Mitsubishi LANCER EVOLUTION 2003 User Manual

SRS-ECU
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-10
CAUTION
When the connector is disconnected, there will
be short circuit between the terminals. This is not
a fault.
The switch is a mechanism that shorts the power
supply terminal to the ground terminal automatically
in the air bag squib circuit when the connector is dis-
connected. A "short" spring is integrated inside the
connector. This spring prevents static electricity from
flowing to the squib by shorting the power supply ter-
minal to the ground terminal (i.e. there is no potential
difference between the two terminals).
WARNING LIGHT CIRCUIT CONNECTOR LOCK
SWITCH
The switch is a mechanism that shorts the power supply termi-
nal to the ground terminal automatically in the warning light cir-
cuit, when the connector is disconnected. Its structure is similar
to the squib circuit connector shorting mechanism.
SRS-ECU
M2521007000095
CAUTION
Never disassemble the SRS-ECU.
The SRS-ECU incorporates an analog G-sensor and
safing G-sensor for frontal collisions and a safing G-
sensor for side collisions. In frontal collisions, the
driver’s and passenger’s (front) air bags deploy and
the seat belt pre-tensioners are activated only when
both the analog and safing G-sensors detect simulta-
neously a collision-induced G of a level exceeding
the threshold as in the case with the conventional
system. In the case of side collisions, the side-airbag
on the side subjected to an impact deploys if the side
impact sensor and the SRS-ECU’s safing G-sensor
detect simultaneously a lateral G of forces above the
predetermined level.
The SRS-ECU is provided with the following capabil-
ities:
• Backup power supply in case of power failure in
collisions
• Boosting function in case of battery voltage drop
• Self-diagnosis function to avoid system’s opera-
tion errors and improve its reliability
DIAGNOSTIC FUNCTION
The SRS-ECU has the following functions to make
system checking using the scan tool easy.
• Diagnostic trouble code output
• Service data output
AC006203
IGNITION
SWITCH (IG1)
SRS WARNING
LIGHT
SHORT
SPRING
AB
SRS-ECU HARNESS-SIDE
CONNECTOR
OFF
ON
NOTE
*: CONNECTOR LOCKED: ON
CONNECTOR UNLOCKED: OFF
CONNECTOR
LOCK SWITCH*
OFF
ON

Mitsubishi LANCER EVOLUTION 2003 Specifications

General

Brand	Mitsubishi
Model	LANCER EVOLUTION 2003
Category	Automobile
Language	English