ESP AUDI A4 1998 B5 / 1.G Brakes Basic Setting 04 Workshop Manual

01-242


Basic setting (scan tool
function 04)
Initiating "Basic Setting" function 04 does the
following for ESP:

The steering angle sensor -G85- is zeroed
using display group 001 page 01
-243

Before you can zero the sensor, you must have
successfully carried out the "Login Procedure"
function 11 using the VAG1551/1552 scan tool
and the ABS control module -J104- must be
coded page 01
-234
.

The hydraulic pump for traction control -
V156- is activated using display group 002
Activation of the hydraulic pump for traction
control -V156- does not require any preparations.
It is used to bleed the hydraulic system page
01
-248
.

The ESP driving test is activated using
display group 003
The ESP driving test is used to test the
plausibility of the signals from the sensor for
transverse acceleration, yaw sensor and
pressure sensor page 01
-250
.
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ESP driving and system test

The ESP driving test is used to test the
plausibility of the signals from the sensor for
transverse acceleration, yaw sensor, and
pressure sensor.

Road test vehicle
Some DTCs are only recognized by the On
Board Diagnostic (OBD)while the vehicle is
moving. You can check the entire system during
a road test. During road test, drive at a speed of
at least 60 km/h for 30 seconds. Check traffic
conditions and perform an ABS regulated braking
when appropriate. You will feel a pulsing in the
brake pedal indicating the system is active.

Note:
Once the ESP driving test has been initiated, it
cannot be aborted and must be performed
completely. After exiting the diagnostic, the
ABS/EDL and ASR/ESP lamps remain switched
on in order to indicate that the test is active and
that system function is not available yet.
Warning, ABS and ESP not functioning!
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WARNING!

While system is in diagnostic, the
ABS/ESP/EBD is not active. Driving the
vehicle after On Board Diagnostic (OBD) has
detected a malfunction presents the risk of
accident. The brake system will only be
partially functional. Because brake pressure
at the rear wheels is no longer regulated vie
Electronic Brake Distribution (EBD), the rear
wheels tend to brake excessively. This
causes the rear of the vehicle to break loose.

When the use of test equipment is required
during road tests, test equipment must
always be secured to the rear seat and
operated from there by a second person. If
test and measuring equipment is operated
from the passenger seat, the person seated
there could be injured in the event of an
accident involving deployment of the
passenger-side airbag.
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- Connect VAS5051 tester or VAG1551 scan tool
and select the address word 03 "Brake
Electronics" page 01
-4
Rapid data transfer
HELP
Select function XX

Indicated on display:
- Press buttons -0- and -4- to select function 04 "Basic Setting"
Rapid data transfer
Q
04 - Basic Settin
g

Indicated on display:
- Press -Q- button to confirm input.
Basic Setting
Q
Enter displa
y group number XXX

Indicated on display:
- Press buttons -0-, -0-, and -3-. Press -Q- button to confirm input.
System in basic setting
3
System test activated
OK

Indicated on display:
The ESP driving test is activated.
The ABS warning light -K47- and the traction control indicator light -
K86- go on.
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Make a right or left turn. Then reverse the
direction and continue driving until the
ABS/EDL lamp turns off.

Note:
While driving around the curves, a yaw rate of
around 10 /sec must be obtained. A curve with
a radius of 10 to 12 m and a speed of 15 to 20
km/h for around 4 sec. fulfills this requirement.

The ABS warning light -K47- must go out. This
completes the ESP driving test and the system
is OK.

If the ABS/ESP warning light -K47- remains lit,
the test is not OK (system locked). Check DTC
memory.
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If the ABS warning light -K47- does not go out,
the ESP driving test was not performed properly.

If the ABS warning light -K47- does not go out,
and the traction control indicator light -K86-
lights up again, there are malfunctions in the
system; Check DTC memory page 01
-356


Note:
If the ESP driving test was interrupted, e.g.: by
switching off the ignition, the entire test must be
repeated.
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Read Measuring Value Block (function
08)

The control module can transmit measured
values to the VAS5051 tester and VAG1551
Scan Tool (ST). These measured values provide
information about the operational status of the
system and the sensors connected to it. In many
cases the data supplied can be used to
troubleshoot and repair malfunctions. The
measured values provided by ESP are contained
in six display groups, which can be accessed via
their display group numbers.

- Connect the VAS5051 tester or VAG1551 Scan
Tool (ST) and select the address word 03 "Brake
Electronics".
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Note:

For test table display group 125:
Display group 125 is not occupied for control
modules with no. 4B0 907 389 and cannot be
selected for these control modules by pressing
buttons <-1 and 3-> on the VAG1551 or by
pressing the arrow buttons and on the
VAG1552 or via manual input.
If an attempt is made to select display group
number 125 despite this: Function is unknown or can not be performed at the moment.

Indicated on display:
-
Press button.
Rapid data transfer
HELP
Select function XX

Indicated on display:
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Are you sure there are no electrical malfunctions
in the system? If you have made sure that there
are no electrical malfunctions in the system, you
will be able to identify any mechanical
malfunctions in the individual actuators if the
results of the output DTM are not as specified
here. Replace the relevant part.
With the Bosch 5.3 ABS/ESP the output
Diagnostic Test Mode (DTM) enables you to
check the electrically actuated hydraulic valves
and the pump motor in the hydraulic module. You
can also check that the brake lines going to the
four wheels are connected correctly.
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If the wheels do not lock, visually inspect brake fluid reservoir, master
brake cylinder, hydraulic unit, and calipers.
Concentrate on the left-front wheel first. The function of the control
elements for this wheel is tested first.
Note:
This test step in the output diagnostic test mode corresponds to the
"pressure build-up" phase during ABS-controlled braking.
-
Press button.
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