Mitsubishi LANCER EVOLUTION 2003 Technical Information Manual page 156

CONSTRUCTION DIAGRAM
VEHICLES
IDENTIFICATION
CODE CHART
PLATE
DRIVER'S AIR
BAG MODULE
CLOCK SPRING
DATA LINK
CONNECTOR
(FOR SCAN
TOOL)
The SRS and seat belt tightening systems consist of
driver's/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.
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
GENERAL DESCRIPTION
PASSENGER'S (FRONT)
AIR BAG MODULE
SRS-ECU
SRS WARNING LIGHT
RADIATOR
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.
52B-3
FRONT IMPACT SENSOR
SEAT BELT WITH
PRE-TENSIONER
AC211592 AB