Lexus RX300 (MCU15). Manual — part 280
H01019
H16275
H16616
Squib (RH)
Airbag
Sensor
Assembly
(–)
(+)
SFR+
SFR–
DI–352
–
DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
LEXUS RX300 (RM785E)
DTC
B0111/44
Open in Side Squib (RH) Circuit
CIRCUIT DESCRIPTION
The side squib (RH) circuit consists of the airbag sensor assembly and side airbag assembly (RH).
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 B0111/44 is recorded when an open is detected in the side squib (RH) circuit.
DTC No.
DTC Detecting Condition
Trouble Area
B0111/44
S Open circuit in SFR+ wire harness or SFR– wire harness
of squib
S Side squib (RH) malfunction
S Airbag sensor assembly malfunction
S Side airbag assembly (RH)
S Airbag sensor assembly
S Wire harness
WIRING DIAGRAM
See page DI–348.
INSPECTION PROCEDURE
1
Prepare for inspection (See step 1 on page DI–431).
2
Check front side squib (RH) circuit.
CHECK:
For the connector (on the front side airbag assembly side) be-
tween the front side airbag assembly (RH) and the airbag sen-
sor assembly, measure the resistance between SFR+ and
SFR–.
OK:
Resistance: Below 1 Ω
NG
Repair or replace harness or connector be-
tween side airbag assembly (RH) and airbag
sensor assembly.
OK
DI6PC–03
AB0119
H01070
H10600
H01020
H16278
H16617
Squib (RH)
Airbag
Sensor
Assembly
SFR+
SFR–
DTC B0111/44
→
←
ON
DLC3
CG
Tc
–
DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
DI–353
LEXUS RX300 (RM785E)
3
Check airbag sensor assembly.
PREPARATION:
(a)
Connect the connector to the airbag sensor assembly.
(b)
Using a service wire, connect SFR+ and SFR– of the con-
nector (on the side airbag assembly side) between the
side airbag assembly (RH) and the airbag sensor assem-
bly.
(c)
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 B0111/44 is not output.
HINT:
4Codes other than code B0111/44 may be output at this time,
but they are not relevant to this check.
NG
Replace airbag sensor assembly.
OK
H10600
H01021
H01070
AB0119
H12020
→ ←
Squib (RH)
Airbag
Sensor
Assembly
DTC B0111/44
ON
DLC3
CG
Tc
DI–354
–
DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
LEXUS RX300 (RM785E)
4
Check side squib (RH).
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 (RH) 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 or ON, and wait at least for 20
seconds.
(e)
Check the DTC (See page DI–305).
OK:
DTC B0111/44 is not output.
HINT:
Codes other than code B0111/44 may be output at this time, but
they are not relevant to this check.
NG
Replace side airbag assembly (RH).
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
H16276
H16618
Airbag
Sensor
Assembly
Squib (RH)
(+)
SFR+
(–)
–
DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
DI–355
LEXUS RX300 (RM785E)
DTC
B0112/41
Short in Side Squib (RH) Circuit
(to Ground)
CIRCUIT DESCRIPTION
The side squib (RH) circuit consists of the airbag sensor assembly and side airbag assembly (RH).
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 B0112/41 is recorded when ground short is detected in the side squib (RH) circuit.
DTC No.
DTC Detecting Condition
Trouble Area
B0112/41
S Short circuit in side squib (RH) wire harness (to ground)
S Side squib (RH) malfunction
S Airbag sensor assembly malfunction
S Side airbag assembly (RH)
S Airbag sensor assembly
S Wire harness
WIRING DIAGRAM
See page DI–348.
INSPECTION PROCEDURE
1
Prepare for inspection (See step 1 on page DI–431).
2
Check side squib (RH) circuit.
CHECK:
For the connector (on the side airbag assembly side) between
the side airbag assembly (RH) and the airbag sensor assembly,
measure the resistance between SFR+ and body ground.
OK:
Resistance: 1 MΩ or Higher
NG
Repair or replace harness or connector be-
tween side airbag assembly (RH) and airbag
sensor assembly.
OK
DI6PD–03
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