brake AUDI A4 1998 B5 / 1.G Brakes Read Mesure Value Block Owner's Manual

01-90

Function test: Red brake warning symbol
Test
step VAG
1598/20
sockets Test of
Test requirements
- Additional work stepsSpecified
value Corrective
action
20 - 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 19. Multi-pin connector connected to ABS
control module -J104- and retainer
catch engaged. Switch on ignition
Test step 20: Continued on
next page.
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g Value Block
(function 08
)
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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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01-97
Diagnostic Trouble Code (DTC) table

Notes:

Connect the VAG1551 Scan Tool (ST) and select address word 03 "Brake Electronics".
Check the control module version page 01
-52
and press the button.
Press buttons -0- and -2- to select "Check DTC Memory" function 02. Press -Q- button to confirm input.
Notes:
Each malfunction is assigned a 5-digit Diagnostic Trouble Code (DTC). The DTC is located in the left column of the DTC
table. If you have switched the printer on by pressing the "PRINT" button, the VAG1551 scan tool (ST) prints the message
identifying the malfunction and the DTC. Otherwise, DTCs are not displayed by the VAG1551 scan tool.
The contents of DTC memory remain stored until memory is erased, page 01
-15
.
Sporadically occurring malfunctions are identified via indication of "/SP" on the right-hand side of the display.
Static malfunctions that cannot be detected when the vehicle is stationary are also identified with "/SP" if the ignition has
been switched off and then on again.
The following DTC table includes all the DTCs that can be stored by the ABS control module -J104- and displayed and
printed out by the VAS5051 tester or VAG1551 scan tool. Malfunctions are listed by DTC number.
Pa
ge 52 of 79 Read Measurin
g Value Block
(function 08
)
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01-103

Output on printer of
VAG1551 Scan Tool
(ST) Possible cause
Corrective action
DTC
00283
Left front ABS wheel
speed sensor -G47-
or:
ABS wheel speed sensor rotor dirty or
damaged.
Excessive wheel bearing play.
Left rear ABS wheel speed sensor -G47-
installed incorrectly.
ABS wheel speed sensor -G47-
malfunctioning.
Short circuit to Ground (GND). Repair Manual, Brake System, Repair Group 45

Repair Manual, Suspension, Wheels, Steering,
Repair Group 40

Repair Manual, Brake System, Repair Group 45
- Check rotor, clean or replace
- Replace wheel bearing- Check installation of ABS wheel speed sensor.- "Read measuring value block" display group 1
page 01
-63
.
- Carry out "Electrical test", step 7 page 01
-68
.
- If neither the "Read measuring value block"
function nor the "electrical test" reveal any
malfunctions, check all wiring and harness
connectors for loose contacts.
Left front ABS wheel
speed sensor -G47-
Incorrect control module version.- Check control module version page 01
-52
.
Pa
ge 58 of 79 Read Measurin
g Value Block
(function 08
)
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e=re
pair&id=AUDI.B5.SU02.01.8

01-104

Output on printer of
VAG1551 Scan Tool
(ST) Possible cause
Corrective action
DTC
00285
Right front ABS
wheel speed sensor -
G45-
or:
ABS wheel speed sensor rotor dirty or
damaged.
Excessive wheel bearing play.
Left rear ABS wheel speed sensor -G45-
installed incorrectly.
ABS wheel speed sensor -G45-
malfunctioning.
Short circuit to Ground (GND). Repair Manual, Brake System, Repair Group 45

Repair Manual, Suspension, Wheels, Steering,
Repair Group 40

Repair Manual, Brake System, Repair Group 45
- Check rotor, clean or replace
- Replace wheel bearing- Check installation of ABS wheel speed sensor.- "Read measuring value block", display group 1
page 01
-63
.
- Carry out "Electrical test", step 8 page 01
-68
.
- If neither the "Read measuring value block"
function nor the "electrical test" reveal any
malfunctions, check all wiring and harness
connectors for loose contacts.
Right front ABS
wheel speed sensor -
Incorrect control module version.- Check control module version page 01
-52
.
Pa
ge 60 of 79 Read Measurin
g Value Block
(function 08
)
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pair&id=AUDI.B5.SU02.01.8

