Suzuki Baleno Manual page 1107

1. SDM
2. SDM plate
The Sensing and Diagnostic Module (SDM) is designed to perform the following functions in the air bag system:
D Energy Reserve
– The SDM maintains a reserve energy supply to provide deployment energy after ignition voltage is lost in
a frontal crash.
D Frontal Crash Detection
– The SDM monitors vehicle velocity changes to detect frontal crashes which are severe enough to warrant
deployment.
D Air Bag Deployment
– When a frontal crash of sufficient force is detected, the SDM will cause enough current to flow through the
air bag (inflator) modules to deploy the air bags.
D Seat Belt Pretensioner Activation (if equipped)
– When a frontal crash of sufficient force is detected, the SDM will cause enough current to flow through the
seat belt pretensioners to activate them.
D Malfunction Detection
– The SDM performs diagnostic monitoring of the air bag system electrical components and sets a DTC when
a malfunction is detected.
D Malfunction Diagnosis
– D The SDM provides air bag diagnostic trouble codes by flashing "AIR BAG" warning lamp when on-board
diagnosis function is used.
D The SDM displays air bag diagnostic trouble codes and system status information through the use of spe-
cial tool (SUZUKI scan tool).
D "AIR BAG" Warning Lamp Control
– The light is turned ON to warn the driver of occurrence of a trouble and made to turn ON to check the burned
bulb of "AIR BAG" warning lamp.
D Communication with SUZUKI scan tool
– D DTC display to DTC clear.
D In response to the output request from SUZUKI scan tool, DTC recorded in the memory, System ID, each
initiator circuit resistance and power source voltage as recognized by SDM at the time of the output re-
quest are provided.
COMPONENTS DESCRIPTION
SDM (SENSING AND DIAGNOSTIC MODULE)
WARNING:
D During service procedures, be very careful when han-
dling a Sensing and Diagnostic Module (SDM).
D Be sure to read "PRECAUTIONS" in this section be-
fore starting to work and observe every precaution
during work. Neglecting them may result in personal
injury or undeployment of the air bag when necessary.
CAUTION:
After detecting one time of such collision as to meet de-
ployment conditions, the SDM must not be used.
Refer to "DIAGNOSIS" when checking the SDM.
AIR BAG SYSTEM 9J-7