AUDI A4 1999 B5 / 1.G Brakes ESP Bosch 5.3 User Guide

01-225

"Brake
malfunction"
symbol ABS/EDL
warning
light
-K47- Traction
control
indicator light
-K86- Possible reasons why the indicator lamps light up
off off off

There is an irregularity. The indicator lamps go on during the self-
test and then go out. The possible causes are as follows: The voltage supply for the ABS control module -J104- is between
7 and 10 volts and the vehicle speed is < 6 km/h. Carry out
"Electrical test", step 21. The DTC "01119 gear recognition signal" is stored in the DTC
memory. Check DTC memory page 01
-356
.
The signal indicating whether the parking brake is set or released
is not being sent to the ABS control module -J104-. "Read
measuring value block" function 08 page 01
-256
, display group
2 page 01
-261
.
Check the brake light switch -F-. "Read measuring value block"
function 08 page 01
-256
, display group 2 page 01
-261
.
Check the zero position of the steering angle sensor -G85-. "Read
measuring value block" function 08 page 01
-256
, display group
5 page 01
-270
.
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01-226

"Brake
malfunction"
symbol ABS/EDL
warning
light
-K47- Traction
control
indicator
light
-K86- Possible reasons why the indicator lamps light up
off on on
Also observe notes on the next page.
The indicator lights did not go out after the self-test. However, the red
"brake system malfunction" symbol did not go on. The On Board
Diagnostic recognized a malfunction, which deactivated the
ABS/EDL/ASR/ESP. However, the "Electronic Brake Distribution" (EBD)
remained activated. Check DTC memory page 01
-356
.
The ESP driving test may have been activated page 01
-250
Check the voltage supply for the red "brake system malfunction" symbol.
Carry out "Electrical test", step 18. If the control is malfunctioning, see
the next example for lighted indicator lights. During the last drive, a dynamic malfunction of the wheel speed sensor
occurred or a malfunction in the ABS return flow pump -V39- occurred.
In this case, the indicator lights automatically go off after the vehicle is
started, and has exceeded a speed of 2.75 km/h or a check of the return
flow pump indicated it is OK.
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01-227

"Brake
malfunction"
symbol ABS/EDL
warning
light
-K47- Traction
control
indicator
light
-K86- Possible reasons why the indicator lamps light up
off on on
Continuation from preceding page.
A DTC is stored in the DTC memory the first time the vehicle exceeds 6
km/h, if the voltage supply to the ABS control module -J104- is between
7 and 10 volts and the indicator lights go on. If during the drive, the
voltage supply to the ABS control module -J104- exceeds 10 volts, the
indicator light go out. The DTC remains in the memory. "Check DTC
memory" page 01
-356
.
off on off
The ESP driving test was not completed; page 01
-250
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01-228

"Brake
malfunction"
symbol ABS/EDL
warning
light
-K47- Traction
control
indicator
light
-K86- Possible reasons why the indicator lamps light up
on on on The ABS and traction control indicator lights go on, and three seconds after
the ignition is switched on the red "brake system malfunction" symbol goes
on.
WARNING!
The brake system is only partially functional. Because brake pressure at
the rear wheels is no longer regulated vie Electronic Brake Distribution
(EBD), the rear wheels can lock even during light braking (excessive
braking at rear axle). This can cause the rear of the vehicle to break
loose and thereby cause and accident.
Note: For vehicles with automatic transmission, the red "brake system
malfunction" symbol does not appear immediately after the ignition is
switched on. Instead, the note "Depress brake pedal before engaging gear"
appears in the display. Press the brake pedal and select a gear. The red
brake warning light appears, if the light control is working properly.
A malfunction deactivated the ABS/EDL, ASR/ESP and the "Electronic
Brake Distribution" (EBD).Check DTC memory page 01
-356
. Pa
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01-229

"Brake
malfunction"
symbol ABS/EDL
warning
light
-K47- Traction
control
indicator light
-K86- Possible reasons why the indicator lamps light up
off off on
The traction control indicator light does not turn off after the self-
test.


