SAS CONTROL MODULE [TWO-STEP DEPLOYMENT CONTROL SYSTEM]

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Purpose

• The SAS control module controls the air bag system.

• The SAS control module controls the active bonnet.

Function

Air bag system initialization diagnostics function

• 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.

Active bonnet initialization diagnostics function

• When the ignition is switched ON, the SAS control module turns on the active bonnet warning light in the instrument cluster for approx. 6 s to indicate that the active bonnet is performing initialization diagnostics.

• If there is no malfunction with the active bonnet, the active bonnet 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 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

Sensor	Signal
Low-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

•  DSC HU/CM

•  Front body control module (FBCM)

•  Rear body control module (RBCM)

•  Mazda ERA-GLONASS control module

Secondary collision reduction signal

(See SECONDARY COLLISION REDUCTION.)

(See POWER DOOR LOCK SYSTEM.)

(See MAZDA ERA-GLONASS.)

•  PCM

•  Instrument cluster

•  Center display

Fuel-cut request signal

(See FUEL INJECTION CONTROL SYSTEM [SKYACTIV-G 2.5 (WITH CYLINDER DEACTIVATION)].)

(See FUEL INJECTION CONTROL SYSTEM [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT CYLINDER DEACTIVATION)].)

(See FUEL INJECTION CONTROL SYSTEM [SKYACTIV-G 2.5T].)

(See FUEL INJECTION AMOUNT CONTROL [SKYACTIV-D 2.2].)

(See ENTERTAINMENT SYSTEM [WITH CENTER DISPLAY].)

Related unit	Signal	Reference
• DSC HU/CM • Front body control module (FBCM) • Rear body control module (RBCM) • Mazda ERA-GLONASS control module	Secondary collision reduction signal	(See SECONDARY COLLISION REDUCTION.) (See POWER DOOR LOCK SYSTEM.) (See MAZDA ERA-GLONASS.)
• PCM • Instrument cluster • Center display	Fuel-cut request signal	(See FUEL INJECTION CONTROL SYSTEM [SKYACTIV-G 2.5 (WITH CYLINDER DEACTIVATION)].) (See FUEL INJECTION CONTROL SYSTEM [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT CYLINDER DEACTIVATION)].) (See FUEL INJECTION CONTROL SYSTEM [SKYACTIV-G 2.5T].) (See FUEL INJECTION AMOUNT CONTROL [SKYACTIV-D 2.2].) (See ENTERTAINMENT SYSTEM [WITH CENTER DISPLAY].)

Driver's seat position detection function

• The SAS control module detects the slide position (foremost position or position other than foremost 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].)

Structure/Construction

• The SAS control module is located underneath the rear console.

• The following sensors are integrated with the SAS control module.

― Determination and safing circuit

― Output control circuit

• The following sensors are integrated with SAS control module.

― Crash sensor

― Yaw rate sensor

― Low-G sensor

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Operation

• For the SAS control module operation, refer to the [AIR BAG SYSTEM [TWO-STEP DEPLOYMENT CONTROL SYSTEM]]. (See AIR BAG SYSTEM [TWO-STEP DEPLOYMENT CONTROL SYSTEM].)

• For the SAS control module operation, refer to the [ACTIVE BONNET]. (See ACTIVE BONNET.)

Fail-safe

• If a malfunction occurs in the air bag system and DTCs are detected, the SAS control module inhibits control of the air bag system so that they do not operate (deploy) accidentally, and it flashes the air bag/seat belt pre-tensioner system warning light.

• If a malfunction occurs in the active bonnet and DTCs are detected, the SAS control module inhibits control of the active bonnet so that they do not operate accidentally, and it flashes the active bonnet warning light.

• If a malfunction occurs in the seat track position sensor and DTCs are detected, the SAS control module controls the forward/back slide position of the driver's seat as the maximum forward position.

• If the SAS control module receives malfunction information from the occupant classification sensor, it controls to prevent the passenger’s side air bags from operating (deploying).