2000 AUDI A4 lock

01-109
The ultra-sound sensors in the right and left
upper B-pillar trims monitor the side windows and
send the monitoring signal to the control module
for ultra-sound sensors.
If the monitoring signal deviates from the norm,
the control module for interior monitoring
activates the alarm via the control module for the
anti-theft system.
In addition to the contact switches in the lock
units, glass break sensors in side windows as
well as the conductor loop in rear window, (only
for Avant), serve for securing the exterior of the
vehicle.
The control module for interior monitoring
activates the warning lamps next to the door
locking buttons. These warning lamps provide
further information regarding the interior
monitoring system.

Repair Manual, Electrical Equipment Interior monitoring can be manually shut off for
the duration of a door closing via the switch for
interior monitoring.

Owner's Manual
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01-112

On Board Diagnostic (OBD) functions
The following functions are possible:
01 - Check Control Module Versions page 01
-
123

02 - Check DTC Memory page 01
-113
.
03 - Output Diagnostic Test Mode page 01
-
124
.
05 - Erase DTC Memory page 01
-137
.
06 - End Output page 01
-139
.
07 - Code Control Module page 01
-131
.
08 - Read Measuring Value Block page 01
-
133
.
10 - Adaptation page 01
-135
.
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01-122

Interior monitoring function test


- Open side window approx. 10 cm.

- Switch ignition off and remove ignition key.

- Close all doors.

- Lock vehicle, which will set the anti-theft warning
system and the interior monitoring.

- Wait 30 seconds until all warning lamps in door
trim blink slowly in 2 second intervals (f = 0,5
Hz).

- Insert hand through window opening and hold in
proximity of sensor.

- If the interior monitoring is OK, alarm will be
triggered. An entry into DTC memory of control
module for central locking "1370; alarm via
interior monitoring" as well as to ultra-sound
control module "alarm via sensor for ATS, fl, fr,
rl, rr".

- Switch off alarm by unlocking vehicle.

-
DTC must be checked and erased in DTC
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01-124

Output Diagnostic Test Mode (scan tool
function 03)


Notes:

The Output Diagnostic Test Mode may only be
performed with the vehicle stationary and the
engine not running.
Any malfunctions identified by the Output
Diagnostic Test Mode must be checked and
repaired.

Performing output Diagnostic Test Mode
(DTM):
Rapid data transfer
HELPSelect function X
X

Indicated on display:
- Press buttons -0- and -3- to select "Output Diagnostic Test Mode
(DTM)" function 03.
Rapid data transfer
Q03 - Output Dia
gnostic Test Mode

Indicated on display:
The output DTM activates the following elements in sequence: - Press -Q- button to confirm input.
Warning lamps next to door locking button on driver-side or
passenger-side door
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01-125

Note:
No "ATS alarm" can be triggered via this output
Diagnostic Test Mode (DTM). To trigger a "ATS
alarm", perform the actuator test via the control
module for central locking page 01
-91
or a
function test page 01
-122
.
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01-126

Carrying out "Output Diagnostic Test Mode"
function 03

- Press buttons -0- and -3- to select "Output
Diagnostic Test Mode" function 03. Rapid data transfer
Q
03 - Output Dia
gnostic Test Mode

Indicated on display
- Press -Q- button to confirm input.
Output Diagnostic Test Mode Alarm S
ystem Indicator Li
ght -K95

Indicated on display
Warning lamps next to the door locking button at the driver-side or
passenger-side door are activated.
-
Press button.
Output Diagnostic Test Mode Create active alarm

Indicated on display
The control module sends an alarm signal to the anti-theft system control
module for a signal test page 01
-128
.
-
Press button.
Output Diagnostic Test Mode Volta
ge suppl
y wire

Indicated on display
The control module sends a constant voltage of 8 V to test the wiring
page 01
-129
.
-
Press button.
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01-128

Testing alarm signal

- Switch ignition off and remove ignition key.

- Connect VAG1551 Scan Tool (ST) ( page 01
-
1 ), and press buttons -4- and -5- to select "Int.
Monitoring" address word 45.

- Close all doors and open one side window.

- Lock vehicle by reaching through open window.
The anti-theft system horn confirms this, but
warning lamps do not light up.

- Wait 30 seconds until anti-theft system is
armed.

- Perform Output Diagnostic Test Mode ( page
01
-124
) and select control element test "Create
active alarm."

Notes:

It is also possible to test the alarm activation
signal without using the VAG1551 Scan Tool
(ST). To do this, carry out the first, third, fourth
and fifth procedure steps listed above.

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01-129

- Shut off alarm by unlocking vehicle.

- End Output Diagnostic Test Mode (DTM).

- Initiate On Board Diagnostic (OBD) for anti-theft
system.

- Erase DTC memory page 01
-137
.

Checking power supply wiring

- Remove both ultra-sound sensors.

Repair Manual, Body Interior, Repair Group
70, B
-pillar trim , removing and installing


- Disconnect electronic harness connectors.

- Perform Output Diagnostic Test Mode ( page
01
-124
) and select output test "Power supply
wiring."
Output Diagnostic Test Mode Power suppl
y wirin
g

Indicated on display
- Using multimeter (Fluke 83 or equivalent), measure voltage at wiring
harness connector between terminal 2 (B+) and terminal 3 (GND).
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