warning AUDI A4 1998 B5 / 1.G Brakes Output DTM 03 Workshop Manual

01-151

Notes:

To avoid overloading the components being
checked, they are actuated during the test
sequence for a period of 60 (or 90) seconds.
The actuator test will be terminated if the "
button" is not pressed within this period.

The ABS warning light and the red "brake
system malfunction" symbol blink during the
test.
Pressing the brake pedal repeatedly this
relieves the vacuum in the brake booster. For
this reason, the brake pedal must be pressed
harder in order to achieve the same braking
effect. Your work will be easier if you run the
engine briefly. This will build up vacuum in the
brake booster again.
Pa
ge 4 of 66 Out
put Dia
gnostic Test Mode
(DTM
) (function 03
)
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yp
e=re
pair&id=AUDI.B5.SU02.01.13

01-165

-
Press button.Output Diagnostic Test Mode (DTM)
-
End

Indicated on display:
Note:
The output diagnostic test mode is completed. The ABS/EDL warning light
and the red warning symbol for brake system go out.
-
Press button.
Rapid data transfer
HELP
Select function XX

Indicated on display:
Note:
If the ABS/EDL warning light does not go out, this indicates a
malfunction in the system. Observe test sequence exactly page 01
-
17
.
- Press buttons -0- and -6- to select "End Output" function 06. Press -Q-
button to confirm input.
Pa
ge 19 of 66 Out
put Dia
gnostic Test Mode
(DTM
) (function 03
)
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e=re
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01-171

Terminal
Wire connection to component ...
10
Electrical connection to instrument cluster
Only for vehicles equipped with EDL. The time signals used to calculate standing time are transmitted via
this harness connector
11
K-wire 13
MMD signal (Masked Misfire Diagnostic)
For vehicles equipped with ASR, the SET signal (Specified Engine Torque) is also transmitted via this wiring
harness.
14
Brake light switch -F- 15
Voltage supply, terminal 15 16
Ground (GND) terminal 31 (ABS hydraulic pump -V64-) 17
Battery + (terminal 30) 18
Battery + (terminal 30) 19
Ground (GND) terminal 31 (ABS control module -J104-) 20
Traction control (ASR) indicator light activation
Only for vehicles equipped with ASR.
21
ABS/EDL warning light activation 23
Speed sensor output rear left
For vehicles with navigation system
Pa
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put Dia
gnostic Test Mode
(DTM
) (function 03
)
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yp
e=re
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01-179

Function test: ABS/EDL warning light -K47-
Test
step VAG
1598
sockets Test of
Test requirements
- Additional work stepsSpecified
value Corrective
action
8 - Function of ABS/EDL
warning light -K47-. DTC memory checked and no DTC present
in DTC memory of ABS control module -
J104-. Ignition switched off Multi-pin connector connected to ABS
control module -J104- and retainer catch
engaged.
Test step 8: Continued on
next page.
Pa
ge 34 of 66 Out
put Dia
gnostic Test Mode
(DTM
) (function 03
)
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p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
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e=re
pair&id=AUDI.B5.SU02.01.13

01-180

Function test: ABS/EDL warning light -K47-
Test step
VAG
1598
sockets Test of
Test
requirements
- Additional work
steps Specified value
Corrective action
8

Continuation: - Function of
ABS/EDL
warning light
-K47-. - Switch on
ignition ABS warning
light -K47- lights
up for two (2)
seconds and
then goes out.
Electrical Wiring Diagrams,
Troubleshooting & Component Locations - If ABS/EDL warning light does not come
on, check voltage of electrical system and
test wiring from terminal 21 of ABS control
module -J104- to instrument cluster for
short circuit to Ground (GND).
- The ABS/EDL warning lamp does not
switch off after 2 seconds. The red "brake
system malfunction" symbol lights up after
2 seconds. Check wire from terminal 21 of
ABS control module -J104- to instrument
cluster for short circuit to B+ and open
circuit.

