1997 AUDI A4 brake

24-185

Brake light switch -F and brake pedal
switch -F47, checking


- Connect vehicle diagnostic, testing and
information system VAS 5051 or VAG1551 scan
tool and select engine electronics control
module by entering address word "01" Page
01
-9 .
When doing this the ignition must be switched
on. Rapid data transfer
HELP
Select function XX

Indicated on display
- Press buttons -0- and -8- to select function "Read Measuring Value
Block" and confirm entry with -Q- button.
Read Measurin
g Value Block
Input displa
y group number XXX

Indicated on display
- Press buttons -0-, -6- and -6- to select "display group number 066" and
confirm entry with -Q- button.
Pa
ge 8 of 37 Additional si
gnals, checkin
g
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU04.24.6

24-186

Read Measuring Value Block 66
1
2
3
4

Indicated on display
- Observe brake light/brake pedal switch in display field 2.

Display fields

1 2 3 4
Display Group 066: Signals to engine control module
Display xxx km/h
X X X X xxx km/h 0 0 0 0
Indicates Actual speed
Switch positions Specified speed Switch positions
Work
range
XX00
XX11

Specified value
XX00
Brake pedal not depressed

XX11
Brake pedal depressed
Note
Value:
X = insignificant
The switch points are offset
Pa
ge 9 of 37 Additional si
gnals, checkin
g
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU04.24.6

24-187
If display does not appear as described:

Check switch

- Remove storage compartment on driver's
side.

Repair Manual, Body Interior, Repair Group
68


- Disconnect harness connector on brake
light/brake pedal switch.

- Connect hand-held multimeter for resistance
measurement between terminals 1 and 2.

Note:
The connector slots are marked on the back side
of the connector.
Pa
ge 10 of 37 Additional si
gnals, checkin
g
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU04.24.6

24-188


Specified value: (no continuity)

- Depress brake pedal.


Specified value: approx.: 0

- Connect hand-held multimeter for resistance
measurement between terminals 3 and 4.


Specified value: approx.: 0

- Depress brake pedal.


Specified value: (no continuity)
If specifications are not obtained:

- Check adjustment or replace brake light/brake
pedal switch.
Pa
ge 11 of 37 Additional si
gnals, checkin
g
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU04.24.6