wheel RENAULT SCENIC 2007 J84 / 2.G Anti Lock Braking System Bosch 8.0 ABS Workshop Manual

ANTI-LOCK BRAKING SYSTEM
Fault finding - System operation
38C
38C - 7V2 MR-372-J84-38C000$132_eng.mif
BOSCH ABS 8.0
Vdiag No.: 0C, 0D, 0E, 0FANTI-LOCK BRAKING SYSTEM
Fault finding - System operation
The main functions of ABS on this vehicle are the electronic balancing of front and rear braking by controlling rear
wheel slip and preventing the brakes from locking by controlling the slipping of all four wheels.
The system also supplies the other computers with information on the vehicle speed via a wire connection for the
discharge bulbs, the radio and the electric sunroof, and via the multiplex network for the other computers. The ABS
computer supplies the multiplex network with the odometry for the instrument panel and navigation system. If heavy
braking produces very rapid deceleration, the ABS computer sends out a request to the UCH via the multiplex network
to ask it to switch on the hazard warning lights (depending on the law in the relevant country).
Fault finding warning light illumination strategy for Mégane II ph1 and Scénic II ph 1
Instrument panel warning lightInstrument panel message
Meaning
MEGANE II SCENIC II
Brake faultsABS SERVICE STOPNo message"Brake
fault"Electronic brake
distribution and ABS
functions inoperative.
ABS SERVICENo messageCheck the
ABSABS function
inoperative.
Brake faults
flashing at
2 HzABS flashing
at 2 HzNo messageNo
messageABS computer is in
fault finding mode.
ABS flashing
at 8 HzNo messageNo
messageTachometric index not
programmed.
NOTE:
The STOP warning light is always accompanied by a single audible warning (1 beep).
ABS 8.0X84 4.0
MR-372-J84-38C000$132_eng.mif

ANTI-LOCK BRAKING SYSTEM
Fault finding - Configurations and programming38C
38C - 10V2 MR-372-J84-38C000$264_eng.mif
BOSCH ABS 8.0
Vdiag No.: 0C, 0D, 0E, 0FANTI-LOCK BRAKING SYSTEM
Fault finding - Configurations and programming
Settings
VP001: Write VIN.
This command allows the vehicle identification number to be entered into the computer. Use this
command each time the computer is replaced. The VIN number (VF...) can be found on the
manufacturer's plate on the front right-hand door pillar and on the body panel under the left-hand side
of the windscreen.
VP004: Vehicle parameters.
This command is used to configure the engine type + braking definition + body type.
Select command VP004 on the diagnostic tool (it is imperative to check that the variants selected
correspond to the vehicle type).
VP006: Write date of the last After-Sales service.
Whenever the ABS system is worked on in the shop, the date must be entered.
Select command VP006 on the diagnostic tool.
Enter the operation date with the tool keyboard.
VP007: Tachometric index.
This command is used to program the computer memory with the index required to calculate vehicle
speed from the speed at which the wheels turn.
The BOSCH ABS 8.0 computer supplies the vehicle speed signal to all vehicle systems that use this
information (instrument panel, engine management, etc.). This vehicle speed signal replaces the one
supplied by the speed sensor located on the gearbox. The ABS computer calculates the vehicle speed
from the speed of the wheels and the circumference of the tyres fitted on the vehicle.
Note:
The vehicle speed is sent by wire (track 23) to the xenon bulb computer, radio and electric sunroof, and
via the multiplex network to the other computers.
The tyre circumference must be programmed into the memory of a new computer. This consists
of entering a number X using the VP007 "Tachometric index" command on the diagnostic tool.
Once the number has been entered using the VP007 command, delete the fault in the computer memory
and then switch off the ignition. Use the parameter PR030 to check that the index entered has been
stored correctly.
VP032: Vehicle speed at initialisation.
Vehicle speed transmitted via the multiplex network when the computer is initialised.
Select "Type 1" or "Type 2" according to the information supplied by the tool.
ABS 8.0X84 4.0
MR-372-J84-38C000$264_eng.mif

