SAS CONTROL MODULE [TWO-STEP DEPLOYMENT CONTROL SYSTEM - US/CANADA SPEC.]

id0810b4700100

Purpose

Function

Air bag system initialization diagnostics function

•  When the main power is switched ON (READY off or 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

•  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

•  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 electronically controlled brake unit via a CAN signal.

Sensor	Signal
G sensor	•  Vehicle longitudinal acceleration speed signal •  Vehicle lateral acceleration speed signal
Yaw rate sensor	•  Vehicle steering angle speed signal

Collision detection signal output function

•  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
•  Electronically controlled brake unit •  Body control module (BCM) •  Door-electrical supply unit •  Telematics communication unit	•  Crash signal •  Door unlock signal •  Emergency call signal	(See SECONDARY COLLISION REDUCTION.)

Driver's seat position detection function

•  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

―  Determination and safing circuit

―  Output control circuit

―  Crash sensor

―  Yaw rate sensor

―  Low-G sensor

―  Roll rate sensor

a30zzn00000251

Operation