Mazda RX-8. Manual — part 23

AIR BAG SYSTEM

08–10–3

08–10

PASSENGER SENSING SYSTEM CONSTRUCTION

EHU081057031102

•

Consists of the seat weight sensors installed on the underside of the front passenger slide adjuster, the seat
weight sensor control module installed to the underside of the seat weight sensor on the right, the PAD
indicator, and the SAS control module installed on the console.

End Of Sie

PASSENGER SENSING SYSTEM OPERATION

EHU081057031103

1. The load on the passenger-side seat is converted into an electric signal by the strain gauge built into the seat

weight sensor, and this signal is sent to the seat weight sensor control module.

2. The electronic signals from the two seat weight sensor are used for calculation by the seat weight sensor

control module, which divides the result and then determines whether there is an adult or child (including a
child-restraint seat) in the passenger-side seat, or that it is empty. The determined result is sent to the SAS
control module.

3. The SAS control module performs control based on this determined result as shown in the following table when

the module detects a level of impact requiring operation (deployment).

×

: Possible

-: Not possible

Note

•

The passenger-side air bag module, the passenger-side side air bag module and the passenger-side pre-
tensioner seat belt system will be turned off as the total seated weight drops toward 30kg {66 lb} and they
will be turned on again before the weight exceeds 42kg {93 lb}.

PAD
INDICATOR

SEAT WEIGHT SENSOR
CONTROL MODULE

SEAT WEIGHT
SENSOR (RH)

SEAT WEIGHT
SENSOR (LH)

SAS CONTROL
MODULE

EHU810ZS8002

Determined result

Determined weight

Passenger-side

air bag module

operation

(deployment)

Passenger-side

side air bag

module operation

(deployment)

Passenger-side

pre-tensioner seat

belt operation

(deployment)

PAD

indicator

Adult

Approx. 42 kg {93 lb} or
more

×

×

×

Not

illuminated

Child (including
child-restraint seat)

Approx. 30 kg {66 lb} or
less

-

-

-

Illuminated

Empty

Approx. 0 kg {0 lb}

-

-

-

Not

illuminated

AIR BAG SYSTEM

08–10–4

Caution

•

If any of the following work is performed, perform the seat weight sensor calibration using the
WDS or equivalent.

—

Replacement with a new seat weight sensor

—

Replacement with a new seat weight sensor control module

—

Replacement with new passenger-side seat parts

—

Disassembly of the passenger-side seat

•

If any of the following work is performed, perform the seat weight sensor inspection using the
WDS or equivalent.

—

Removal of the passenger-side seat

—

Loosening and retightening of passenger’s seat fixing bolts

—

Or, the vehicle is involved in a collision

End Of Sie

IG1

IG1

IG1

IG1

PAD
INDICATOR

PAD
INDICATOR

PAD
INDICATOR

SAS
CONTROL
MODULE

SAS
CONTROL
MODULE

SAS
CONTROL
MODULE

SEAT
WEIGHT
SENSOR
(RH)

SEAT
WEIGHT
SENSOR
CONTROL
MODULE

ADULT
DETERMINED

EMPTY SEAT
DETERMINED

SEAT
WEIGHT
SENSOR
CONTROL
MODULE

SEAT
WEIGHT
SENSOR
(LH)

SEAT
WEIGHT
SENSOR
CONTROL
MODULE

SEAT
WEIGHT
SENSOR
(RH)

SEAT
WEIGHT
SENSOR
(RH)

SEAT
WEIGHT
SENSOR
(LH)

SEAT
WEIGHT
SENSOR
(LH)

TWISTED
PAIR

TWISTED
PAIR

TWISTED
PAIR

ELECTRIC SIGNAL

ELECTRIC SIGNAL

ELECTRIC SIGNAL

CHILD (INCLUDING A
CHILD-RESTRAINT SEAT)
DETERMINED

PASSENGER-SIDE
AIR BAG MODULE

PASSENGER-SIDE
AIR BAG MODULE

PASSENGER-SIDE SIDE
AIR BAG MODULE

PASSENGER-SIDE SIDE
AIR BAG MODULE

PASSENGER-SIDE
AIR BAG MODULE

PASSENGER-SIDE SIDE
AIR BAG MODULE

IG1

IG1

PASSENGER-SIDE
PRE-TENSIONER
SEAT BELT

PASSENGER-SIDE
PRE-TENSIONER
SEAT BELT

PASSENGER-SIDE
PRE-TENSIONER
SEAT BELT

EHU810ZS8003

09–00–1

09

BODY & ACCESSORIES

SECTION

09–00

Toc of SCT

OUTLINE . . . . . . . . . . . . . . . . . . 09-00
SECURITY AND LOCKS

[ADVANCED
KEYLESS SYSTEM]. . . . . . . . 09-14A

SECURITY AND LOCKS

[KEYLESS ENTRY
SYSTEM] . . . . . . . . . . . . . . . . 09-14B

ENTERTAINMENT . . . . . . . . . . 09-20
INSTRUMENTATION/DRIVER

INFO. . . . . . . . . . . . . . . . . . . . 09-22

Toc of SCT

09–00

OUTLINE

BODY AND ACCESSORIES

ABBREVIATIONS. . . . . . . . . . . . . . . . . . 09–00–1

BODY AND ACCESSORIES NEW

FEATURES . . . . . . . . . . . . . . . . . . . . . . 09–00–1

End of Toc

BODY AND ACCESSORIES ABBREVIATIONS

EHU090000000101

End Of Sie

BODY AND ACCESSORIES NEW FEATURES

EHU090000000102

End Of Sie

A/C

Air Conditioner

ACC

Accessories

AT

Automatic Transmission

CAN

Controller Area Network

CM

Control Module

CPU

Central Processing Unit

CTR

Center

DLC

Data Link Connector

DTC

Diagnostic Trouble Code

GND

Ground

HI

High

IG

Ignition

LCD

Liquid Crystal Display

LED

Light Emitting Diode

LH

Left Hand

LO

Low

M

Motor

MT

Manual Transmission

OFF

Switch Off

ON

Switch On

PCM

Powertrain Control Module

PID

Parameter Identification

P/W CM

Power Window Control Module

RH

Right Hand

SW

Switch

TNS

Tail Number Side Lights

WDS

Worldwide Diagnostic System

Improved marketability

•

Advanced keyless entry and start system adopted

•

Car-navigation unit modified