Page 27 of 57
38C-27
AFTER REPAIRClear the computer memory using command RZ001 Fault memory.
Carry out a road test followed by another check with the diagnostic tool.
V1 MR-376-X76-38C000$090.mif
ANTI-LOCK BRAKING SYSTEM
Fault finding – Interpretation of faults38C
ABS BOSCH 8.1
Vdiag No.: 18
DF027
CONTINUED 2
1.DEFNOTESNone.
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 conformity of the target (condition, number of teeth = 48 or 44 depending on the version) with the specific
command SC001 Check target teeth.
If the checks are correct:
– clear the computer fault memory using the command RZ001 Fault memory,
– exit fault finding mode, switch off the ignition and carry out a road test.
Replace the instrumented bearing if the fault recurs.
If the fault is still present, contact the Techline.
Page 28 of 57
38C-28
AFTER REPAIRClear the computer memory using command RZ001 Fault memory.
Carry out a road test followed by another check with the diagnostic tool.
V1 MR-376-X76-38C000$090.mif
ANTI-LOCK BRAKING SYSTEM
Fault finding – Interpretation of faults38C
ABS BOSCH 8.1
Vdiag No.: 18
DF063
PRESENT
OR
STOREDWHEEL SPEED CONSISTENCY
1.DEF: Interference
NOTESPriorities when dealing with a number of faults :
Deal with faults DF006 Front left-hand wheel speed sensor circuit, DF007 Rear left-
hand wheel speed sensor circuit, DF026 Front right-hand wheel speed sensor
circuit and DF027 Rear right-hand wheel speed sensor circuit first even if they are
stored.
Conditions for applying the fault finding procedure to stored faults:
The fault is declared present during a road test.
Check the condition of the braking system (condition of linings, sealing, grating, bleed, etc.).
Check the condition of the axles and the conformity and good condition of the tyre mountings.
Check how well the wheel speed sensors are fitted (correct clipping).
Repair if necessary.
If the fault is still present, contact the Techline.
ABS8.1X76_V18_DF063
Page 29 of 57
38C-29V1 MR-376-X76-38C000$100.mif
38C
ABS BOSCH 8.1
Vdiag No.: 18
MAIN SCREEN
NOTESOnly carry out this conformity check after a complete check with the diagnostic tool.
FunctionStatus or parameter
checked or actionNotes Fault finding
Diagnostic tool
dialogueSee the interpretation of ALP1
No dialogue with the ABS
computer ABS BOSCH 8.1
Vehicle parametersPR063:Vehicle
parametersCheck that the
parameters are
consistent with the
vehicle on which fault
finding is being run.See configurations (VP004
Vehicle parameters).
Brake pedal not
depressed detectionET017:Brake pedalReleased status
confirmed, brake pedal
not depressed
If there is a fault, apply the
interpretation of status ET017
Depressed brake
pedal detectionET017:Brake pedalDepressed status, brake
pedal depressed
Computer supplyPR005:Computer
feed voltageThis parameter indicates
the feed voltage at the
computer terminals.In the event of a fault, apply
the interpretation of fault
DF001 Computer supply
Vehicle speedPR038:Vehicle speedThis parameter indicates
the vehicle speed in mph
(km/h).
Ensure that the vehicle
speed is consistent.In the event of a fault, apply
the interpretation of fault
DF063 Wheel speed
consistency
Computer
configurationPR030:Tachometric
indexMake sure that the index
entered matches the
tyres fitted to the vehicle.See configurations (VP007
Tachometric index).
ABS8.1X76_V18_CCONF
ANTI-LOCK BRAKING SYSTEM
Fault finding – Conformity check
Page 30 of 57
38C-30V1 MR-376-X76-38C000$100.mif
ANTI-LOCK BRAKING SYSTEM
Fault finding – Conformity check38C
ABS BOSCH 8.1
Vdiag No.: 18
MAIN SCREEN (CONTINUED)
NOTESOnly carry out this conformity check after a complete check with the diagnostic tool.
