Lexus SC300 / Lexus SC400. Manual — part 787
1.
DISCONNECT NEGATIVE (–) TERMINAL CABLE FROM
BATTERY
CAUTION: Work must be started after 90 seconds from
the time the ignition switch is turned to the “LOCK” posi-
tion and the negative (–) terminal cable is disconnected
from the battery.
(See page
2.
REMOVE ENGINE UNDER COVER
(See page
)
3.
REMOVE FRONT AIRBAG SENSOR
(a) Disconnect the connector.
(b) Remove the bolt, the nut and the sensor.
4.
INSTALL FRONT AIRBAG SENSOR
(a) Install the sensor with the arrow on the sensor facing toward
the front of the vehicle.
Torque: 25 N
⋅
m (260 kgf
⋅
cm, 19 ft
⋅
lbf)
NOTICE:
•
Make sure the sensor is installed to the specified torque.
•
If the sensor has been dropped, or there are cracks, dents
or other defects in the case, brackets or connector,
replace the sensor is removed, always replace the set bolt
and the nut with new one.
•
The sensor set bolt and the nut have been anti–rust
treated. When the sensor is removed, always replace the
set bolt and the nut with new ones.
•
After installation, shake the sensor to check that there is
no looseness.
•
The front sensor is equipped with an electrical
connection check mechanism. Be sure to lock this
mechanism securely when connecting the connector. If
the connector is not securely locked, a malfunction code
will be detected by the diagnosis system.
•
Check that the dimensions of the body where the front
airbag sensor is installed match those in the body
dimension drawings in the BODY section.
(The SRS may malfunction, or may not work, if the
dimensions of the sensor mount is not correct.)
5.
INSTALL ENGINE UNDER COVER
6. CONNECT NEGATIVE (–) TERMINAL CABLE TO
BATTERY
–
SUPPLEMENTAL RESTRAINT SYSTEM
FRONT AIRBAG SENSOR
RS–43
CENTER AIRBAG SENSOR
ASSEMBLY
INSPECTION ITEMS
RS047–01
1.
VEHICLES NOT INVOLVED IN A COLLISION
Perform a diagnostic system check.
(See page
2.
VEHICLES INVOLVED IN A COLLISION
IF THE SRS IS NOT DEPLOYED
Perform a diagnostic system check.
(See page
IF THE SRS IS DEPLOYED
Replace the center airbag sensor assembly.
REPLACEMENT REQUIREMENTS
RS019–06
In the following cases, replace the center airbag sensor as-
sembly.
NOTICE: For replacement of the center airbag sensor as-
sembly, see page
ASSEMBLY REMOVAL AND INSTALLATION” and be sure
to follow the correct procedure.
•
If the SRS has been deployed in a collision.
•
If the center airbag sensor assembly has been found to
be faulty in troubleshooting.
•
If the center airbag sensor assembly has been dropped.
RS–44
–
SUPPLEMENTAL RESTRAINT SYSTEM
CENTER AIRBAG SENSOR ASSEMBLY
COMPONENTS
RS048–01
–
SUPPLEMENTAL RESTRAINT SYSTEM
CENTER AIRBAG SENSOR ASSEMBLY
RS–45
CENTER AIRBAG SENSOR ASSEMBLY
REMOVAL AND INSTALLATION
RS049–01
NOTICE:
•
Do not open the cover or the case of the ECU and various
computers unless absolutely necessary. (If the IC
terminals are touched, the IC may be destroyed by static
electricity.)
•
Never use SRS parts from another vehicle. When
replacing parts, replace with new parts.
•
Never reuse the center airbag sensor assembly involved
in a collision when the airbag has deployed.
•
Never repair a sensor in order to reuse it.
1.
DISCONNECT NEGATIVE (–) TERMINAL CABLE FROM
BATTERY
CAUTION: Work must be started after 90 seconds from
the time the ignition switch is turned to the LOCK posi-
tion and the negative (–) terminal cable is disconnected
from the battery (See page
2.
REMOVE AND INSTALL CENTER AIRBAG SENSOR
ASSEMBLY
(a) Using a torx wrench, loosen and tighten the 3 screws.
Torx wrench: T40 (Part No. 09042–00020 or locally manufac-
tured tool)
(b) Disconnect and connect the connector.
NOTICE: Removal and installation of the connector is
done with the sensor assembly installed.
(c) Using a torx wrench, tighten the 3 screws.
Torx wrench: T40 (Part No. 09042–00020 or locally manufac-
tured tool)
Torque: 15 N
⋅
m (150 kgf
⋅
cm, 11 ft
⋅
lbf)
NOTICE:
•
Make sure the sensor assembly is installed to the
specified torque.
•
If the sensor assembly has been dropped, or there are
cracks, dents or other defects in the case, bracket or
connector, replace the sensor assembly with a new one.
•
When installing the sensor assembly, take care that the
airbag wiring does not interfere with other parts and is
not pinched between other parts.
•
After installation, shake the sensor assembly to check
that there is no looseness.
RS–46
–
SUPPLEMENTAL RESTRAINT SYSTEM
CENTER AIRBAG SENSOR ASSEMBLY
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