ANTI-LOCK BRAKING SYSTEM
Fault finding - Fault summary table38C
38C - 11V2 MR-372-J84-38C000$330_eng.mif
BOSCH ABS 8.0
Vdiag No.: 0C, 0D, 0E, 0FANTI-LOCK BRAKING SYSTEM
Fault finding - Fault summary table
Tool fault Associated DTC Diagnostic tool title
DF001 50CCComputer supply
DF006 501FFront left-hand wheel speed sensor circuit
DF007 503FRear left-hand wheel speed sensor circuit
DF017 50C3Computer
DF020 50C3Tachometric index programming
DF026 500FFront right-hand wheel speed sensor circuit
DF027 502FRear right-hand wheel speed sensor circuit
DF055 50C3Vehicle parameter programming
DF063 5046Wheel speed inconsistency
DF066 5180No injection multiplex signal
DF090 5041Front right-hand wheel target
DF091 5042Front left-hand wheel target
DF092 5043Rear right-hand wheel target
DF093 5044Rear left-hand wheel target
DF152 50E6Multiplex network
DF153 50C3Multiplex network
DF186 5182No instrument panel multiplex signal
DF188 50C6Brake switch circuit
DF193 5180Invalid injection multiplex signals
ABS 8.0X84 4.0
MR-372-J84-38C000$330_eng.mif

ANTI-LOCK BRAKING SYSTEM
Fault finding - Interpretation of faults
38C
38C - 13V2 MR-372-J84-38C000$396_eng.mif
BOSCH ABS 8.0
Vdiag No.: 0C, 0D
DF006
PRESENT
OR
STOREDLEFT-HAND FRONT WHEEL SPEED SENSOR CIRCUIT
CO.0 : Open circuit or short circuit to earth
1.DEF : Magnetic/mechanical target fault
Vdiag No.: 0C, 0D
NOTESSpecial notes:
The wheel speed sensors are fed with + 12 V APC but this feed cannot be measured
on Vdiag 0C and 0D (feed cut off when the sensor is faulty).
Conditions for applying the fault finding procedure to stored faults:
The fault is declared present following a road test at a speed of > 36 mph (60 km/h).
CO.0
NOTESNone
Check the connection and the condition of the sensor connectors.
Swap the two front wheel speed sensors over.
Clear the computer fault memory.
Carry out a road test followed by another check with the diagnostic tool.
If the fault initially declared DF006 "Front left-hand wheel speed sensor circuit" becomes DF026 "Front
right-hand wheel speed sensor circuit", replace the wheel speed sensor.
If the fault remains on the same side, the wiring between the computer and the sensor is faulty.
Check the connection and the condition of the computer connectors. Repair if necessary.
Check and ensure the continuity of the following connections:
Sensor connector one of the 2 tracks Track 5 computer connector
Sensor connector the other track Track 16 computer connector
Also check the insulation between these two connections.
Repair if necessary.
AFTER REPAIRClear the computer fault memory.
Carry out a road test followed by another check with the diagnostic tool.
ABS8.0_V0C_DF006 /ABS8.0_V0D_DF006ABS 8.0X84 4.0

ANTI-LOCK BRAKING SYSTEM
Fault finding - Interpretation of faults
38C
38C - 14V2 MR-372-J84-38C000$396_eng.mif
BOSCH ABS 8.0
Vdiag No.: 0C, 0D
DF006
CONTINUED
Vdiag No.: 0C, 0D
1.DEF
NOTESNone
Visually inspect the condition of the target and sensor (for dirt, metallic contamination, bearing grease, etc.), and
clean using compressed air if necessary.
If there is a lot of grease on the target, contact the Techline.
Check the quality of the mounting of the wheel speed sensor (correct clipping without excessive play).
Check the sensor/ target air gap over one revolution: 0.1 mm < Front wheel air gap < 1.2 mm.
Check the conformity of the target (condition, number of teeth = 48) using the specific command SC001 Check
target teeth.
If the checks are correct:
–the computer fault memory has been cleared,
–exit fault finding mode, switch off the ignition and carry out a road test.
Replace the instrumented bearing if the fault recurs.
AFTER REPAIRClear the computer fault memory.
Carry out a road test followed by another check with the diagnostic tool.
ABS 8.0X84 4.0

