Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Manual - part 626

AB(diag)-43

List of Diagnostic Trouble Code (DTC)

AIRBAG SYSTEM (DIAGNOSTICS)

Driver’s Airbag failure

• Airbag main harness circuit is shorted to ground.
• Airbag module harness (driver’s side) circuit is
shorted to ground.
• Roll connector circuit is shorted to ground.
• Driver’s airbag module is faulty.
• Airbag control module is faulty.

<Ref. to AB(diag)-109, DTC 71
DRIVER’S AIRBAG FAILURE,
Diagnostic Chart with Trouble
Code.>

Passenger’s Airbag failure • Airbag main harness circuit is shorted to ground.

• Airbag module harness (passenger’s side) circuit is
shorted to ground.
• Passenger’s airbag module is faulty.
• Airbag control module is faulty.

<Ref. to AB(diag)-112, DTC 72
PASSENGER’S AIRBAG FAIL-
URE, Diagnostic Chart with Trou-
ble Code.>

Driver’s Airbag failure

• Airbag main harness circuit is shorted to power
supply.
• Airbag module harness circuit (driver’s side) is
shorted to power supply.
• Roll connector circuit is shorted to power supply.
• Driver’s airbag module is faulty.
• Airbag control module is faulty.

<Ref. to AB(diag)-114, DTC 75
DRIVER’S AIRBAG FAILURE,
Diagnostic Chart with Trouble
Code.>

Passenger’s Airbag failure • Airbag main harness circuit is shorted to power

supply.
• Airbag module harness (passenger’s side) circuit is
shorted to power supply.
• Passenger’s airbag module is faulty.
• Airbag control module is faulty.

<Ref. to AB(diag)-117, DTC 76
PASSENGER’S AIRBAG FAIL-
URE, Diagnostic Chart with Trou-
ble Code.>

Driver’s Airbag failure

• Airbag main harness circuit is shorted.
• Airbag module harness (driver’s side) circuit is
shorted.
• Roll connector circuit is shorted to power supply.
• Driver’s airbag module is faulty.
• Airbag control module is faulty.

<Ref. to AB(diag)-119, DTC 7A
DRIVER’S AIRBAG FAILURE,
Diagnostic Chart with Trouble
Code.>

Passenger’s Airbag failure • Airbag main harness circuit is shorted.

• Airbag module harness circuit (passenger’s side) is
shorted.
• Passenger’s airbag module is faulty.
• Airbag control module is faulty.

<Ref. to AB(diag)-122, DTC 7B
PASSENGER’S AIRBAG FAIL-
URE, Diagnostic Chart with Trou-
ble Code.>

Driver’s Airbag failure

• Airbag main harness circuit is open.
• Airbag module harness circuit (driver’s side) is
open.
• Roll connector circuit is open.
• Driver’s airbag module is faulty.
• Airbag control module is faulty.

<Ref. to AB(diag)-124, DTC 7D
DRIVER’S AIRBAG FAILURE,
Diagnostic Chart with Trouble
Code.>

Passenger’s Airbag failure • Airbag main harness circuit is open.

• Airbag module harness circuit (passenger’s side) is
open.
• Passenger’s airbag module is faulty.
• Airbag control module is faulty.

<Ref. to AB(diag)-127, DTC 7E
PASSENGER’S AIRBAG FAIL-
URE, Diagnostic Chart with Trou-
ble Code.>

Curtain Airbag RH failure • Curtain airbag harness (RH) circuit is shorted to

ground.
• Curtain airbag module (RH) is faulty.
• Airbag control module is faulty.

<Ref. to AB(diag)-129, DTC 91
CURTAIN AIRBAG MODULE RH
FAILURE, Diagnostic Chart with
Trouble Code.>

Curtain Airbag LH failure

• Curtain airbag harness (LH) circuit is shorted to
ground.
• Curtain airbag module (LH) is faulty.
• Airbag control module is faulty.

<Ref. to AB(diag)-131, DTC 92
CURTAIN AIRBAG MODULE LH
FAILURE, Diagnostic Chart with
Trouble Code.>

Curtain Airbag RH failure • Curtain airbag harness (RH) is shorted to power

supply.
• Curtain airbag module (RH) is faulty.
• Airbag control module is faulty.

<Ref. to AB(diag)-133, DTC 95
CURTAIN AIRBAG MODULE RH
FAILURE, Diagnostic Chart with
Trouble Code.>

DTC

Item

Content of diagnosis

Reference

AB(diag)-44

List of Diagnostic Trouble Code (DTC)

AIRBAG SYSTEM (DIAGNOSTICS)

Curtain Airbag LH failure

• Curtain airbag harness (LH) is shorted to power
supply.
• Curtain airbag module (LH) is faulty.
• Airbag control module is faulty.

