Mitsubishi MOTORS Lancer Evolution VIII 2003, Technical Information Manual, Page: 4 / 368

GENERAL DESCRIPTION
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-3
CONSTRUCTION DIAGRAM
The SRS and seat belt tightening systems consist of
driverís/passenger air bag modules, SRS-ECU, two
front impact sensors, SRS warning light, clock
spring, and seat belt pre-tensioner. Air bags are
located in the center of the steering wheel and above
the glove box. Each air bag has a safing folded air
bag and an inflators the system and has a safing G
sensor and an analogue G sensor. On all air bag
modules, the inflator does not contain sodium azide.
The front impact sensor is assembled on the head-
light support panel to monitor collision upon frontal
impact. The warning light on the instrument panel
indicates the operational status of the SRS. A clock
spring is installed in the steering column. The SRS-ECU detects the impact produced at the
time of a collision from the safing and analog G sen-
sors and supplies squib ignition current to the air bag
modules.
The SRS-ECU has the following functions:
This triggers the air bag modules.
•
Power supply backup function (backup con-
denser) that deploys or operates the air bag mod-
ule and seat belt pretensioner within specific
period, in case of power failure upon impact.
•
Voltage raising function (DC-DC converter cir-
cuit).
•
Diagnostic test mode to improve safety and reli-
ability.
AC211592
VEHICLES
IDENTIFICATION
CODE CHART
PLATE
SRS WARNING LIGHT
DRIVER'S AIR
BAG MODULE
CLOCK SPRING
DATA LINK
CONNECTOR
(FOR SCAN
TOOL)
SRS-ECU
PASSENGER'S (FRONT)
AIR BAG MODULE
AB
SEAT BELT WITH
PRE-TENSIONER
RADIATOR
FRONT IMPACT SENSOR