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
driverís and passengerís (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-ECUís 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 systemís 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
Summary of Contents for Lancer Evolution VIII 2003
Page 14: ...36 1 GROUP 36 PARKING BRAKE CONTENTS GENERAL INFORMATION 36 2 ...
Page 27: ...NOTES ...
Page 34: ...34 1 GROUP 34 REAR SUSPENSION CONTENTS GENERAL DESCRIPTION 34 2 ...
Page 37: ...NOTES ...
Page 43: ...NOTES ...
Page 57: ...NOTES ...
Page 58: ...31 1 GROUP 31 WHEEL AND TIRE CONTENTS GENERAL INFORMATION 31 2 ...
Page 60: ...21 1 GROUP 21 CLUTCH CONTENTS GENERAL DESCRIPTION 21 2 ...
Page 70: ...27 1 GROUP 27 REAR AXLE CONTENTS REAR AXLE 27 2 DIFFERENTIAL 27 3 ...
Page 75: ...NOTES ...
Page 85: ...NOTES ...
Page 94: ...26 1 GROUP 26 FRONT AXLE CONTENTS GENERAL DESCRIPTION 26 2 ...
Page 114: ...11A 1 GROUP 11A ENGINE CONTENTS GENERAL SPECIFICATIONS 11A 2 BASE ENGINE 11A 3 ...
Page 119: ...NOTES ...
Page 126: ...13B 1 GROUP 13B FUEL SUPPLY CONTENTS GENERAL DESCRIPTION 13B 2 FUEL TANK 13B 3 ...
Page 129: ...NOTES ...
Page 130: ...25 1 GROUP 25 PROPELLER SHAFT CONTENTS GENERAL DESCRIPTION 25 2 ...
Page 132: ...16 1 GROUP 16 ENGINE ELECTRICAL CONTENTS CAMSHAFT POSITION SENSOR 16 2 ...
Page 134: ...12 1 GROUP 12 ENGINE LUBRICATION CONTENTS GENERAL DESCRIPTION 12 2 ...
Page 142: ...32 1 GROUP 32 POWER PLANT MOUNT CONTENTS GENERAL DESCRIPTION 32 2 ...
Page 144: ...14 1 GROUP 14 ENGINE COOLING CONTENTS GENERAL DESCRIPTION 14 2 ...
Page 147: ...NOTES ...
Page 161: ...NOTES ...
Page 162: ...13 1 GROUP 13 FUEL CONTENTS MULTIPORT FUEL SYSTEM MFI 13A FUEL SUPPLY 13B ...
Page 163: ...NOTES ...
Page 177: ...NOTES ...
Page 183: ...NOTES ...
Page 203: ...7 1 GROUP 7 WIRING AND PIPING DIAGRAM CONTENTS PIPING DIAGRAM 7 2 ...
Page 246: ...NOTES ...
Page 260: ...NOTES ...
Page 264: ...NOTES ...
Page 265: ...5 1 GROUP 5 SYNTHETIC RESIN PARTS CONTENTS LOCATION OF SYNTHETIC RESIN PARTS 5 2 ...
Page 268: ...NOTES ...
Page 276: ...NOTES ...
Page 283: ...FENDER SHIELD WELDED PANEL REPLACEMENT 3 7 NOTES ...
Page 368: ...NOTES ...