light AUDI A4 1995 B5 / 1.G Brakes Read Mesure Value Block User Guide

01-91

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

Continuation: Function of red
"brake system
malfunction"
symbol - For vehicles with
automatic transmission and
high-line instrument cluster,
depress the brake pedal
and select a driving gear. The ABS/EDL 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 46 of 79 Read Measurin
g Value Block
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)
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01-92

Function test: Traction control indicator light -K86-. This is only installed if vehicle is equipped with ASR.
Test
step VAG
1598/20
sockets Test of
Test requirements
- Additional work stepsSpecified
value Corrective
action
21 - Function of traction
control indicator light -
K86- 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 21: Continued on
next page.
Pa
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g Value Block
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)
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01-93

Function test: Traction control indicator light -K86-. This is only installed if vehicle is equipped with ASR.
Test step
VAG
1598/20
sockets Test of
Test
requirements
- Additional work
steps Specified value
Corrective action
21

Continuation: - Function of
traction
control
indicator light
-K86- - Switch on
ignition Traction control
indicator light -K86-
comes on for two
(2) seconds and
then goes out.
Electrical Wiring Diagrams,
Troubleshooting & Component
Locations - If traction control indicator light does
not light up, check vehicle voltage and
wire from terminal 31 of ABS control
module -J104- to instrument cluster for
short circuit to B+ and open circuit.
- If traction control indicator lamp
remains continuously lit, check wire
from terminal 31 of ABS control
module -J104- to instrument cluster for
short circuit to Ground (GND).

Repair Manual, Electrical
Equipment, Repair Group 90; Instrument cluster
- Are both the vehicle voltage and the
wiring from terminal 31 of ABS control
module -J104- to the instrument
cluster OK? Malfunction in
instrument cluster.
Pa
ge 48 of 79 Read Measurin
g Value Block
(function 08
)
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01-94

Function test: Traction control button; set measurement range on VAG1526: 20 V =
Test
step VAG
1598/20
sockets Test of
Test requirements
- Additional work stepsSpecified value
Corrective action
22 - Function of
traction control
button Ignition switched off Function of traction control
indicator light -K86- was
already checked in step 21. Multi-pin connector connected
to ABS control module -J104-
and retainer catch engaged.
- Switch on ignition

- Press traction control buttonTraction control
indicator light -
K86- lights up - Switch off ignition.
- Detach multi-pin
connector from ABS control
module -J104- and remove.

- Press traction control button
again Traction control
indicator light -
K86- goes out. - Connect VAG1598/20 test
box.
Test step 22: Continued on next page.
Pa
ge 49 of 79 Read Measurin
g Value Block
(function 08
)
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01-98
Diagnostic Trouble Code (DTC) table Output on printer of VAG1551
Scan Tool (ST) Possible cause
Corrective action
DTC

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 10.5 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"
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 "Electrical test", function
test page 01
-68
.
Pa
ge 53 of 79 Read Measurin
g Value Block
(function 08
)
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01-109

Output on printer of
VAG1551 Scan Tool
(ST) Possible cause
Corrective action
DTC
00526
Brake light switch -F-
FWD:
Open circuit
Both brake lights -M9- (left) and -M10- (right)
malfunctioning or ABS control module -J104-
malfunctioning.
Wire from brake lights to control module faulty. Electrical Wiring Diagrams,
Troubleshooting & Component
Locations - Locate and repair open circuit or
short circuit.
- Replace bulbs.
- Check brake light switch, "Read
measuring value block", display
group 2 page 01
-65
.
AWD:
Implausible signal
Open circuit or short circuit to B+ or Ground (GND) in
wiring between brake light switch and the bulbs for brake
lights -M9- (left), -M10- (right) or ABS control module -
J104-.
Bulb for left brake light -M9- or right brake light -M10-
malfunctioning.
Brake light switch malfunctioning.
Pa
ge 68 of 79 Read Measurin
g Value Block
(function 08
)
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01-111

Output on printer of VAG1551 Scan Tool
(ST) Possible cause
Corrective action
DTC
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,
ABS/EDL or ASR system is switched back
on and the warning lights turn off.
Open circuit or resistance too high
between voltage supply of terminal 15
and ABS control module -J104-
(terminal 1). Voltage jumps in vehicle system.Battery malfunctioning.
Electrical Wiring Diagrams,
Troubleshooting &
Component Locations
Repair Manual, Electrical
Equipment, Repair Group 90; Instrument cluster
- Carry out "Electrical test",
step 23 page 01-68
.
- Locate and repair open
circuit or contact resistance.
- Check Generator (GEN.)
and Voltage Regulator (VR). - Check battery
Pa
ge 70 of 79 Read Measurin
g Value Block
(function 08
)
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e=re
pair&id=AUDI.B5.SU02.01.8