User Manual

Date: 2011-11-04
No.:
Hella KGaA Hueck & Co.
59552 Lippstadt
Subject:
LCA (Lane Change Assist), Gen. 1.7
SWA (Spurwechselassistent), Gen. 1.7
Page 2 of 5
Signed by: Checked by:
Hella 3399DE (2000
-05)
Vertraulich. Weitergabe sowie Verwertung und Mitteilung des Inhalts ist nur mit unserer ausdrücklichen Genehmigung gestattet. Alle Rechte vorbehalten.
LCA System Architecture
The LCA system consists of two radar sensor units which are mounted behind the rear bumper in the left
and right rear corners of a car so that the rear and the sides of the car can be observed.
One of the units is the main control unit "master = SWA SG1" and the other is the "slave = SWA SG2".
For Mazda the units are the main control unit "master = MODULE-L/C/A RH " and the other is the
"slave = MODULE-L/C/A LH ".
The two units interchange data between each other via the sensor CAN-bus.
The master interchanges data with other electronic control units of the vehicle via the vehicle CAN-bus.
Both units incorporate a DSP-board and a Radar Frequency Unit (Radio Front End) to perform the radar
signal processing.
Only the DSP-board of the master incorporates a microprocessor which handles the
communication to the vehicle CAN-bus.
An on-off-tipper to activate and de-activate the system is connected to the DSP-board of the master unit.
In the car a respective status lamp which indicates whether the system is activated or de-activated is
connected to the DSP-board of the master unit.
Warning lamps for the left and the right side are connected to the DSP-board of the slave unit.