Subaru BRZ Electrical Manual — part 67

NOTICE : When inspecting or repairing the SRS, perform service in accordance with the following precautionary instructions
and the procedure, and precautions in the Repair Manual applicable for the model year.

● Malfunction symptoms of the SRS are difficult to confirm, so the DTCs become the most important source of information

when troubleshooting. When troubleshooting the SRS, always inspect the DTCs before disconnecting the battery.

● Work must be started more than 90 seconds after the ignition or starter switch assembly is turned to the ”LOCK”

position (Ignition switch type) or the engine switch is pushed to the ”OFF” position (Engine switch type) and the
negative (-) terminal cable is disconnected from the battery.
(The SRS is equipped with a back-up power source so that if work is started within 90 seconds from disconnecting
the negative (-) terminal cable of the battery, the SRS may deploy.)

● When the negative (-) terminal cable is disconnected from the battery, the memory of the clock and audio system will be

cleared. So before starting work, make a record of the contents in the audio memory system. When work is finished, reset
the audio systems as they were before and adjust the clock. Some vehicles have power tilt steering, power telescopic
steering, power seat and power outside rear view mirror which are all equipped with memory function. However, it is not
possible to make a record of these memory contents. So when the work is finished, it will be necessary to explain it to your
customer, and ask the customer to adjust the features and reset the memory. To avoid erasing the memory in each system,
never use a back-up power supply from outside the vehicle.

● Before repair, remove the airbag sensor if shocks are likely to be applied to the sensor during repair.

● Do not expose the following parts directly to hot air or flame;

● Even in cases of a minor collision where the SRS does not deploy, the following parts should be inspected;

● Never use SRS parts from another vehicle. When replacing parts, replace with new parts.

● For the purpose of reuse, never disassemble and repair the following parts.

● If the following parts have been dropped, or have cracks, dents and other defects in their case, bracket, and connector,

replace with new one.

● Use a volt/ohmmeter with high impedance (10 kΩ/V minimum) for troubleshooting electrical circuits of the system.

● Information labels are attached to the periphery of the SRS components. Follow the instructions of the notice.

● After work on the SRS is completed, check the SRS warning light.

● If the vehicle is equipped with a mobile communication system, refer to the precaution in the IN section of the Repair Manual.

* Driver’s Airbag Module
* Passenger’s Airbag Module
* Side Airbag Module
* Curtain Airbag Module
* Pretensioner
* Airbag Control Module
* Front Sub Sensor
* Side Airbag Sensor
* Curtain Airbag Sensor
* Front Door Impact Sensor
* Driver’s Knee Airbag Module
* Satellite Safing Sensor

SRS

BRZ (G4400GE)

265

A

21

D4

26

25

B

B–

W

A

A

D3

L

G

A

12

A

14

(

∗

3

)

D37

2

1

(

∗

3

)

IG

MSW+

MSW–

GND

GND

MSW–

MSW+

D27(A), G1(B), H17(C)

15A
A/B MAIN

1

2

7 3A

24 3C

R–

B

LG–

B

(IG)

Y

W

4 A

3 A

2 B

1 B

D5

2

(A

), z6

(B

)

D+

D–

A

5

A

6

D–

D+

Airbag Control Module

Airbag Cut Off Switch

R

o

ll C

onnector

Driver' s Airbag Module

z6(B)

SRS

BRZ (G4400GE)

266

DA3

W–B

R–

Y

DA3

2

1

A51

A

W–B

29

3

A

R–

Y

27

L–

Y

L–

W

1

2

A58

A

L–

Y

28

A

L–

W

30

1

DA3

2

4 DA3

2 C

1 C

2

1

Y–

R

Y–

G

A

10

O

A

9

R

2

1

∗

3 : w/ Airbag Cut Off Switch

∗

4 : w/ Driver' s Knee Airbag Module

(

∗

4

)

H22

Pretensioner

(

∗

4

)

DK–

SL+

SL–

DK+

SR–

SR+

BUSIN

RTNIN

RTNIN

BUSIN

PL+

PL–

D27(A), G1(B), H17(C)

Y–

B

Y–

V

2 A

3 A

P–

P+

Y

Y

P–

P+

A

3

A

4

DK–

DK+

Airbag Control Module

Front Sub Sensor RH

Front Sub Sensor LH

Pretensioner LH

Passenger' s Airbag Module

D30(A)

Driver' s Knee Airbag Module

D62

BRZ (G4400GE)

267

Y–

R

9 B

Y–

G

10 B

D27(A), G1(B), H17(C)

4 B

5 B

2

1

Y–

B

Y

Y

7 C

Y–

B

6 C

1

8 C

15 C

Y–

G

Y–

B

4

3

Y–

R

Y

1

2

G11

2

H30

4

H2

3

3

1

2

Y–

B

Y–

R

1

F2

2

Y–

G

Y–

R

1

2

G14

3

G16

4

Y

H2

5

2

1

Y–

G

Y–

B

2

E4

1

Y–

R

Y–

B

Y–

B

3

4

Y–

R

Y–

G

B

11

B

8

G17

2

1

Pretensioner

H16

2

1

Y–

R

12 C

Y–

G

11 C

BBL2–

BBL2+

ICL+

ICL–

ICR+

ICR–

PR+

PR–

BBL+

BBL–

BBR+

BBR–

BUSIN

RTNIN

RTNOUT

BUSIN

RTNIN

BUSIN

RTNIN

BUSOUT

BUSIN

RTNIN

BUSIN

RTNIN

BUSIN

RTNIN

RTNOUT

RTNOUT

BUSOUT

BUSOUT

RTNOUT

BUSOUT

EH1

2

EH1

1

FG1

2

FG1

1

BUSIN

RTNIN

ICL–

ICL+

ICR–

ICR+

Airbag Control Module

Fr

ont D

oor

Im

pact S

ensor

L

H

Fr

ont D

oor

Im

pact S

ensor

R

H

Curtain Airbag Module RH

C

ur

tai

n A

ir

bag

S

ensor

R

H

S

ide A

ir

bag S

ensor

R

H

Pretensioner RH

Satellite Safing Sensor

S

ide A

ir

bag S

ensor

L

H

C

ur

tai

n A

ir

bag

S

ensor

L

H

Curtain Airbag Module LH

SRS

BRZ (G4400GE)

268