ANTI-LOCK BRAKING SYSTEM
Fault finding - Interpretation of faults
38C
38C - 15V2 MR-372-J84-38C000$396_eng.mif
BOSCH ABS 8.0
Vdiag No.: 0E, 0F
DF006
PRESENT
OR
STOREDLEFT-HAND FRONT WHEEL SPEED SENSOR CIRCUIT
CO.0 : Open circuit or short circuit to earth
1.DEF : Magnetic/mechanical target fault
2.DEF : Open circuit or short circuit
Vdiag No.: 0E, 0F
NOTESNone
Conditions for applying the fault finding procedure to stored faults:
The fault is declared present following a road test at a speed of > 36 mph (60 km/h).
CO.0
2.DEF
NOTESSpecial notes:
You must use command AC013 once only.
Check the connection and the condition of the sensor connectors.
Disconnect the sensor, run command AC013 Test wheel speed sensor supply and check that voltage pulses
of about 12 V are detected by a multimeter at the sensor connector terminals on the computer side.
Have you found voltage pulses?
YES
The wiring between the computer and the sensor, as well the supply via the computer,
is OK. Left-hand front wheel speed sensor fault - replace the sensor.
Check the connection and the condition of the computer connectors. Repair if necessary.
Check and ensure the continuity of the following connections:
Sensor connector one of the
2 tracksTrack 5 computer connector
Sensor connector the other track Track 16 computer connector
Also check the insulation between these two connections.
If all the checks are in order, contact Techline.
NO
AFTER REPAIRClear the computer fault memory.
Carry out a road test followed by another check with the diagnostic tool.
ABS8.0_V0E_DF006/ ABS8.0_V0F_DF006ABS 8.0X84 4.0

ANTI-LOCK BRAKING SYSTEM
Fault finding - Interpretation of faults
38C
38C - 16V2 MR-372-J84-38C000$396_eng.mif
BOSCH ABS 8.0
Vdiag No.: 0E, 0F
DF006
CONTINUED
Vdiag No.: 0E, 0F
1.DEF
NOTESNone
Visually inspect the condition of the target and sensor (for dirt, metallic contamination, bearing grease, etc.), and
clean using compressed air if necessary.
If there is a lot of grease on the target, contact the Techline.
Check the quality of the mounting of the wheel speed sensor (correct clipping without excessive play).
Check the sensor/ target air gap over one revolution: 0.1 mm < Front wheel air gap < 1.2 mm.
Check the conformity of the target (condition, number of teeth = 48) using the specific command SC001 Check
target teeth.
If the checks are correct:
–the computer fault memory has been cleared,
–exit fault finding mode, switch off the ignition and carry out a road test.
Replace the instrumented bearing if the fault recurs.
AFTER REPAIRClear the computer fault memory.
Carry out a road test followed by another check with the diagnostic tool.
ABS 8.0X84 4.0

ANTI-LOCK BRAKING SYSTEM
Fault finding - Interpretation of faults
38C
38C - 17V2 MR-372-J84-38C000$396_eng.mif
BOSCH ABS 8.0
Vdiag No.: 0C, 0D
DF007
PRESENT
OR
STOREDLEFT-HAND REAR WHEEL SPEED SENSOR CIRCUIT
CO.0 : Open circuit or short circuit to earth
1.DEF : Magnetic/mechanical target fault
Vdiag No.: 0C, 0D
NOTESSpecial notes:
The wheel speed sensors are fed with + 12 V APC but this feed cannot be measured
on Vdiag 0C and 0D (feed cut off when the sensor is faulty).
Conditions for applying the fault finding procedure to stored faults:
The fault is declared present following a road test at a speed of > 36 mph (60 km/h).
CO.0
NOTESNone
Check the connection and the condition of the sensor connectors.
Swap the two rear wheel speed sensors over.
Clear the computer's fault memory.
Carry out a road test followed by another check with the diagnostic tool.
If the fault initially declared DF007 "Rear left-hand wheel speed sensor circuit" becomes DF027 "Rear
right-hand wheel speed sensor circuit", replace the wheel speed sensor.
If the fault remains on the same side, the wiring between the computer and the sensor is faulty.
Check the connection and the condition of the computer connectors. Repair if necessary.
Check the connections (Track 31 and 32) at the R2 black 52-track intermediate connection beneath the front
left-hand seat. Repair if necessary.
Check and ensure the continuity of the following connections:
Sensor connector one of the 2 tracks Track 6 computer connector
Sensor connector the other track Track 17 computer connector
Also check the insulation between these two connections.
If the connections are faulty, carry out the following checks:
Check the insulation, continuity and absence of interference resistance between:
Computer connector track 6 Track 32 on the intermediate connector
Computer connector track 17 Track 31 on the intermediate connector
AFTER REPAIRClear the computer fault memory.
Carry out a road test followed by another check with the diagnostic tool.
ABS8.0_V0C_DF007 /ABS8.0_V0D_DF007ABS 8.0X84 4.0

