Mitsubishi Lancer Evolution IX. Manual — part 648
INDIVIDUAL COMPONENT SERVICE
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-105
INDIVIDUAL COMPONENT SERVICE
M1524002900431
WARNING
•
If heat damage may occur during paint work, remove the SRS-ECU, the driver’s and pas-
senger’s (front) air bag modules, the clock spring, front impact sensors and the seat belt
with pre-tensioner.
•
SRS-ECU, driver’s and passenger’s (front) air bag modules, clock spring and front
impact sensors: 93
°
C or more
•
Seat belt with pre-tensioner: 90
°
C or more
•
If the SRS components are removed for the purpose of check, sheet metal repair, painting,
etc., they should be stored in a clean, dry place until they are reinstalled.
If the SRS components are to be removed or replaced as a result of maintenance, troubleshooting etc., follow
the service procedures that follow. (Front impact sensor; refer to
, SRS-ECU; refer to
,
Driver’s and passenger’s (front) air bag modules and clock spring; refer to
, Seat belt with pre-ten-
sioner; refer to
).
WARNING/CAUTION LABELS
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-106
WARNING/CAUTION LABELS
M1524003000431
Caution labels on the SRS are attached in the vehicle as shown. Follow label instructions when servicing the
SRS. If the label(s) are dirty or damaged, replace with new one(s).
AC504533 AC
HOOD
Seat belt with pre-tensioner
(driver's and passenger's seat)
Clock spring
Passenger's (front)
air bag module
Instrument panel
Front impact sensor
Steering wheel
SRS-ECU
Sun visor
NOTE
: Indicates RHD vehicles. For LHD vehicles, the specified application position of label is reversed left to right.
FRONT IMPACT SENSORS
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-107
FRONT IMPACT SENSORS
REMOVAL AND INSTALLATION
M1524001500407
WARNING
•
Disconnect the negative battery terminal and wait for 60 seconds or more before starting
work. Furthermore, the disconnected battery terminal should be covered with tape to
insulate it.
•
Never attempt to disassemble or repair the front impact sensor. If faulty, replace it.
•
Do not drop or subject the front impact sensor to impact or vibration. If denting, cracking,
deformation, or rust are discovered in the front impact sensor, replace it with a new front
impact sensor. Discard the old one.
•
After deployment of an air bag, replace the front impact sensor with a new one.
NOTE: The figure on the left indicates the left front
impact sensor.
Pre-removal Operation
• Turn the ignition switch to the "LOCK" (OFF)
position.
• Disconnect the Negative Battery Terminal.
AC311090
1
Radiator
5.0 ± 1.0 N·m
AB
Removal step
1.
Front impact sensor
Installation steps
>>
A
<<
•
Pre-installation inspection
>>
B
<<
1.
Front impact sensor
•
Negative battery cable connection
>>
C
<<
•
Post-installation inspection
FRONT IMPACT SENSORS
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-108
INSTALLATION SERVICE POINTS
>>A<<PRE-INSTALLATION INSPECTION
When the new front impact sensor refer to the previ-
ous item "INSPECTION."
>>B<<FRONT IMPACT SENSOR
INSTALLATION
WARNING
The SRS may not activate properly if a front
impact sensor is not installed properly.
1. Securely connect the connector.
2. Position the front impact sensor facing toward the
front of the vehicle as shown by the arrow on the
label, and install it securely.
>>C<<POST-INSTALLATION INSPECTION
1. Connect the negative battery cable.
2. Turn the ignition switch to "ON" position.
3. Does the SRS warning lamp illuminate for about 7
seconds and then goes out?
4. If no, refer to troubleshooting (Refer to
INSPECTION
M1524001600374
WARNING
If a dent, crack, deformation or rust is
detected, replace with a new sensor.
1. Check the front impact sensor for dents, cracks,
deformation or rust.
WARNING
Always replace the sensor with a new one if
the resistance shows a short or open circuit.
2. Check short or open circuit between the terminals
of the front impact sensor.
Short circuit: 2
Ω or less
Open circuit: 2 M
Ω or more
3. Check the continuity between the terminal and
bracket. If there is a continuity, the insulation is
malfunctioned, and replace the sensor with a new
one.
4. Check the head lamp support pane for
deformation and rust.
AC311044
SRS warning lamp
AB
ACX00597AC
ACX00598 AC
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