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

ANTI-LOCK BRAKING SYSTEM
Fault finding - Introduction
38C
38C - 3V2 MR-372-J84-38C000$066_eng.mif
BOSCH ABS 8.0
Vdiag No.: 0C, 0D, 0E, 0F
Faults
Faults are declared as either present or stored (depending on whether they appeared in a certain context and have
disappeared since, or whether they remain present but have not been diagnosed within the current context).
The present or stored status of faults should be taken into consideration when the diagnostic tool is switched on
after the + after ignition feed (without any system components being active).
For a present fault, apply the procedure described in the Interpretation of faults section.
For a stored fault, note the faults displayed and apply the instructions in the Notes section.
If the fault is confirmed when the instructions in the Notes section are applied, the fault is present. Deal with the fault
If the fault is not confirmed, check:
–the electrical lines which correspond to the fault,
–the connectors for these lines (for oxidation, bent pins, etc.),
–the resistance of the component detected as faulty,
–the condition of the wires (melted or split insulation, wear).
Conformity check
The aim of the conformity check is to check data that does not produce a fault on the diagnostic tool because the
data is inconsistent. Therefore, this stage is used to:
–carry out fault finding on faults that do not have a fault display, and which may correspond to a customer
complaint.
–check that the system is operating correctly and that there is no risk of a fault recurring after repairs.
This section gives the fault finding procedures for statuses and parameters and the conditions for checking them.
If a status is not behaving normally or a parameter is outside the permitted tolerance values, consult the
corresponding fault finding page.
Customer complaints - Fault finding chart
If the test with the diagnostic tool is OK but the customer complaint is still present, the fault should be processed by
customer complaints.
A synopsis of the general procedure to follow is provided on the following page
in the form of a flow chart
ABS 8.0X84 4.0

ANTI-LOCK BRAKING SYSTEM
Fault finding - Introduction
38C
38C - 6V2 MR-372-J84-38C000$066_eng.mif
BOSCH ABS 8.0
Vdiag No.: 0C, 0D, 0E, 0F
5. FAULT FINDING LOG
You will always be asked for this log:
●when requesting technical assistance from Techline,
●for approval requests when replacing parts for which approval is mandatory,
●to be attached to monitored parts for which reimbursement is requested. The log is needed for warranty
reimbursement, and enables better analysis of the parts removed.
6. SAFETY ADVICE
Safety rules must be observed during any work on a component to prevent any damage or injury:
–make sure that the battery is properly charged to avoid damaging the computers with a low load,
–use the appropriate tools.
–It is forbidden to carry out a road test with the diagnostic tool in dialogue with the ECU because
the ABS and Electronic Brake Distribution functions are deactivated. Braking pressure is
identical on both vehicle axles (risk of a spin under heavy braking). IMPORTANT!IMPORTANT
Any fault on a complex system requires thorough fault finding with the appropriate tools. The
FAULT FINDING LOG, which should be completed during the procedure, enables you to keep
track of the procedure which is carried out. It is an essential document when consulting the
manufacturer.
IT IS THEREFORE MANDATORY TO FILL OUT A FAULT FINDING LOG EACH TIME FAULT FINDING
IS CARRIED OUT.
ABS 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 - 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 - 24V2 MR-372-J84-38C000$396_eng.mif
BOSCH ABS 8.0
Vdiag No.: 0C, 0D
DF026
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 wheel 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 - 26V2 MR-372-J84-38C000$396_eng.mif
BOSCH ABS 8.0
Vdiag No.: 0E, 0F
DF026
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 wheel 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
Diagnostic - Fault finding chart
38C
38C - 61V2 MR-372-J84-38C000$924_eng.mif
BOSCH ABS 8.0
Vdiag No.: 0C, 0D, 0E, 0F
ALP11 Noise from the pump, pipes or hydraulic unit
NOTESOnly consult this customer complaint after a complete check with the diagnostic tool.
Vibration of the unit: check the presence and the condition of the unit bracket insulating rubber mounting bushes.
Vibration of pipes: check that all the pipes are securely clipped in their retaining clips and that there is no contact
between pipes or between pipes and bodywork.
To determine where the noise is coming from, run the solenoid valve actuation commands Front left-hand wheel
solenoid valves, Front right-hand wheel solenoid valves, Rear left-hand wheel solenoid valves and Rear
right-hand wheel solenoid valves while depressing the brake pedal.
AFTER REPAIRClear the computer memory.
Carry out a road test followed by another check with the diagnostic tool.
ABS8.0_V0C_ALP11/ABS8.0_V0D_ALP11/ABS8.0_V0E_ALP11/ABS8.0_V0F_ALP11 ABS 8.0X84 3.0