The SRS-ECU adopts the rollover specification
that the curtain airbag and seat belt pre-tensioner
operate at the occurrence of rollover. Therefore,
do not tilt the vehicle to the right and left with the
IG ON or tilt the SRS-ECU to the right and left with
the IG ON and the harness installed.

Improper service could result in serious injury of
the service personnel or the passenger.

The SRS is designed to supplement the front seat
belts. It reduces injury to the driver(s) and the front
passenger(s) by deploying air bag(s) in case of a
frontal collision.

The SRS front air bags from an advanced air bag
system together with sensors at the vehicle and
sensors attached to front seats.

Side-airbag systems in the front seats are activated
when side impacts exceed a criteria to protect the
occupants’ upper bodies.

The curtain airbag system operates together with the
side-airbag to protect the heads of passengers in the
front and second seats.

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-5

FASTENER TIGHTENING SPECIFICATIONS

The seat belts with pre-tensioner work simultaneously
with  the  SRS.  The  seat  belt  incorporating  the  pre-
tensioner automatically winds the seat belt upon front
impact to reduce forward shifting of the driver’s and
passenger’s.  The  seat  belt  use  status  is  used  to
control  the  activation  and  deactivation  of  the  pre-
tensioner.

The SRS consists of six air bag modules, SRS air bag
control unit (SRS-ECU), two front impact sensors, four
side impact sensors, SRS warning light, passenger’s
air  bag  OFF  indicator  light,  passenger’s  seat  belt
warning  light,  clock  spring,  seat  belt  pre-tensioner,
seat belt switch, seat slide sensor, weight sensor and
occupant  classification-ECU.  Air  bag  modules  are
located in the center of the steering wheel and above
the  glove  box.  Side-airbags  are  located  inside  the
front seatback assemblies. The curtain air bag module
consists of an air bag, an inflator, and the fixing gear
relating to those parts, and is installed in the roof side
sections (from the driver's and the passenger's front
pillars to the rear pillars). Each air bag consists of a
folded  air  bag  and  an  inflator  unit.  The  SRS-ECU
placed  on  the  forefront  of  the  floor  monitors  the
system and has a front air bag safing G-sensor, front
air bag analog G-sensor and a side-airbag safing G-

sensor. The front impact sensor is assembled in the
front end upper bar to monitor impact in case of front
impact.  The  side  impact  sensors  inside  the  center
pillars and the rear quarter panel monitor the shock
incurred by the sides of the vehicle. The SRS warning
light  on  the  combination  meter  indicates  the
operational  status  of  the  SRS.  The  clock  spring  is
installed  in  the  steering  column.  The  seat  belt  pre-
tensioner is built into the driver's and passenger's front
seat belt retractor. The seat slide sensor is installed
at the seat adjuster section of the driver seat in order
to  detect  the  driver  seat  slide  position.  The  weight
sensor is installed underneath a rail of the passenger
seat to detect the load on the seat. The passenger’s
air bag OFF indicator light is installed to the lower left
of  the  center  panel,  and  illuminates  when  the
passenger  seat  airbag  is  inactive.  The  passenger’s
seat belt warning light is installed to the lower right of
the center panel, and illuminates when the passenger
is  not  wearing  the  seat  belt.  The  seat  belt  switch
detects whether the seat belt is used.
Only authorized service personnel should do work on
or  around  the  SRS  components.  Those  service
personnel  should  read  this  manual  carefully  before
starting any such work.

ON-BOARD DIAGNOSTIC/SRS WARNING LIGHT
FUNCTION

ZC601295

SRS Warning light

0000

The diagnosis unit monitors the SRS system and stores data
concerning any detected faults in the system. When the ignition
switch is in "ON" or "START" position, the SRS warning light
should illuminate for about seven seconds and then turn "OFF."
That indicates that the SRS system is in operational order. If the
SRS warning light does any of the following, immediate
inspection by an authorized dealer is needed:

The SRS warning light does not illuminate as described
above.

The SRS warning light stays on for more than seven seconds.

The SRS warning light illuminates while driving.

If a vehicle's SRS warning light is in any of these three
conditions, the SRS system must be inspected, diagnosed and
serviced in accordance with this manual.

52B-6

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

GENERAL INFORMATION

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