<Ref. to AB(diag)-135, DTC 96
CURTAIN AIRBAG MODULE LH
FAILURE, Diagnostic Chart with
Trouble Code.>

Curtain Airbag RH failure • Curtain airbag harness (RH) circuit is shorted.

• Curtain airbag module (RH) is faulty.
• Airbag control module is faulty.

<Ref. to AB(diag)-137, DTC 9A
CURTAIN AIRBAG MODULE RH
FAILURE, Diagnostic Chart with
Trouble Code.>

Curtain Airbag LH failure

• Curtain airbag harness (LH) circuit is shorted.
• Curtain airbag module (LH) is faulty.
• Airbag control module is faulty.

<Ref. to AB(diag)-139, DTC 9B
CURTAIN AIRBAG MODULE LH
FAILURE, Diagnostic Chart with
Trouble Code.>

Curtain Airbag RH failure • Curtain airbag harness (RH) circuit is open.

• Curtain airbag module (RH) is faulty.
• Airbag control module is faulty.

<Ref. to AB(diag)-141, DTC 9D
CURTAIN AIRBAG MODULE RH
FAILURE, Diagnostic Chart with
Trouble Code.>

Curtain Airbag LH failure

• Curtain airbag harness (LH) circuit is open.
• Curtain airbag module (LH) is faulty.
• Airbag control module is faulty.

<Ref. to AB(diag)-143, DTC 9E
CURTAIN AIRBAG MODULE LH
FAILURE, Diagnostic Chart with
Trouble Code.>

Front sensor Bus commu-

nication error

• Open or short circuit in harness between airbag
control module and front sub sensor.
• Front sub sensor is faulty.
• Airbag control module is faulty.

<Ref. to AB(diag)-145, DTC A1
FRONT SENSOR BUS COMMU-
NICATION ERROR, Diagnostic
Chart with Trouble Code.>

E3
E4

Front Sensor Bus RH

Communication error

• Open or short circuit in harness (RH) between air-
bag control module and front sub sensor.
• Front sub sensor (RH) is faulty.
• Airbag control module is faulty.

<Ref. to AB(diag)-147, DTC E3
FRONT SENSOR BUS RH COM-
MUNICATION ERROR, Diagnostic
Chart with Trouble Code.> <Ref. to
AB(diag)-147, DTC E4 FRONT
SENSOR BUS RH COMMUNICA-
TION ERROR, Diagnostic Chart
with Trouble Code.>

E7
E8

Front Sensor Bus LH
Communication error

• Open or short circuit in harness (LH) between air-
bag control module and front sub sensor.
• Front sub sensor (LH) is faulty.
• Airbag control module is faulty.

<Ref. to AB(diag)-148, DTC E7
FRONT SENSOR BUS LH COM-
MUNICATION ERROR, Diagnostic
Chart with Trouble Code.> <Ref. to
AB(diag)-150, DTC E8 FRONT
SENSOR BUS LH COMMUNICA-
TION ERROR, Diagnostic Chart
with Trouble Code.>

Side Sensor Bus RH

Communication error

• Open or short circuit in harness (RH) between air-
bag control module and curtain airbag sensor.
• Side airbag sensor (RH) is faulty.
• Curtain airbag sensor (RH) is faulty.
• Airbag control module is faulty.

<Ref. to AB(diag)-150, DTC E9
SIDE SENSOR BUS RH COMMU-
NICATION ERROR, Diagnostic
Chart with Trouble Code.>

EB
EC

Side Sensor Bus RH

Communication error

• Open or short circuit in harness (RH) between air-
bag control module and side airbag sensor.
• Side airbag sensor (RH) is faulty.
• Airbag control module is faulty.

<Ref. to AB(diag)-150, DTC EB
SIDE SENSOR BUS RH COMMU-
NICATION ERROR, Diagnostic
Chart with Trouble Code.> <Ref. to
AB(diag)-151, DTC EC SIDE SEN-
SOR BUS RH COMMUNICATION
ERROR, Diagnostic Chart with
Trouble Code.>

DTC

Item

Content of diagnosis

Reference

AB(diag)-45

List of Diagnostic Trouble Code (DTC)

AIRBAG SYSTEM (DIAGNOSTICS)

ED
EE

Side Sensor Bus RH

Communication error

<Ref. to AB(diag)-153, DTC ED
SIDE SENSOR BUS RH COMMU-
NICATION ERROR, Diagnostic
Chart with Trouble Code.>
<Ref. to AB(diag)-154, DTC EE
SIDE SENSOR BUS RH COMMU-
NICATION ERROR, Diagnostic
Chart with Trouble Code.>

Side Sensor Bus LH

Communication error

• Open or short circuit in harness (LH) between air-
bag control module and curtain airbag sensor.
• Side airbag sensor (LH) is faulty.
• Curtain airbag sensor (LH) is faulty.
• Airbag control module is faulty.