ANTI-LOCK BRAKING SYSTEM
Fault finding - Interpretation of faults
38C
38C - 18V2 MR-372-J84-38C000$396_eng.mif
BOSCH ABS 8.0
Vdiag No.: 0C, 0D
DF007
CONTINUED
Vdiag No.: 0C, 0D
Also check the insulation between the following two connections. Repair or replace the wiring if necessary.
Check the insulation, continuity and absence of interference resistance between:
Sensor connector one of the 2 tracks Track 31 on the intermediate connector
Sensor connector the other track Track 32 on the intermediate connector
Also check the insulation between these two connections. Repair or replace the wiring if necessary.
1.DEF
NOTESNone
Visually inspect the condition of the target and sensor (for dirt, metallic contamination, bearing grease, etc.), and
clean using compressed air if necessary.
If there is a lot of grease on the target, contact the Techline.
Check that the wheel speed sensor mounting is in good condition.
Check the sensor/target air gap through one wheel revolution: 0.1 mm < Rear wheel air gap < 1.2 mm.
Check the conformity of the target (condition, number of teeth = 48) using the specific command SC001 Check
target teeth.
If the checks are correct:
–the computer fault memory has been cleared,
–exit fault finding mode, switch off the ignition and carry out a road test.
–Replace the rear left-hand "disc-hub-bearing" assembly (see MR364 or MR370 Mechanical, 33A, Rear axle
components, Bearing: Removal - Refitting) if the fault reappears.
AFTER REPAIRClear the computer fault memory.
Carry out a road test followed by another check with the diagnostic tool.
ABS 8.0X84 4.0

ANTI-LOCK BRAKING SYSTEM
Fault finding - Interpretation of faults
38C
38C - 19V2 MR-372-J84-38C000$396_eng.mif
BOSCH ABS 8.0
Vdiag No.: 0E, 0F
DF007
PRESENT
OR
STOREDLEFT-HAND REAR WHEEL SPEED SENSOR CIRCUIT
CO.0 : Open circuit or short circuit to earth
1.DEF : Magnetic/mechanical target fault
2.DEF : Open circuit or short circuit
Vdiag No.: 0E, 0F
NOTESNone
Conditions for applying the fault finding procedure to stored faults:
The fault is declared present following a road test at a speed of > 36 mph (60 km/h).
CO.0
2.DEF
NOTESSpecial notes:
You must use command AC013 once only.
Check the connection and the condition of the sensor connectors.
Disconnect the sensor, use command AC013 "Test wheel speed sensor supply" and check that pulses of
voltage of about 12 V are detected by a multimeter at the sensor connector terminals on the computer side.
Have you found voltage pulses?
YES
The wiring between the computer and the sensor, as well the supply via the computer,
is OK. Rear left-hand wheel speed sensor fault - replace the sensor.
Check the connection and the condition of the computer connectors. Repair if necessary.
Check the connections (Track 31 and 32) at the R2 black 52-track intermediate
connection beneath the front left-hand seat. Repair if necessary.
Check and ensure the continuity of the following connections:
Sensor connector one of the
2 tracksTrack 6 computer connector
Sensor connector the other track Track 17 computer connector
NO
AFTER REPAIRClear the computer fault memory.
Carry out a road test followed by another check with the diagnostic tool.
ABS8.0_V0E_DF007/ ABS8.0_V0F_DF007ABS 8.0X84 4.0