1998 AUDI A4 lock

01-270
Test table: display group 5 Read measuring value
block 5
Indicated on display
- 720
...
+720
- 69
/s ...
+ 69 /s
- 41
bar ...
+292
bar - 25 m/s2 ...
+ 25 m/s2


Transverse acceleration:

Specification with vehicle at standstill: 0....0.7 m/s2 Specification with steering wheel fully turned at a speed of 20 km/h: max. 6.0 m/s2; the
value of the measured value increases steadily. Another test for the sensor is located page 01
-271
; Fig. 1
.

Brake pressure:

Specification with brake pedal not depressed: 0....5 bar

Rotation rate:
Specification with vehicle at standstill: 3 /sSpecification with steering wheel fully turned at a vehicle speed of 20 km/h: max. 65 /s; the value of the
measured value increases steadily.
Steering angle:

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01-272


After this, a value of either - 9,8 1 m/s2 or
+ 9,8 1 m/s2 will be indicated on the scan
tool display in display group 5 (use the "Read
measuring value block" function).
A plus in front of the number indicates the
affect on the sensor while driving around a
left-hand curve.

A minus in front of the number indicates the
affect on the sensor while driving around a
right-hand curve.

After reinstalling the sensor for transverse
acceleration -G200- or the combined sensor
for yaw rate and transverse acceleration,
tighten the mounting bolts to 5 Nm. Tighten
the mounting bolts for the control module for
ultra-sound sensors -J347- to 2 Nm.

Note:
Due to an error in the test card 8.0 for the
VAG1551 scan tool and the test card 5.0 for the
VAG1552 scan tool, the display for Measuring
Value Block 5, display group 4 is offset by one
decimal point. This means, for example, that a
transverse acceleration value of 9.81m/s2 is
displayed simply as 0.98 m/s2 .
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01-273

Note:
The display group numbers can be selected in
sequence by pressing buttons <-1 and 3-> on the
VAG1551 scan tool, or the arrow buttons and
on the VAG1552 mobile scan tool or the arrow
buttons and on the screen of the VAS5051
tester.
- Press -C- button to input display group number
manually. Read measurin
g value block
Enter display group number XXX

Indicated on display:
- Press buttons -0-, -0- and -6-.
- Press -Q- button to confirm input.
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01-274
Test table: display group 6 Read measuring value
block 6
Indicated on display
0 volts to 18
volts
on
or
off
on
or
off 0 ...
131071


Workshop code:

The workshop code indicates the last workshop that executed the "Login Procedure" (function
11) under address word 03, "Brake electronics" page 01
-237
.
If no code is displayed, the "Login Procedure" under address word 03 "Brake Electronics" has
not been carried out yet.

Voltage at motor for ABS return flow pump:

off specified value, there is no voltage at the motor for the ABS return flow pump. on not permitted during "Read measuring value block", there is voltage at the motor for the ABS
return flow pump.
- Carry out "Electrical test", steps 12, 23 and 24.

ABS solenoid valve relay:

on specified value, relay was activated by ABS control module -J104- during ignition on. off not permitted during "Read measuring value block", the relay was not activated during "ignition on".
- Carry out "Electrical test", steps 11 and 22.
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01-275

Note:
The display group numbers can be selected in
sequence by pressing buttons <-1 and 3-> on the
VAG1551 scan tool, or the arrow buttons and
on the VAG1552 mobile scan tool or the arrow
buttons and on the screen of the VAS5051
tester.
- Press -C- button to input display group number
manually. Read measurin
g value block
Enter display group number XXX

Indicated on display:
- Press buttons 1-, 2- and -5-.
- Press -Q- button to confirm input.
Pa
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01-277
Test table: display group 125 Read measuring value block
125
Indicated on display
Steering angle

0 or 1 Engine
0 or 1
Transmission
0 or 1 not
used



Transmission Control Module (TCM): (only for vehicles with automatic transmission)

0: No information received from the Transmission Control Module (TCM) via the CAN-bus.
1: Information is being received from the Transmission Control Module (TCM) via the CAN-
bus.

Engine Control Module (ECM):

0: No information received from the Engine Control Module (ECM) via the CAN-bus.
1: Information is being received from the Engine Control Module (ECM) via the CAN-bus.
Steering angle sensor:

0: No information received from the steering angle sensor via the CAN-bus.
1)
1: Information is being received from the steering angle sensor via the CAN-bus.
1) If the steering angle sensor is OK, it sends information, even if the zeroing procedure was not performed.
Note:
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01-282
During the test, the individual test steps are
shown in the second line of the VAG1551 scan
tool display. The following abbreviations are
used.
IV = Inlet valve
OV = Outlet valve
LF = Left Front
RF = Right Front
LR = Left Rear
RR = Right Rear
B+ = Battery Positive Voltage (B+) at valve
0V = 0 volts; No voltage at valve
Locked/free = Wheel condition; must be checked
by second technician
Hydr-P = Hydraulic pump
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01-284

Output Diagnostic Test Mode (DTM)
-
ABS hydraulic pump -
V64-

Indicated on display:
ABS hydraulic pump -V64- must start running. This is audible.

When you put your foot on the brake pedal you can feel it vibrating. The
brake pedal vibrates because the hydraulic pump generates pressure
pulses in the brake lines. The pressure pulses generate oscillations.
These are directed to the brake pedal and make it vibrate.
The pressure pulses in the brake lines are not sufficient to lock the
wheels.
Pa
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g (scan tool function 04
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yp
e=re
pair&id=AUDI.B5.SU02.01.15