Repair Manual, Electrical Equipment,
Repair Group 90.
- If vehicle voltage and wire from terminal
21 of ABS control module -J104- to
instrument cluster are OK there is a
malfunction in instrument cluster, LED or
bulb malfunctioning.
Pa
ge 35 of 66 Out
put Dia
gnostic Test Mode
(DTM
) (function 03
)
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play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.13

01-181

Function test: Red brake warning symbol
Test
step VAG
1598
sockets Test of
Test requirements
- Additional work stepsSpecified
value Corrective
action
9 - Function of red "brake
system malfunction"
symbol
Repair Manual, Brake System, Repair
Group 47

Brake fluid level is OK Function of ABS warning light -K47-
already checked in step 8. Multi-pin connector connected to ABS
control module -J104- and retainer catch
engaged. Switch on ignition
Test step 9: Continued on
next page.
Pa
ge 36 of 66 Out
put Dia
gnostic Test Mode
(DTM
) (function 03
)
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p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.13

01-182

Function test: Red brake warning symbol
Test step
VAG
1598/20
sockets Test of
Test requirements
- Additional work stepsSpecified value
Corrective action
9

Continuation: Function of red
"brake system
malfunction"
symbol - Connect VAG1551 scan
tool and select address
word 03
- For vehicles with
automatic transmission and
high-line instrument cluster,
depress the brake pedal
and select a driving gear. The ABS indicator lamp
and the red "brake system
malfunction" symbol light
up. If the traction control
indicator light is installed
and OK, it also lights up. Repair Manual,
Electrical Equipment, Repair Group 90; instrument cluster.

- Malfunction in
instrument cluster
Pa
ge 37 of 66 Out
put Dia
gnostic Test Mode
(DTM
) (function 03
)
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yp
e=re
pair&id=AUDI.B5.SU02.01.13

01-188

DTC
Possible cause
Corrective action
Printed output from
VAG1551 Scan Tool (ST)

00000
No malfunction recognized!
If this display appears,
process is concluded. No
DTCs are stored in DTC
memory.
If corresponding warning
lamps light up anyway, check
the following points:
Voltage supply for ABS control module -
J104- below 10.0 volts at a vehicle speed
less than 6 km/h. Open circuit in activation wire for ABS
warning light -K47- between ABS control
module (w/EDL) -J104- and instrument
cluster combination processor -J218-. - See section "Overview of indicator lamp
functions" page 01
-120
.
If no malfunction can be found, and there is still
a problem, there may be a mechanical
malfunction (e.g. solenoid valve sticking). - Expand troubleshooting to include
output Diagnostic Test Mode (DTM)
page 01
-149
and the "Electrical test"
page 01
-166
.
Pa
ge 43 of 66 Out
put Dia
gnostic Test Mode
(DTM
) (function 03
)
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yp
e=re
pair&id=AUDI.B5.SU02.01.13

01-197

DTC
Possible cause
Corrective action
Printed output from VAG1551 Scan Tool
(ST)

00532
Voltage supply
Signal too small

Notes:

This malfunction affects the voltage supply
of the control module.
This DTC is only stored, if the malfunction
occurs at a vehicle speed above 6 km/h.
As soon as vehicle voltage is within the
valid voltage range again, the ABS/EDL or
ASR system is switched back on and the
warning lights turn off.
Open circuit or contact resistance
too high between voltage supply
from terminal 15 hydraulic control
unit, terminal 15. Voltage jumps in vehicle system.
Electrical Wiring Diagrams,
Troubleshooting & Component
Locations
Electrical Wiring Diagrams,
Troubleshooting & Component
Locations
Repair Manual, Electrical
Equipment, Repair Group 27.
- Carry out "Electrical test", step
1 page 01
-166
.
- Locate and repair open circuit
in voltage supply. - Check Generator (GEN) and
Voltage Regulator (VR). - Check battery

Malfunction in hydraulic control unit- If no malfunctions can be
found in the voltage supply,
replace hydraulic control unit.
Pa
ge 57 of 66 Out
put Dia
gnostic Test Mode
(DTM
) (function 03
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.13