FunctionStatus or parameter
checked or actionNotes Fault finding
Front right-hand wheel
speedPR001:Front right-
hand wheel
speedEnsure that the wheel
speed is consistentIn the event of a fault, apply
the interpretation of fault
DF026 Front right-hand
wheel speed sensor circuit
Front left-hand wheel
speedPR002:Front left-
hand wheel
speedEnsure that the wheel
speed is consistentIn the event of a fault, apply
the interpretation of fault
DF006 Front left-hand wheel
speed sensor circuit
Rear right-hand wheel
speedPR003:Rear right-
hand wheel
speedEnsure that the wheel
speed is consistentIn the event of a fault, apply
the interpretation of fault
DF027 Rear right-hand wheel
speed sensor circuit
Rear left-hand wheel
speedPR004:Rear left-hand
wheel speedEnsure that the wheel
speed is consistentIn the event of a fault, apply
the interpretation of fault
DF007 Rear left-hand wheel
speed sensor circuit
Page 31 of 57
38C-31V1 MR-376-X76-38C000$100.mif
ANTI-LOCK BRAKING SYSTEM
Fault finding – Conformity check38C
ABS BOSCH 8.1
Vdiag No.: 18
BRAKING REGULATION
NOTESOnly carry out this conformity check after a complete check with the diagnostic tool.
FunctionStatus or parameter
checked or actionNotes Fault finding
Front right-hand wheel
solenoid valvesAC004:Front right-
hand wheel
solenoid
valvesThis command is used to
perform a hydraulic
check of the front right-
hand wheel.In the event of a fault, apply the
interpretation of command
AC004.
Front left-hand wheel
solenoid valvesAC003:Front left-hand
wheel
solenoid
valvesThis command is used to
perform a hydraulic
check of the front left-
hand wheel.In the event of a fault, apply the
interpretation of command
AC003.
Rear right-hand wheel
solenoid valvesAC006:Rear right-
hand wheel
solenoid
valvesThis command is used to
perform a hydraulic
check of the rear right-
hand wheel.In the event of a fault, apply the
interpretation of command
AC006.
Rear left-hand wheel
solenoid valvesAC005:Rear left-hand
wheel
solenoid
valvesThis command is used to
perform a hydraulic
check of the rear left-
hand wheel.In the event of a fault, apply the
interpretation of command
AC005.
Pump motor testAC016:Pump motor
testThis command is used to
test the pump motor
control circuit.In the event of a fault, apply the
interpretation of command
AC016.
Wheel speed sensor
supply testAC013:Wheel speed
sensor supply
testThis command allows
testing every wheel
speed sensor supply.In the event of a fault, apply the
interpretation of command
AC013.
Page 36 of 57
38C-36V1 MR-376-X76-38C000$130.mif
38C
ABS BOSCH 8.1
Vdiag No.: 18
Tool
ParameterDiagnostic tool title Comments
PR001Front right-hand wheel speed
These parameters indicate the speed in mph (km/h) of each
wheel on the vehicle. PR002Front left-hand wheel speed
PR003Rear right-hand wheel speed
PR004Rear left-hand wheel speed
PR005Computer feed voltageThis parameter indicates the computer supply voltage in
volts.
PR030Tachometric indexThis parameter specifies the tachometric index entered in the
computer for the tyres fitted to the vehicle.
PR038Vehicle speed This parameter indicates the vehicle speed in mph (km/h).
PR063Vehicle parametersThis parameter shows whether the configuration (VP004
Vehicle parameters) matches the vehicle undergoing fault
finding
ANTI-LOCK BRAKING SYSTEM
Fault finding – Parameter summary table
Page 37 of 57
38C-37V1 MR-376-X76-38C000$140.mif
38C
ABS BOSCH 8.1
Vdiag No.: 18
Tool
commandDiagnostic tool title Comments
RZ001Fault memory This command is used to clear the faults stored in the computer.
AC003Front left-hand wheel
solenoid valvesSee interpretation of command AC003.
AC004Front right-hand wheel
solenoid valvesSee interpretation of command AC004.
AC005Rear left-hand wheel
solenoid valvesSee interpretation of command AC005.
AC006Rear right-hand wheel
solenoid valvesSee interpretation of command AC006.
AC013Wheel speed sensor supply
testSee interpretation of command AC013.
AC016Pump motor test See interpretation of command AC016.
ANTI-LOCK BRAKING SYSTEM
Fault finding – Command summary table
Page 38 of 57
38C-38V1 MR-376-X76-38C000$140.mif
ANTI-LOCK BRAKING SYSTEM
Fault finding – Command summary table38C
ABS BOSCH 8.1
Vdiag No.: 18
Tool
commandDiagnostic tool title Comments
SC001Check target teethThis command tests the condition of the teeth on each wheel.
Select the command SC001 and follow the instructions.
The test result should be equal to 48 or 44 teeth depending on
the version.
SC006Bleed the hydraulic unit and
brake circuits.This command must be used only in the event of abnormal
lengthening of brake pedal travel during a road test with ABS
regulation (the vehicle must have already been bled using the
conventional procedure).
Select command SC006 and follow the instructions given by the
diagnostic tool.