<Ref. to AB(diag)-157, DTC F1
SIDE SENSOR BUS LH COMMU-
NICATION ERROR, Diagnostic
Chart with Trouble Code.>

F3
F4

Side Sensor Bus LH

Communication error

• Open or short circuit in harness (LH) between air-
bag control module and side airbag sensor.
• Side airbag sensor (LH) is faulty.
• Airbag control module is faulty.

<Ref. to AB(diag)-157, DTC F3
SIDE SENSOR BUS LH COMMU-
NICATION ERROR, Diagnostic
Chart with Trouble Code.> <Ref. to
AB(diag)-158, DTC F4 SIDE SEN-
SOR BUS LH COMMUNICATION
ERROR, Diagnostic Chart with
Trouble Code.>

F5
F6

Side Sensor Bus LH

Communication error

<Ref. to AB(diag)-160, DTC F5
SIDE SENSOR BUS LH COMMU-
NICATION ERROR, Diagnostic
Chart with Trouble Code.>
<Ref. to AB(diag)-161, DTC F6
SIDE SENSOR BUS LH COMMU-
NICATION ERROR, Diagnostic
Chart with Trouble Code.>

F7
F8
F9
FA

Satellite Sensor Bus

Communication error

• Open or short circuit in harness between airbag
control module and satellite safing sensor.
• Satellite safing sensor is faulty.
• Airbag control module is faulty.

<Ref. to AB(diag)-164, DTC F7
SATELLITE SENSOR BUS COM-
MUNICATION ERROR, Diagnostic
Chart with Trouble Code.>
<Ref. to AB(diag)-164, DTC F8
SATELLITE SENSOR BUS COM-
MUNICATION ERROR, Diagnostic
Chart with Trouble Code.>
<Ref. to AB(diag)-164, DTC F9
SATELLITE SENSOR BUS COM-
MUNICATION ERROR, Diagnostic
Chart with Trouble Code.>
<Ref. to AB(diag)-165, DTC FA
SATELLITE SENSOR BUS COM-
MUNICATION ERROR, Diagnostic
Chart with Trouble Code.>

DTC

Item

Content of diagnosis

Reference

AB(diag)-46

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

14.Diagnostic Chart with Trouble Code

A: DTC 11 DRIVER’S AIRBAG FAILURE

DTC DETECTING CONDITION:

• Airbag main harness circuit is shorted to ground.

• Airbag module harness (driver’s side) circuit is shorted to ground.

• Roll connector circuit is shorted to ground.

• Driver’s airbag module is faulty.

• Airbag control module is faulty.
CAUTION:

• Before diagnosing the airbag system, be sure to turn the ignition switch to OFF, disconnect the

ground cable from battery, and wait 60 seconds or more before starting to work.

• When replacing the airbag module, seat belt pretensioner, roll connector, control module and sen-

sor, reconnect each part and check that the warning light operates properly.

• When inspecting the airbag main harness, disconnect the airbag module connectors of the driver’s

and passenger’s seats for safety.

• When inspecting the airbag rear harness, disconnect the side airbag module connector, curtain

airbag module connector and seat belt pretensioner connector for safety reasons.
NOTE:

Prior to starting work, prepare two AIRBAG RESISTORs (98299PA040).

WIRING DIAGRAM:

Airbag system <Ref. to WI-82, WIRING DIAGRAM, Airbag System.>

Step

Check

Yes

CHECK POOR CONTACT OF CONNEC-
TORS.
Check for poor contact of the connectors
between the airbag control module and the
driver’s airbag module.

Is there poor contact?

Replace the airbag
harness.

Go to step

AB6

18 19 20

21 22 23 24 25 26 27 28

1 2 3

5 6 7 8

11 12 13 14

16 17

29 30

AB38

AB37

AB2

1 2 3 4

AB7

AB2

AB38

AB37

AB6

AB-02487

AIRBAG CM

ROLL

CONNECTOR

DRIVER'S AIRBAG MODULE

Content .. 624 625 626 627 ..