Ultrasonic Interior Monitoring, on Board Diagnostic (OBD)

General Notes

The ultrasonic interior monitoring is only available for vehicles equipped with an anti-theft alarm.

The addition of an ultrasonic interior monitoring system increases the level of protection offered by the anti-theft alarm.

The interior monitoring will set off the anti-theft alarm if an attempt is made to enter the vehicle via the side windows.

Operation
The ultrasonic interior monitoring comprises the following elements:
- Ultrasonic sensor module -G209-
- interior monitoring switch -E183-

The sensor module behind the interior light monitors the side windows and transmits the monitoring signal to the Central Locking Control Module.

If the monitoring signal changes, the Central Locking Control Module will trigger the alarm.

The Central Locking Control Module activates the indicator lamps next to the door locking knobs. These indicator lamps also serve as an additional means of diagnosing DTCs in the interior monitor.

The interior monitoring switch is used to switch off the interior monitoring manually when locking the vehicle. (The interior monitoring will be reactivated automatically the next time the vehicle is unlocked and locked again.)

See Owner's Manual

For all test possibilities, a system dependant waiting time of at least 30 seconds must be observed for a locked vehicle.

The ultrasonic sensor module has an extensive On Board Diagnostic (OBD) capability. If one of the systems components fails, a DTC is stored in the DTC memory of the control module. The malfunction can be identified using scan tools VAG 1551, or VAG 1552 and VAS 5051.