Anti-theft/tilt system control unit J. Audi A3 ’04

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Control Units

Anti-theft/tilt system control unit J529

On the Audi A3 ’04, the anti-theft/tilt system control unit J529 is a self-contained control unit incorporating a semi-conductor sensor for determining vehicle tilt.

This is located beneath the dash panel on the right.

Design and operation are described in Self

Study Programme 287 (Electrical

Components of Audi A8’03).

The internal design of the control unit is identical.

To ensure reliable functioning, modifications had to be made to the housing on account of a different installation position.

The anti-theft/tilt system control unit J529 is actuated by the convenience system central control unit J393 via the LIN bus.

312_054

Deactivation button for vehicle inclination sender E360

The anti-theft/tilt system control unit J529 can, like the interior monitor, be deactivated before locking the vehicle.

312_063

Self-diagnosis

Address word 46 also addresses the LIN users connected to the convenience system central control unit J393. These respond with their control unit identification.

Self-diagnosis is implemented via the diagnosis CAN to the data bus diagnostic interface J533 and via the convenience CAN to the convenience system central control unit J393.

The sensitivity level of the anti-theft/tilt system control unit J529 can be adjusted if required.

The sensor is calibrated at the factory to

1° accuracy = 100 %.

It can be reduced in five stages from

1° to 1.5° = 50 % sensitivity.

Reducing sensitivity is only intended to be peformed by service personnel for dealing with any problems reported.

312_067

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