diagram AUDI A4 1995 B5 / 1.G Brakes Read Mesure Value Block User Guide

01-96

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
23 1 + 28
1 + 29 Voltage supply to ABS
control module -J104- via
terminal 15 Ignition
switched on. 10.5 to 14.5
V
Electrical Wiring Diagrams,
Troubleshooting & Component
Locations - Check wiring from terminals 28
and 29 to Ground (GND).
- Check wire from terminal 1 to
terminal 15.
Pa
ge 51 of 79 Read Measurin
g Value Block
(function 08
)
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yp
e=re
pair&id=AUDI.B5.SU02.01.8

01-107

Output on
printer of
VAG1551 Scan
Tool (ST) Possible cause
Corrective action
DTC
00301
ABS return flow
pump -V39 -
Open circuit in wire or contact resistance
in Ground (GND) connection or voltage
supply to ABS return flow pump -V39-.
Open circuit or short circuit to B+ or
Ground (GND) in wiring between ABS
return flow pump relay -J105- and the
ABS control module -J104-.
ABS return flow pump relay -J105-, ABS
return flow pump -V39- or hydraulic unit
malfunctioning. Electrical Wiring Diagrams, Troubleshooting &
Component Locations
Electrical Wiring Diagrams, Troubleshooting &
Component Locations - Locate and repair open circuit or contact resistance.
- Locate and repair open circuit or short circuit.- Check ABS return flow pump relay -J105-, ABS return
flow pump -V39- and ABS hydraulic unit -N55-, carry out
"electrical test", step 12+17 page 01
-68
, "Read
measuring value block", display group 2 page 01
-65
.
Pa
ge 66 of 79 Read Measurin
g Value Block
(function 08
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.8

01-108

Output on printer
of VAG1551 Scan
Tool (ST) Possible cause
Corrective action
DTC
00302
ABS solenoid
valve relay -J106-
Faulty wire connection or excessively large
contact resistance in Ground (GND)
connection to ABS solenoid valve relay -
J106-.
Open circuit or short circuit to B+ or Ground
(GND) in wiring between ABS solenoid
valve relay -J106- and the ABS control
module -J104-.
ABS solenoid valve relay -J106- or ABS
hydraulic unit -N55- malfunctioning. Electrical Wiring Diagrams, Troubleshooting &
Component Locations
Electrical Wiring Diagrams, Troubleshooting &
Component Locations - Check Ground (GND) connection for contact
resistance and faulty wiring.
- Locate and repair open circuit or short circuit.- Check ABS solenoid valve relay -J106- and ABS
hydraulic unit, carry out "electrical test", step 11
page 01
-68
, "Read measuring value block", display
group 2 page 01
-65
.
Pa
ge 67 of 79 Read Measurin
g Value Block
(function 08
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.8

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
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.8

01-110

Output on printer of
VAG1551 Scan Tool
(ST) Possible cause
Corrective action
DTC
00529
Wheel speed information
missing
No signal

This malfunction only
occurs if vehicle is
equipped with ASR.
Open circuit or short circuit to B+ or
Ground (GND) in wiring between ABS
control module -J104- and Engine
Control Module (ECM).
Electrical Wiring Diagrams, Troubleshooting &
Component Locations - "Read measuring value block", display group 3
page 01
-67
.
- Locate and repair open circuit or short circuit.


Engine Control Module (ECM)
malfunctioning. - If the tachometer in the instrument cluster is
malfunctioning and no malfunctions can be found in
the wiring, the Engine Control Module (ECM) is
malfunctioning and must be replaced.

ABS control module -J104-
malfunctioning - If the tachometer in the instrument cluster
functions properly and no malfunctions can be
found in the wiring, the ABS control module
(w/EDL) -J104- is malfunctioning and must be
replaced.
Pa
ge 69 of 79 Read Measurin
g Value Block
(function 08
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.8

01-111

Output on printer of VAG1551 Scan Tool
(ST) Possible cause
Corrective action
DTC
00532
Voltage supply
Signal too small

Notes:

This malfunction affects the voltage supply
of the control module.
This DTC is only stored, if the malfunction
occurs at a vehicle speed above 6 km/h.
As soon as vehicle voltage is within the
valid voltage range again, the ABS,
ABS/EDL or ASR system is switched back
on and the warning lights turn off.
Open circuit or resistance too high
between voltage supply of terminal 15
and ABS control module -J104-
(terminal 1). Voltage jumps in vehicle system.Battery malfunctioning.
Electrical Wiring Diagrams,
Troubleshooting &
Component Locations
Repair Manual, Electrical
Equipment, Repair Group 90; Instrument cluster
- Carry out "Electrical test",
step 23 page 01-68
.
- Locate and repair open
circuit or contact resistance.
- Check Generator (GEN.)
and Voltage Regulator (VR). - Check battery
Pa
ge 70 of 79 Read Measurin
g Value Block
(function 08
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.8

01-113

Output on printer of
VAG1551 Scan Tool (ST) Possible cause
Corrective action
DTC
00623
ABS / transmission electrical
connection Manual transmission:

This malfunction only
occurs if vehicle is
equipped with ASR.
ABS/EDL/ASR control module -J104- incorrectly
coded. Short circuit to B+ at terminal 45
Electrical Wiring Diagrams,
Troubleshooting & Component
Locations - Check coding of
ABS/EDL/ASR control module -
J104- page 01
-56
.
- Locate and repair short circuit.

Automatic transmission:

Open circuit or short circuit to Ground (GND) in wiring
between ABS/EDL/ASR control module -J104- and
Transmission Control Module (TCM) -J217-. ABS/EDL/ASR control module -J104- incorrectly
coded.
Electrical Wiring Diagrams,
Troubleshooting & Component
Locations - Check coding of
ABS/EDL/ASR control module -
J104- page 01
-56
.
- Locate and repair open circuit
or short circuit.
Pa
ge 72 of 79 Read Measurin
g Value Block
(function 08
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.8

01-116

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

00646
ABS-ASR motor electrical connection 1
Open circuit or short circuit to B+ or Ground
(GND) in wiring between ABS control module
-J104- terminal 18 and Engine Control
Module (ECM).
Electrical Wiring
Diagrams, Troubleshooting &
Component Locations - Locate and repair open
circuit or short circuit.
Note:
The following signals are sent from the
ABS control module (w/EDL) -J104- to the
Engine Control Module (ECM) via this
connection:

MMD signal (Masked Misfire
Diagnostic) for On Board Diagnostic
(OBD)
SET signal (Specified Engine Torque)




ABS control module -J104- malfunctioningEngine Control Module (ECM)
malfunctioning.



- Replace ABS control
module (w/EDL) -J104-.
- Replace Engine Control
Module (ECM).
Pa
ge 75 of 79 Read Measurin
g Value Block
(function 08
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.8

01-117

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

00647
ABS-ASR motor electrical connection 2
Open circuit or short circuit to B+ or Ground
(GND) in wiring between ABS control module -
J104- terminal 47 and Engine Control Module
(ECM).
Electrical Wiring Diagrams,
Troubleshooting &
Component Locations - "Read measuring value
block", display group 3
page 01
-67
.
- Locate and repair open
circuit or short circuit.
Note:
The following signal is sent from the
Engine Control Module (ECM) to the
ABS control module (w/EDL) -J104- via
this connection:

AET signal (Actual Engine Torque)





Engine Control Module (ECM) malfunctioning.





- Replace Engine Control
Module (ECM).
Pa
ge 76 of 79 Read Measurin
g Value Block
(function 08
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.8

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
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.8