display 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 - Interpretation of faults
38C
38C - 21V2 MR-372-J84-38C000$396_eng.mif
BOSCH ABS 8.0
Vdiag No.: 0C, 0D, 0E, 0F
DF017
PRESENT
OR
STOREDCOMPUTER
1.DEF : Feed fault or internal electronic fault
2.DEF : Programming / initialisation invalid
NOTESSpecial notes:
The voltage displayed in the parameter (PR005) is the + after ignition feed voltage of
the computer and not the hydraulic unit power feed.
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).
Check the connections and the condition of the battery terminals.
Check the condition and position of the ABS fuses in the engine fuse and relay box.
Check the 50A power fuse in position 5 on the power fuse board.
Check the 25A fuse F13 on the UPC and the correct locking of the grey 4-track PPHI connector (Vdiag 44) or
test the 25A fuse F8 on the UPC and the correct locking of the black 6-track CM connector (Vdiag 48).
Check the connection and condition of the tab 1 red wire of the grey connector.
Check the connections on the 26-track connector of the ABS computer.
Check the ABS earths on tracks 1 and 4 (attached under the ABS unit) and carry out an inspection of the entire
ABS wiring.
Check the continuity between the fuses and tracks 2 and 3 of the computer connector (+ Before ignition present
on the tracks) and between the UCH and track 18 of the computer (+ After ignition present on the track).
Clear the computer fault memory. Switch off the ignition.
Switch on the ignition again and carry out another check using the diagnostic tool.
If the fault is still present, contact the Techline.
2.DEF
NOTESSpecial notes:
No programming for PR020 Vehicle speed at initialisation.
ABS warning light flashing at 8 Hz outside fault finding
conditions.
Run command VP032 and select "Type 1" or "Type 2" according to the information supplied by the diagnostic tool.
Clear the computer fault memory, switch the ignition off and carry out a road test. If the fault is still present, contact
the Techline.
AFTER REPAIRClear the computer fault memory.
Carry out a road test followed by another check with the diagnostic tool.
ABS8.0_V0C_DF017 /ABS8.0_V0D_DF017/ABS8.0_V0E_DF017/ABS8.0_V0F_DF017 ABS 8.0X84 4.0

ANTI-LOCK BRAKING SYSTEM
Fault finding - Interpretation of faults
38C
38C - 41V2 MR-372-J84-38C000$396_eng.mif
BOSCH ABS 8.0
Vdiag No.: 0C, 0D, 0E, 0F
DF188
PRESENT
OR
STOREDBRAKE LIGHT SWITCH CIRCUIT
NOTESSpecial notes:
This fault does not cause illumination of any warning lights, nor does it generate any
fault message.
Conditions for applying the fault finding procedure to stored faults:
Clear the stored fault, carry out a road test at a speed of > 37 mph (60 km/h) and test
the brakes using ABS.
Check the conformity of the brake light bulbs.
Using the diagnostic tool, check on the statuses screen that ET017 Brake pedal displays the pressed and released
positions of the brake pedal correctly.
If the correct pedal position is not displayed, use the interpretation of ET017.
If the fault is still present, contact the Techline.
AFTER REPAIRClear the computer fault memory.
Carry out a road test followed by another check with the diagnostic tool.
ABS8.0_V0C_DF188 /ABS8.0_V0D_DF188/ABS8.0_V0E_DF188/ABS8.0_V0F_DF188 ABS 8.0X84 4.0

ANTI-LOCK BRAKING SYSTEM
Fault finding - Conformity check
38C
38C - 43V2 MR-372-J84-38C000$528_eng.mif
BOSCH ABS 8.0
Vdiag No.: 0C, 0D, 0E, 0FANTI-LOCK BRAKING SYSTEM
Fault finding - Conformity check
NOTESOnly carry out this conformity check after a complete check using the diagnostic
tool.
Order FunctionParameter or Status
checked or Action Display and Notes Fault finding
1Diagnostic tool
dialogueBOSCH ABS 8.0Apply Fault Finding
Chart 1
2Computer
configurationPR030:Tachometric
indexMake sure the index
entered matches the
vehicle's tyres (see
Replacing
components)None
3Vehicle
parameter
readingPR063:Vehicle
parametersEnsure that the
parameters correspond
to the vehicle
undergoing fault finding.See Configurations and
Programming (VP004)
4Brake pedal not
depressed
detectionET017:Brake pedalReleased status
confirmed, brake pedal
not depressedIn the event of a fault,
apply interpretation of
ET017.
5Depressed
brake pedal
detectionET017:Brake pedal"Depressed" status
confirmed; brake pedal
fully depressedIn the event of a fault,
apply interpretation of
ET017.
6Vehicle speed at
initialisationPR020:Vehicle speed at
initialisationCheck that the value is
correct according to the
information in the Help
sectionIn the event of a fault,
apply parameter VP032
Vehicle speed at
initialisation.
ABS8.0_V0C_CCONF/ABS8.0_V0D_CCONF/ ABS8.0_V0E_CCONF/ABS8.0_V0F_CCONF ABS 8.0X84 4.0
MR-372-J84-38C000$528_eng.mif