38C-77
AFTER REPAIRClear the computer fault memory.
Carry out a road test followed by another check with the diagnostic tool.
V3 MR-413-X44-38C050$140.mif
38C
Bosch 8.1 ESP
Vdiag No.: 05
accel.*: accelerationTool
parameter
codeDiagnostic 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.
PR007Longitudinal accelerationThis parameter indicates the longitudinal acceleration of
the vehicle in ms-2. It should be 0 when the vehicle is
stationary.
PR016Lateral accel.* programming offsetThis parameter gives the correction made by the ESP on
the gross value of the lateral acceleration sensor.
PR030Tachometric indexThis parameter specifies the tachometric index entered in
the computer for the tyres fitted to the vehicle.
PR033Steering wheel angleThis parameter gives the steering wheel angle in degrees.
It must be equal to 0˚
± 5˚ with the wheels set straight
ahead.
PR034Yaw angleThis parameter indicates the yaw angle in ˚/s supplied by
the combined sensor. It should be 0 when the vehicle is
stationary.
PR036Transverse accelerationThis parameter indicates the lateral acceleration in g
supplied by the combined sensor.
It should be 0 when the vehicle is stationary.
PR038Vehicle speedThis 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.
PR065Yaw angle programming offsetThis parameter indicates the correction applied by the ESP
to the yaw sensor gross value.
PR066Steering wheel angle
programming offsetThis parameter indicates the correction applied by the ESP
to the gross value of the steering wheel angle sensor.
ANTI-LOCK BRAKING SYSTEM
Fault finding – Parameter summary table
38C-78
AFTER REPAIRClear the computer fault memory.
Carry out a road test followed by another check with the diagnostic tool.
V3 MR-413-X44-38C050$150.mif
38C
Bosch 8.1 ESP
Vdiag No.: 05
Tool command Diagnostic tool title Comments
RZ001Fault memory This command is used for clearing the computer's stored faults
RZ011Sensor offsetsThis command reinitialises programming of the ESP sensors.
Run this command each time an operation required the steering
wheel angle to be programmed or following any operation on the
axle assemblies.
Also run this command when the combined sensor has been
removed or replaced
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 indicate 48 teeth.
SC006Bleed the hydraulic unit and
brake circuitsThis command should only be used if an abnormally long brake
pedal travel is noted during a road test with ABS control (the
system must have been bled beforehand by the usual method).
Select command SC006 and follow the instructions given by the
diagnostic tool.
AC003Front left-hand wheel solenoid
valvesSee the interpretation of command (see Interpretation of
commands).
AC004Front right-hand wheel
solenoid valvesSee the interpretation of command (see Interpretation of
commands).
AC005Rear left-hand wheel solenoid
valvesSee the interpretation of command (see Interpretation of
commands).
AC006Rear right-hand wheel solenoid
valvesSee the interpretation of command (see Interpretation of
commands).
AC013Wheel speed sensor supply
testSee the interpretation of command (see Interpretation of
commands).
AC016Pump motor testSee the interpretation of command (see Interpretation of
commands).
AC187Brake light activation relaySee the interpretation of command (see Interpretation of
commands).
AC195Vehicle speed signalSee the interpretation of command (see Interpretation of
commands).
AC196Hazard warning light activation
requestSee the interpretation of command (see Interpretation of
commands).
ANTI-LOCK BRAKING SYSTEM
Fault finding – Command summary table
38C-83
AFTER REPAIRClear the computer fault memory.
Carry out a road test followed by another check with the diagnostic tool.
V3 MR-413-X44-38C050$160.mif
ANTI-LOCK BRAKING SYSTEM
Fault finding – Interpretation of commands38C
Bosch 8.1 ESP
Vdiag No.: 05
AC195VEHICLE SPEED SIGNAL
NOTESConditions of use of the command.
Ignition on, engine stopped and vehicle speed zero.
This command is used to generate a speed other than 0 mph (0 km/h) at the computer's vehicle speed wire output
(connection 47F) for users of that signal (radio, sunroof, power-assisted steering).
This command has no visible effect on the dashboard speedometer needle.
Radio: Switch on the radio and check that the "adjustment of volume according to speed" function is active
(see 86A, radio).
Run the command AC195. During the command, you should hear the volume of the sound increase and then
decrease.
Variable electric power-assisted steering: Start the vehicle then return to the conditions of use of the command.
Turn the steering wheel from lock to lock using command AC195, to note a variation in the assistance level.
ESP_V05_AC195
38C-100
AFTER REPAIRClear the computer fault memory.
Carry out a road test followed by another check with the diagnostic tool.
V3 MR-413-X44-38C050$180.mif
ANTI-LOCK BRAKING SYSTEM
Fault finding – Fault finding chart38C
Bosch 8.1 ESP
Vdiag No.: 05
ALP14 Erratic ESP regulation
NOTESOnly address this customer complaint after a complete check with the diagnostic tool.
Check that the 4 vehicle tyres are identical and in accordance with the manufacturer's recommendations (see
MR 411, Mechanical, 35A, Wheels and tyres, Tyres, Identification).
Check that the pressures of the 4 tyres conform to the manufacturer's recommendations (see MR 411,
Mechanical, 35A, Wheels and tyres, Tyre pressure, Identification).
Using the diagnostic tool, check that the vehicle version corresponds to the vehicle type.
If necessary, reconfigure the vehicle version using command VP004 Vehicle parameters to correspond to the
vehicle type.
Using parameter PR030 Tachometric index, check that the tachometric index corresponds to the vehicle type.
If necessary, reconfigure the tachometric index using command VP007 Tachometric index to correspond to the
vehicle.
Check the connection and condition (possible wiring damage) of the connector of component 1175.
If the connector is faulty (see Technical Note 6015A, Repairing electrical wiring, Wiring: Precautions for
repair), repair the connector, otherwise replace the wiring.
Check that component 1175 is properly mounted on the body and in the correct direction (the arrow must point
towards the front of the vehicle).
Calibrate component 583 using command VP003 Steering wheel angle sensor (see Configurations and
programming).
Clear the ESP sensor offsets using command RZ011 Sensor offsets.
Clear the faults from the computer using the command RZ001 "Fault memory".
Carry out a road test followed by another check with the diagnostic tool.
If the fault is still present:
–Adjust the axle geometry (see MR 411, Mechanical, 30A, General information, Front axle, Adjustment).
–Calibrate component 583 using command VP003 Steering wheel angle sensor (see Configurations and
programming).
–Clear the ESP sensor offsets using command RZ011 Sensor offsets.
–Clear the faults from the computer using the command RZ001 "Fault memory".
–Carry out a road test followed by another check with the diagnostic tool.
If the fault is still present, contact the Techline.
ESP_V05_ALP14