There is a malfunction that only affects the traction control. The
ABS/EDL and EBD systems are not deactivated. Check DTC
memory page 01
-356
.
Traction control has been switched off using 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 19 and 20. Short circuit to B+ in the ASR/ESP button: The traction control
indicator light goes out five minutes after the ignition is switched on.
Carry out "electrical test", step 20. There is a short to Ground (GND) in the wiring that controls the
traction control indicator light between terminal 31 of the ABS
control module -J104- and the instrument cluster. Carry out
"electrical test", step 19.
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01-230

"Brake
malfunction"
symbol ABS/EDL
warning
light
-K47- Traction
control
indicator light
-K86- Possible reasons why the indicator lamps light up
on on off
No DTCs are stored in DTC memory. The ABS and traction control
warning lights do not go out after the self-test, and three seconds
after the ignition is switched on the red "brake system malfunction"
symbol goes on. There is an open circuit or short circuit to B+ in the wiring that
controls the traction control indicator light between terminal 32 of
the ABS control module -J104- and the instrument cluster; carry
out "Electrical test" step 17. Voltage supply for control module less than 7 volts; carry out
"Electrical test" step 21.
on off off
No DTCs are stored in DTC memory. The red "brake system
malfunction" symbol remains lit after the ignition is switched on.
The brake fluid level is too lowMalfunction in instrument cluster: Carry out "Electrical test", step
18.
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01-231

Check Control Module Version (function
01)


- Connect VAS5051 tester or VAG1551 scan tool
and select the address word 03 "Brake
Electronics".

Note:
The following explanation of how to perform On
Board Diagnostic (OBD) is based on use of the
VAG1551 scan tool. Performing On Board
Diagnostic (OBD) using the VAS5051 tester is
similar.

- Advance through program sequence by pressing
the button.
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01-232

Rapid data transfer
HELP
Select function XX

Indicated on display:
Note: - Press buttons -0- and -1- to select "Check Control Module Version" 01.
Press -Q- button to confirm input.
For allocation of ABS control module -J104-, also refer to parts
catalog.
8D0 907 389E 1
) ABS/ESP AWD 2
) D01 3
)
Codin
g 06397
WSC xxxxx

Indicated on display:
Index
1): ABS control module Part. No. including control module index
Index 2): Indicates system identification.
Index 3): Indicates hardware and software status
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01-233
Control module versions System identification
Prod.
No.:
1) Control
module part
no.: Index
Coding
Data
transmission
via: CAN terminal resistance
in control module:
All Wheel Drive (AWD);
ABS/ESP 1AT: 4B0 907 389 - coding not
possible CAN-bus
120
Front Wheel Drive
(FWD); ABS/ESP 1AT: 8D0 907 389 - Can be
coded CAN-bus
120 All Wheel Drive (AWD);
ABS/ESP 1AT: 8D0 907 389 A Can be
coded CAN-bus
120 Front Wheel Drive
(FWD); ABS/ESP 1AT: 8D0 907 389 D Can be
coded CAN-bus
2600 All Wheel Drive (AWD);
ABS/ESP 1AT: 8D0 907 389 E Can be
coded CAN-bus
2600 1) This letter code is the production number allocated to each equipment version. The production number can be derived from
the vehicle data plate. The vehicle data plate is attached to the vehicle in the spare tire well.
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01-234

Code Control Module (function 07)


After installing a new ABS control module
(w/EDL) -J104- or a new steering angle sensor
-G85-, the ESP system must be coded again.
After the coding, the steering angle sensor
must be calibrated.
The coding of the ESP control module is used for
adaptation of the control module to the vehicle.
Coding is only possible if a dealership number is
stored in the VAG1551 scan tool.

Note:
If the control module is coded with code 00000 or
with a code that does not match the vehicle, the
ABS warning light -K47- and the traction control
indicator light -K86- remain continuously lit, and
the DTC 01044 - Control module incorrectly
coded - is stored in DTC memory of the control
module.
Before the control module can be coded, "Login
Procedure" function 11 must be successfully
carried out using the VAG1551/1552 scan tool.
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