Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Service manual — part 626
AB(diag)-43
List of Diagnostic Trouble Code (DTC)
AIRBAG SYSTEM (DIAGNOSTICS)
71
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.>
72
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.>
75
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.>
76
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.>
7A
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.>
7B
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.>
7D
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.>
7E
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.>
91
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.>
92
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.>
95
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)
96
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.>
9A
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.>
9B
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.>
9D
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.>
9E
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.>
A1
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.
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.
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.
E9
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.
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.
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
• 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.
F1
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.
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.
F5
F6
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.
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.
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
No
1
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.
AB6
18 19 20
21 22 23 24 25 26 27 28
1 2 3
5 6 7 8
10
9
4
11 12 13 14
16 17
15
29 30
2
1
AB38
2
1
AB37
AB2
1 2 3 4
1
2
3
4
AB7
AB2
6
5
8
7
AB38
2
1
2
1
AB37
AB6
AB-02487
AIRBAG CM
ROLL
CONNECTOR
DRIVER'S AIRBAG MODULE
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