Lexus RX300 (MCU15). Manual — part 285
AB0119
H01017
H01072
H10600
H16278
H16628
Squib (LH)
Airbag
Sensor
Assembly
SFL+
CG
Tc
DTC B0118/46
→
←
SFL–
ON
DLC3
DI–372
–
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 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 step 5 on 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 B0118/46 is not output.
HINT:
Codes other than code B0118/46 may be output at this time, but
they are not relevant to this check.
NG
Replace airbag sensor assembly.
OK
H01018 AB0119
H01072
H10600
H13118
→ ←
Airbag
Sensor
Assembly
Squib (LH)
DTC B0118/46
ON
DLC3
Tc
CG
–
DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
DI–373
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 step 5 on 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 B0118/46 is not output.
HINT:
Codes other than code B0118/46 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. If the malfunctioning part can not be
detected by the simulation method, replace all SRS components including the wire harness.
H01454
P/T Squib (RH)
Airbag Sensor Assembly
PR+
PR–
1
2
6
5
A29
Y–B
Y
A29
DI–374
–
DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
LEXUS RX300 (RM785E)
DTC
B0130/63
Short in P/T Squib (RH) Circuit
CIRCUIT DESCRIPTION
The P/T squib (RH) circuit consists of the airbag sensor assembly and seat belt pretensioner (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 B0130/63 is recorded when a short is detected in the P/T squib (RH) circuit.
DTC No.
DTC Detecting Condition
Trouble Area
B0130/63
S Short circuit between PR+ wire harness and PR– wire
harness of squib
S P/T squib (RH) malfunction
S Airbag sensor assembly malfunction
S Seat belt pretensioner (RH)
S Airbag sensor assembly
S Wire harness
WIRING DIAGRAM
DI6PJ–07
H01019
H16270
H16629
P/T Squib (RH)
Airbag
Sensor
Assembly
PR+
PR–
(+)
(–)
–
DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
DI–375
LEXUS RX300 (RM785E)
INSPECTION PROCEDURE
1
Prepare for inspection (See step 1 on page DI–431).
2
Check P/T squib (RH) circuit.
PREPARATION:
Release the airbag activation prevention mechanism of the
connector (on the airbag sensor assembly side) between the
airbag sensor assembly and the seat belt pretensioner (RH)
(See page DI–305).
CHECK:
For the connector (on the seat belt pretensioner side) between
the seat belt pretensioner (RH) and the airbag sensor assem-
bly, measure the resistance between PR+ and PR–.
OK:
Resistance: 1 MΩ or Higher
NG
Repair or replace harness or connector be-
tween seat belt pretensioner (RH) and airbag
sensor assembly.
OK
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