Page 962 of 1111
AB0089
Secondary Lock
Primary LockLockLock
Primary Lock Incomplete
(Secondary Lock Prevented)Primary Lock Complete
(Secondary Lock Permitted)Twin±Lock Completed
Z14034
Fig.1
Fig.2Power Source
Safing
Sensor
Squibs
Airbag Sensor
± SUPPLEMENTAL RESTRAINT SYSTEMSRS AIRBAG
RS±7
2238 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(4) Connector Twin±Lock Mechanism
With this mechanism connectors (male and female
connectors) are locked by 2 locking devices to in-
crease the connection reliability. If the primary lock
is incomplete, ribs interfere and prevent the sec-
ondary lock.
(b) When the vehicle is involved in a frontal collision in the
hatched area (Fig. 1) and the shock is larger than the pre-
determined level, the SRS is activated automatically. A
safing sensor is designed to go on at a smaller decelera-
tion rate than the airbag sensor. As illustrated in Fig. 2,
ignition is caused when current flows to the squib, which
happens when a safing sensor and the airbag sensor go
on simultaneously. When a deceleration force acts on the
sensors, 2 squibs in the driver airbag and front passenger
airbag ignite and generate gas. The gas discharging into
the driver airbag and front passenger airbag rapidly in-
creases the pressure inside the bags, breaking open the
steering wheel pad and instrument panel door.
Bag inflation then ends, and the bags deflate as the gas
is discharged through discharge holes at the bag's rear or
side.
Page 971 of 1111
RS07E±01
H02589
H02590
H02591
RS±28
± SUPPLEMENTAL RESTRAINT SYSTEMFRONT PASSENGER AIRBAG ASSEMBLY
2259 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REMOVAL
NOTICE:
If the wiring connector of the SRS is disconnected
and the ignition switch is in ON or ACC position, DTCs
will be recorded.
Never use airbag parts from another vehicle. When
replacing parts, replace with new parts.
1. DISCONNECT AIRBAG CONNECTOR
(a) Using a screwdriver, remove the glove compartment door
finish plate.
HINT:
Tape the screwdriver tip before use.
(b) Remove the airbag connector from the plate.
(c) Disconnect the airbag connector.
2. REMOVE INSTRUMENT PANEL
(See page BO±91)
3. REMOVE FRONT PASSENGER AIRBAG ASSEMBLY
(a) Remove the 2 bolts and 2 straps.
(b) Remove the 2 nuts and front passenger airbag assembly.
CAUTION:
Do not store the front passenger airbag assembly
with the airbag deployment side facing down.
Never disassemble the front passenger airbag as-
sembly.
Page 983 of 1111
RS0JC±01
N20339
H03709
RS±40
± SUPPLEMENTAL RESTRAINT SYSTEMSIDE AIRBAG ASSEMBLY
2271 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REMOVAL
NOTICE:
If the wiring connector of the SRS is disconnected
and the ignition switch is in ON or ACC position, DTCs
will be recorded.
Never use the airbag parts from another vehicle.
When replacing parts, replace them with new parts.
1. REMOVE FRONT SEAT OUTER BELT FLOOR AN-
CHOR
(a) Using a screwdriver, remove the seat belt anchor cover
cap.
HINT:
Tape the screwdriver tip before use.
(b) Remove the front seat outer belt floor anchor.
2. REMOVE FRONT SEAT
(a) Using a screwdriver, remove the 4 seat track covers.
HINT:
Tape the screwdriver tip before use.
(b) Remove the 4 bolts, then disconnect the airbag connec-
tor.
NOTICE:
When handling the airbag connector, take care not to dam-
age the airbag wire harness.
(c) Remove the front seat.
3. REMOVE HEADREST
4. REMOVE POWER SEAT SWITCH KNOBS
5. REMOVE FRONT SEAT CUSHION SHIELD
6. REMOVE FRONT SEAT INNER CUSHION COVER
7. REMOVE SIDE AIRBAG ASSEMBLY WIRE HARNESS
(a) Remove the connector from the bracket.
(b) Remove the 5 clamps and wire harness from the seat
cushion frame
8. REMOVE SEAT CUSHION ASSEMBLY
(a) Remove the wire harness from the seat cushion asseml-
by.
(b) Remove the 4 bolts and seat cushion assemlby from the
seat adjuster.
Page 1001 of 1111
RS07V±01
H02694
H02695
H02696
RS±58
± SUPPLEMENTAL RESTRAINT SYSTEMFRONT AIRBAG SENSOR
2289 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REMOVAL
NOTICE:
If the wiring connector of the SRS is disconnected
with the ignition switch in ON or ACC position, DTCs
will be recorded.
Never use SRS parts from another vehicle. When re-
placing parts, replace them with new parts.
Never reuse the sensor involved in a collision when
the SRS has deployed.
Never repair a sensor in order to reuse it.
1. REMOVE LH FRONT AIRBAG SENSOR
(a) Remove the 2 bolts and J/B cover.
(b) Remove the bolt and 2 nuts.
(c) Disconnect the connectors and hose, then remove the
J/B box.
(d) Disconnect the connector, then remove the bolt, nut and
sensor.
