SAS CONTROL MODULE [TWO-STEP DEPLOYMENT CONTROL SYSTEM – US/CANADA SPEC.]
SAS CONTROL MODULE [TWO-STEP DEPLOYMENT CONTROL SYSTEM – US/CANADA SPEC.]
SM2334170
id0810b4500200
Purpose
Function
Air bag system initialization diagnostics function
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• When the ignition is switched ON, the SAS control module turns on the air bag/seat belt pre-tensioner system warning light in the instrument cluster for approx. 6 s to indicate that the air bag system is performing initialization diagnostics.• If there is no malfunction with the air bag system, the air bag/seat belt pre-tensioner system warning light turns off.
Backup power supply function
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• The condenser in the SAS control module discharges even if the power supply to the SAS control module has been cut off due to a collision, and the backup power supply function operates the air bag system for a specified period of time.
Vehicle travel conditions detection function
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• The SAS control module detects the signals from the following integrated sensors.• The SAS control module outputs the detection signals from the following sensors and outputs them to the DSC HU/CM via a CAN signal.
Sensor |
Signal |
---|---|
Low-G sensor
|
• Vehicle longitudinal acceleration speed signal
• Vehicle lateral acceleration speed signal
|
Yaw rate sensor
|
• Vehicle steering angle speed signal
|
Roll rate sensor
|
• Vehicle roll angle speed signal
|
Collision detection signal output function
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• The SAS control module sends the following signal to the following units when it determines that it is necessary for the air bag system to operate (deploy).• When the signal is received, the each unit performs controls to mediate secondary injuries caused by the vehicle collision.
Related unit |
Signal |
Reference |
---|---|---|
• DSC HU/CM
• Body control module (BCM)
• Telematics communication unit
|
Secondary collision reduction signal
|
|
• PCM
• Instrument cluster
• Center display
|
Fuel-cut request signal
|
Driver’s seat position detection function
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• The SAS control module detects the slide position (most forward position or position other than most forward position) of the driver’s seat based on the signal from the seat position sensor. For details on the driver’s seat position detection function, refer to the [SEAT TRACK POSITION SENSOR]. (See SEAT TRACK POSITION SENSOR [TWO-STEP DEPLOYMENT CONTROL SYSTEM – US/CANADA SPEC.].)
Structure/Construction
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― Determination and safing circuit― Output control circuit
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― Crash sensor― Yaw rate sensor― Low-G sensor― Roll rate sensor
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Operation