the diagnostic tool.
ESPBOSCH_V08_ALP07 /ESPBOSCH_V09_ALP07/ESPBOSCH_V0A_ALP07/
ESPBOSCH_V0B_ALP07 /ESPBOSCH_V11_ALP07/ESPBOSCH_V12_ALP07BOSCH 8.0 ESP
Vdiag No.: 08, 09, 0A,
0B, 11, 12

38C-76
MR-372-J84-38C050$930_eng.mif
V2
ANTI-LOCK BRAKING SYSTEM
Diagnostic - Fault finding chart38C
ALP 8Lengthening of the brake pedal travel following a regulation
phase (with an irregular pedal when entering the
regulation phase)
NOTESOnly consult this customer complaint after a complete check with the diagnostic tool.
Air transit from the hydraulic unit regulation channels to the brake circuits.
Bleed the circuits, following the procedure using the diagnostic tool commands (see Command mode
procedures).
Following the operation, carry out a road test with ABS regulation.
If the fault is still present, carry out the above operation again 1 or 2 times.
If the customer complaint is particularly pronounced, and the bleeding procedures have not rectified it, contact the
Techline.
AFTER REPAIRClear the computer fault memory.
Carry out a road test followed by another check with the diagnostic tool.
ESPBOSCH_V08_ALP08 /ESPBOSCH_V09_ALP08/ESPBOSCH_V0A_ALP08/
ESPBOSCH_V0B_ALP08 /ESPBOSCH_V11_ALP08/ESPBOSCH_V12_ALP08BOSCH 8.0 ESP
Vdiag No.: 08, 09, 0A,
0B, 11, 12

38C-78
MR-372-J84-38C050$930_eng.mif
V2
ANTI-LOCK BRAKING SYSTEM
Diagnostic - Fault finding chart38C
ALP 10 Brake pedal vibration
NOTESOnly consult this customer complaint after a complete check with the diagnostic tool.
Normal reaction of the brake pedal during ABS regulation or of limitation of pressure on the rear axle
(brake limiter function).
AFTER REPAIRClear the computer fault memory.
Carry out a road test followed by another check with the diagnostic tool.
ESPBOSCH_V08_ALP10 /ESPBOSCH_V09_ALP10/ESPBOSCH_V0A_ALP10/
ESPBOSCH_V0B_ALP10 /ESPBOSCH_V11_ALP10/ESPBOSCH_V12_ALP10BOSCH 8.0 ESP
Vdiag No.: 08, 09, 0A,
0B, 11, 12