Lexus RX300 (MCU15). Manual — part 283
H10600
H01018
H01073
AB0119
H12026
→ ←
Airbag
Sensor
Assembly
Squib (LH)
DTC B0115/47
DLC3
Tc
CG
ON
DI–364
–
DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
LEXUS RX300 (RM785E)
4
Check side squib (LH).
PREPARATION:
(a)
Turn the ignition switch to LOCK.
(b)
Disconnect negative (–) terminal cable from the battery,
and wait at least for 90 seconds.
(c)
Connect the front side airbag assembly (LH) connector.
(d)
Connect negative (–) terminal cable to the battery, and
wait at least for 2 seconds.
CHECK:
(a)
Turn the ignition switch to LOOK, and wait at least for 20
second.
(b)
Turn the ignition switch to ON, and wait at least for 20 se-
conds.
(c)
Clear the DTC stored in memory (See page DI–305).
(d)
Turn the ignition switch to LOCK, and wait at least for 20
seconds.
(e)
Turn the ignition switch to ON, and wait at least for 20 se-
conds.
(f)
Check the DTC (See page DI–305).
OK:
DTC B0115/47 is not output.
HINT:
Codes other than code B0115/47 may be output at this time, but
they are not relevant to this check.
NG
Replace side airbag assembly (LH).
OK
From the results of the above inspection, the malfunctioning part can now be considered normal.
To make sure of this, use the simulation method to check.
H01019
H16275
H16623
Squib (LH)
Airbag
Sensor
Assembly
(–)
(+)
SFL–
SFL+
–
DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
DI–365
LEXUS RX300 (RM785E)
DTC
B0116/48
Open in Side Squib (LH) Circuit
CIRCUIT DESCRIPTION
The side squib (LH) circuit consists of the airbag sensor assembly and side airbag assembly (LH).
It causes the SRS to deploy when the SRS deployment conditions are satisfied.
For details of the function of each component, see OPERATION on page RS–2.
DTC B0116/48 is recorded when an open is detected in the side squib (LH) circuit.
DTC No.
DTC Detecting Condition
Trouble Area
B0116/48
S Open circuit in SFL+ wire harness or SFL– wire harness
of squib
S Side squib (LH) malfunction
S Airbag sensor assembly malfunction
S Side airbag assembly (LH)
S Airbag sensor assembly
S Wire harness
WIRING DIAGRAM
See page DI–361.
INSPECTION PROCEDURE
1
Prepare for inspection (See step 1 on page DI–431).
2
Check side squib (LH) circuit.
CHECK:
For the connector (on the front side airbag assembly side) be-
tween the front side airbag assembly (LH) and the airbag sen-
sor assembly, measure the resistance between SFL+ and
SFL–.
OK:
Resistance: Below 1 Ω
NG
Repair or replace harness or connector be-
tween side airbag assembly (LH) and airbag
sensor assembly.
OK
DI6PG–03
AB0119
H01074
H10600
H01017
H16278
H16624
Squib (LH)
Airbag
Sensor
Assembly
SFL+
CG
DTC B0116/48
→
←
DLC3
ON
SFL–
Tc
DI–366
–
DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
LEXUS RX300 (RM785E)
3
Check airbag sensor assembly.
PREPARATION:
(a)
Connect the connector to the airbag sensor assembly.
(b)
Using a service wire, connect SFL+ and SFL– of the con-
nector (on the side airbag assembly side) between the
side airbag assembly (LH) and the airbag sensor assem-
bly.
(c)
Connect negative (–) terminal cable to the battery, and
wait at least 2 seconds.
CHECK:
(a)
Turn the ignition switch to ON and wait at least for 20 se-
conds.
(b)
Clear the DTC stored in memory (See page DI–305).
(c)
Turn the ignition switch to LOCK, and wait at least for 20
seconds.
(d)
Turn the ignition switch to ON, and wait at least for 20 se-
conds.
(e)
Check the DTC (See page DI–305).
OK:
DTC B0116/48 is not output.
HINT:
Codes other than code B0116/48 may be output at this time, but
they are not relevant to this check.
NG
Replace side airbag sensor assembly.
OK
H10600 H01074
H01018 AB0119
H12028
→ ←
Airbag
Sensor
Assembly
Squib (LH)
ON
DLC3
DTC B0116/48
Tc
CG
–
DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
DI–367
LEXUS RX300 (RM785E)
4
Check side squib (LH).
PREPARATION:
(a)
Turn the ignition switch to LOCK.
(b)
Disconnect negative (–) terminal cable from the battery,
and wait at least for 90 seconds.
(c)
Connect the side airbag assembly (LH) connector.
(d)
Connect negative (–) terminal cable to the battery, and
wait at least for 2 seconds.
CHECK:
(a)
Turn the ignition switch to ON, and wait at least for 20 se-
conds.
(b)
Clear the DTC stored in memory (See page DI–305).
(c)
Turn the ignition switch to LOCK, and wait at least for 20
seconds.
(d)
Turn the ignition switch to ON, and wait at least for 20 se-
conds.
(e)
Check the DTC (See page DI–305).
OK:
DTC B0116/48 is not output.
HINT:
Codes other than code B0116/48 may be output at this time, but
they are not relevant to this check.
NG
Replace side airbag assembly (LH).
OK
From the results of the above inspection, the malfunctioning part can now be considered normal.
To make sure of this, use the simulation method to check.
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