wiring AUDI A4 1998 B5 / 1.G Brakes ABS EDL ASR Bosch 5.3 Workshop Manual

01-121

ABS/EDL
-K47- Brake
system ASR

-
K86-
1) Reasons why the indicator lamps light up

If an irregularity occurs during the self test after ignition is switched on, and the
warning lamps -K47- and -K86- do not light up for 2 seconds, check the warning lamps;
"Electrical test" page 01
-166
, carry out test steps 8 and 10. The possible causes are
as follows:
Electrical Wiring Diagrams, Troubleshooting & Component Locations
Repair Manual, Electrical Equipment, Repair Group 27, Battery

The battery voltage is insufficient. None of the lamps in the instrument cluster light up.
Check the battery.





X 1)
The ABS/EDL warning light does not light up during the self-test. There is a short to
Ground (GND) in the wiring that controls the ABS/EDL warning light between terminal 21
of the ABS control module -J104- and the instrument cluster. This malfunction does not
affect activation of the ABS warning light. For vehicles equipped with ASR, the traction
control indicator lamp lights up during the self-test; "Electrical test" page 01
-166
, carry
out test step 8.

X


The vehicle is equipped with ASR. The ABS/EDL warning light lights up during the self-
test. The traction control indicator light does not light up during the self-test "Electrical
test" page 01
-166
, carry out test step 10.
1) The traction control indicator light is only available in vehicles equipped with ASR.
Pa
ge 3 of 11 ABS/EDL/ASR Bosch 5.3
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.9

01-126

ABS/EDL
-K47- Brake
system ASR

-K86-
1) Reasons why the indicator lamps light up






X1) The vehicle is equipped with ASR:
There is a malfunction that affects only the ASR system. The ABS and EDL systems are
not deactivated. Check DTC memory page 01
-187

ASR is switched off via the traction control button. If the traction control indicator light
does not light up in this case, check the switch and the indicator light, carry out the
"Electrical test", steps 10 and 11 page 01
-166
.
ASR is in adjustment mode. The traction control indicator light blinks 3 times per second.Short circuit to B+ in the traction control button: The traction control indicator light
switches off five minutes after ignition is switched on. The lamp remains constantly lit after ignition is switched on, but none of the above
mentioned conditions are true. There is a short to Ground (GND) in the wiring that
controls the traction control indicator light between terminal 20 of the ABS control module
-J104- and the instrument cluster.



There is an irregularity present or a complaint has been made. The indicator lamps go
on during the self-test and then go out. The possible causes are as follows: The DTC "Brake light switch -F-" is stored in DTC memory , check DTC memory page 01
-187
.
The DTC "ABS/instrument cluster electrical connection" is stored in DTC memory , check
DTC memory page 01
-187
.
Pa
ge 9 of 11 ABS/EDL/ASR Bosch 5.3
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.9