SSANGYONG REXTON 2006.09 Manual page 494

5) SDM (Sensing and Diagnostic Module)
1. The airbag system consists of the module section (driver, passenger and side), seat belt
section and SDM.
2. The SDM has no user-serviceable parts and monitors the system components continuously.
The SDM also records any faults which are discovered.
3. The SDM allows the fault codes to be retrieved with a scan tool and illuminates a warning
lamp that alerts the driver to any faults.
The SDM located on floor beneath the floor console assembly. The SDM performs the following
functions:
Impact decision processor function.
·
Determine the airbag deployment through the impact signal of the accelerometer sensor
and the safety sensor.
Malfunction detection and recording any faults that are detected.
·
Monitor the supplemental restrain system electrical components and set a diagnostic trouble
code when malfunction is detected.
Display airbag fault codes Display airbag fault codes and system status information when
·
connected to a scan tool.
Self-diagnosis function Illuminate the AIRBAG indicator to alert the driver to any fault.
·
Power supply function Provide a reserve power source to deploy the airbags and
·
pretensioners if an accident has disabled the normal power source.
6) Acceleromenter sensor
The accelerometer sensor electronically represents the acceleration or deceleration of the
vehicle during a frontal impact.
In this electronic representation, the electrical signal is proportional to the acceleration or
deceleration of the vehicle.
7) Safety sensor
The safety sensor is safety device made up of a dualcontact, electro-mechanical switch that:
1. Acts independently of the electronic components.
2. Connects the acceleration sensor in series in order to make up for the weak points in the
current electronic sensor.
8) Micro controller
This device receives the impact signal from the sensor for vehicle impact and identifies whether
the current condition is necessary for airbag deployment or not. And then the controller sends
the specified currents to the airbag ignition circuit as needed.
This device always monitors the airbag system in conduction with the diagnostic circuit. When it
is detected any problem, it illuminates the airbag warning indicator to inform driver of the fault
and stores the fault information.
05-13
8810-05
AIR BAG AND SEAT BELT
REXTON 2006.09