Lexus RX300 (MCU15). Service manual - part 270

DI–312

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

LEXUS RX300   (RM785E)

DTC No. 

(See Page)

Detection Item

Trouble Area

SRS 

Warning Light

B0117/45 

(DI–368)

S Short in side squib (LH) circuit 

(to ground)

S Side airbag assembly LH (squib)

S Airbag sensor assembly

S Wire harness

Blink

B0118/46 

(DI–371)

S Short in side squib (LH) circuit 

(to B+)

S Side airbag assembly LH (squib)

S Airbag sensor assembly

S Wire harness

Blink

B0130/63 

(DI–374)

S Short in P/T squib (RH) circuit

S Seat belt pretensioner RH (squib)

S Airbag sensor assembly

S Wire harness

Blink

B0131/64 

(DI–378)

S Open in P/T squib (RH) circuit

S Seat belt pretensioner RH (squib)

S Airbag sensor assembly

S Wire harness

Blink

B0132/61 

(DI–381)

S Short in P/T squib (RH) circuit 

(to ground)

S Seat belt pretensioner RH (squib)

S Airbag sensor assembly

S Wire harness

Blink

B0133/62 

(DI–384)

S Short in P/T squib (RH) circuit 

(to B+)

S Seat belt pretensioner RH (squib)

S Airbag sensor assembly

S Wire harness

Blink

B0135/73 

(DI–387)

S Short in P/T squib (LH) circuit

S Seat belt pretensioner LH (squib)

S Airbag sensor assembly

S Wire harness

Blink

B0136/74 

(DI–391)

S Open in P/T squib (LH) circuit

S Seat belt pretensioner LH (squib)

S Airbag sensor assembly

S Wire harness

Blink

B0137/71 

(DI–394)

S Short in P/T squib (LH) circuit 

(to ground)

S Seat belt pretensioner LH (squib)

S Airbag sensor assembly

S Wire harness

Blink

B0138/72 

(DI–397)

S Short in P/T squib (LH) circuit 

(to B+)

S Seat belt pretensioner LH (squib)

S Airbag sensor assembly

S Wire harness

Blink

B1100/31 

(DI–400)

S Airbag sensor assembly malfunction

S Airbag sensor assembly

ON

B1140/32 

(DI–402)

S Side airbag sensor assembly (RH)

malfunction

S Side airbag sensor assembly (RH)

S Airbag sensor assembly

S Wire harness

Blink

B1141/33 

(DI–410)

S Side airbag sensor assembly (LH)

malfunction

S Side airbag sensor assembly (LH)

S Airbag sensor assembly

S Wire harness

Blink

B1156/B1157/

15 

(DI–418)

S Front airbag sensor (RH) malfunction

S Front airbag sensor (RH)

S Airbag sensor assembly

S Instrument panel wire harness

S Engine room No. 2 wire harness

ON

B1158/B1159/

16 

(DI–426)

S Front airbag sensor (LH) malfunction

S Front airbag sensor (LH)

S Airbag sensor assembly

S Instrument panel wire harness

ON

Normal

S System normal

–

OFF

Normal 

(DI–431)

S Voltage source drop

S Battery

S Airbag sensor assembly

ON

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

DI–313

LEXUS RX300   (RM785E)

HINT:

S

When the SRS warning light remains lit up and the DTC is the normal code, this means a voltage source
drops. 
This malfunction is not stored in memory by the airbag sensor assembly and if the power source volt-
age returns to normal, the SRS warning light will automatically go out.

S

When 2 or more codes are indicated, the codes will be displayed in numeral order starting from the
lowest numbered code.

S

If a code not listed on the chart is displayed, the airbag sensor assembly is faulty.

DI6P0–07

H05133

Spiral Cable

Combination Meter
(Warning Light)

Front Passenger Airbag Assembly

Side Airbag Assembly (RH)

Side Airbag Sensor
Assembly (RH)

Seat Belt Pretensioner (RH)

Steering Wheel Pad
(with Airbag)

Side Airbag Sensor
Assembly (LH)

Seat Belt 
Pretensioner (LH)

Side Airbag Assembly (LH)

Airbag Sensor Assembly

Front Airbag Sensor (RH)

Front Airbag
Sensor (LH)

DI–314

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

LEXUS RX300   (RM785E)

PARTS LOCATION

DI6P1–08

H01357

A28

A27

A29

28

7

8

9

10

16

17

18

A

B

1

2

3

4

5

6

11

12

15 14

13

A

A

B

B

19

20

21

22

23

24

25

26

27

1

2

3

4

5

6

7

8

9

10

11

12

1

2

3

4

5

6

7

8

9

10

11

12

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

DI–315

LEXUS RX300   (RM785E)

TERMINALS OF ECU

No.

Symbol

Terminal Name

A

–

Electrical Connector Check Mechanism

B

–

Electrical Connector Check Mechanism

A28 – 3

LA

SRS Warning Light

A28 – 5

IG2

Power Source

A28 – 6

IG1

Power Source

A28 – 9

+SR

Front Airbag Sensor (RH)

A28 – 10

P+

Squib (Passenger)

A28 – 11

P–

Squib (Passenger)

A28 – 12

SIL

Diagnosis

A28 – 13

D–

Squib (Driver)

A28 – 14

D+

Squib (Driver)

A28 – 15

+SL

Front Airbag Sensor (LH)

A28 – 19

Tc

Diagnosis

A28 – 20

–SR

Front Airbag Sensor (RH)

A28 – 23

GSW2

ECM

A28 – 26

–SL

Front Airbag Sensor (LH)

A28 – 27

E1

Ground

A28 – 28

E2

Ground

A27 – 1

PL–

Squib (Seat Belt Pretensioner, LH)

A27 – 2

PL+

Squib (Seat Belt Pretensioner, LH)

A27 – 5

SFL–

Squib (Side, LH)

A27 – 6

SFL+

Squib (Side, LH)

A27 – 7

VUPL

Side Airbag Sensor (LH)

A27 – 9

SSL+

Side Airbag Sensor (LH)

A27 – 10

FSL

Side Airbag Sensor (LH)