2000 AUDI A4 light

01-334

Function test: Red brake warning symbol
Test
step VAG
1598/20
sockets Test of
Test requirements
- Additional work stepsSpecified
value Corrective
action
18 - 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 17. Multi-pin connector connected to ABS
control module -J104- and retainer
catch engaged. Switch on ignition

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01-335
Continuation: Function test: Red brake warning symbol
Test
step VAG
1598/20
sockets Test of
Test requirements
- Additional work stepsSpecified value
Corrective action
18 - Function of red
"brake system
malfunction"
symbol
- Connect VAG1551 scan tool
and select address word 03
- For vehicles with automatic
transmission and instrument
cluster with DIS, 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 OK, it lights up as
well. Repair Manual,
Electrical Equipment, Repair Group 90; Instrument cluster
- Malfunction in
instrument cluster
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01-336

Function test: Traction control indicator light -K86-
Test
step VAG
1598/20
sockets Test of
Test requirements
- Additional work stepsSpecified
value Corrective
action
19 - 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.

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01-337
Continuation: Function test: Traction control indicator light -K86-
Test step
VAG
1598/20
sockets Test of
Test
requirements
- Additional work
steps Specified value
Corrective action
19

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 lights
continuously, test wiring from terminal
31 of ABS control module -J104- to
instrument cluster for short circuit to
Ground (GND).

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01-338
Continuation: Function test: Traction control indicator light -K86-
Test
step VAG
1598/20
sockets Test of
Test
requirements
- Additional work
steps Specified
value Corrective action
19 - Function of
traction control
indicator light -
K86-
Repair Manual, Electrical Equipment, Repair
Group 90; Instrument cluster
- Are voltage of electrical system OK and wiring
from terminal 31 of ABS control module -J104-
to instrument cluster intact? malfunction in
instrument cluster
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01-339

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
20 - Function of
ASR/ESP button Ignition switched off Function of traction control indicator light -
K86- already checked in step 19. Multi-pin connector connected to ABS control
module -J104- and retainer catch engaged.

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01-340
Continuation: Function test: Traction control button; set measurement range on VAG1526: 20 V =
Test
step VAG
1598/20
sockets Test of
Test
requirements
- Additional work
steps Specified value
Corrective action
20 - Function of
ASR/ESP
button
- Switch on ignition

- Press ASR/ESP
button Traction control
indicator light -K86-
lights up - Switch off ignition.
- Detach multi-pin connector from
ABS control module -J104- and
remove.

- Press ASR/ESP
button again Traction control
indicator light -K86-
goes out - Connect VAG1598/20 test box.

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01-352

Voltage measurement; set measurement range on VAG1526: 20 V =
Test
step VAG
1598/20
sockets Test of
Test requirements
- Additional work
steps Specified
value Corrective action
26 28 + 48 Function of brake
light switch -F- Ignition switched
off
- Check wire from terminal 28 to
Ground (GND).
Brake pedal not
depressed
- Operate brake
pedal. 0.0 to 1.0 V

10.0 to 14.5
V Electrical Wiring Diagrams,
Troubleshooting & Component
Locations
Repair Manual, Brake System,
Repair Group 45
- Check wiring from terminal 48 to
terminal 30 via fuse (10A).
- Adjust brake light switch -F-.

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