01-105

Output on printer of
VAG1551 Scan Tool
(ST) Possible cause
Corrective action
DTC
00287
Right rear ABS
wheel speed sensor -
G44-
or:
ABS wheel speed sensor rotor dirty or
damaged.
Excessive wheel bearing play.
Left rear ABS wheel speed sensor -G44-
installed incorrectly.
ABS wheel speed sensor -G44-
malfunctioning.
Short circuit to Ground (GND). Repair Manual, Brake System, Repair Group 45

Repair Manual, Suspension, Wheels, Steering,
Repair Group 42

Repair Manual, Brake System, Repair Group 45
- Check rotor, clean or replace
- Replace wheel bearing- Check installation of ABS wheel speed sensor.- "Read measuring value block", display group 1
page 01
-63
.
- Carry out "Electrical test", step 10 page 01
-68
.
Right rear ABS
wheel speed sensor -
G44-
Open circuit/short
circuit to B+
Open circuit or short circuit to B+ in wiring
between ABS wheel speed sensor -G44-
and ABS control module -J104-. - If neither the "Read measuring value block"
function nor the "electrical test" reveal any
malfunctions, check all wiring and harness
connectors for loose contacts.
- If no problems are found after implementing the
Pa
ge 62 of 79 Read Measurin
g Value Block
(function 08
)
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pair&id=AUDI.B5.SU02.01.8

01-106

Output on printer of
VAG1551 Scan Tool
(ST) Possible cause
Corrective action
DTC
00290
Left rear ABS wheel
speed sensor -G46-
or:
ABS wheel speed sensor rotor dirty or
damaged.
Excessive wheel bearing play.
Left rear ABS wheel speed sensor -G46-
installed incorrectly.
ABS wheel speed sensor -G46-
malfunctioning.
Short circuit to Ground (GND). Repair Manual, Brake System, Repair Group 45

Repair Manual, Suspension, Wheels, Steering,
Repair Group 42

Repair Manual, Brake System, Repair Group 45
- Check rotor, clean or replace
- Replace wheel bearing- Check installation of ABS wheel speed sensor.- "Read measuring value block", display group 1
page 01
-63
.
- Carry out "Electrical test", step 9 page 01
-68
.
Left rear ABS wheel
speed sensor -G46-
Open circuit/short
circuit to B+
Open circuit or short circuit to B+ in wiring
between ABS wheel speed sensor -G46-
and ABS control module -J104-. - If neither the "Read measuring value block"
function nor the "electrical test" reveal any
malfunctions, check all wiring and harness
connectors for loose contacts.
- If no problems are found after implementing the
Pa
ge 64 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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01-112

Output on printer of
VAG1551 Scan Tool (ST) Possible cause
Corrective action
DTC
00597
Varying wheel speed impulse
ABS wheel speed sensor rotor dirty or
damaged.
Repair Manual, Brake System,
Repair Group 45
- Check rotor.

Excessive wheel bearing play.
Repair Manual, Brake System,
Repair Group 45
- Check wheel bearing

ABS wheel speed sensors -G44-, -G45-, -G46-,
and -G47- installed incorrectly. ABS wheel speed sensors -G44-, -G45-, -G46-,
and -G47- malfunctioning Repair Manual, Brake System,
Repair Group 45
- Check ABS wheel speed sensors.
- Carry out "electrical test", steps 7
through 10 page 01
-68
.

Wheel or tire sizes not the same on all four
wheels. - Check wheel and tire sizes.
Pa
ge 71 of 79 Read Measurin
g Value Block
(function 08
)
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01-118

Output on printer of VAG1551 Scan Tool (ST)
Possible cause
Corrective action
DTC

00668
Vehicle voltage terminal 30, open circuit

When equipped with EDL, the ABS control module
-J104- requires this voltage supply after ignition is
switched off in order to calculate the drop in brake
temperature; page 01
-39
.
Voltage supply to ABS control
module (w/EDL) -J104- (terminal
50) has an open circuit or short
circuit to Ground (GND). Electrical Wiring
Diagrams, Troubleshooting
& Component Locations - Check wire connection.
Pa
ge 78 of 79 Read Measurin
g Value Block
(function 08
)
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pair&id=AUDI.B5.SU02.01.8