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