AB(diag)-27
Airbag Connector
AIRBAG SYSTEM (DIAGNOSTICS)
3. DRIVER’S AIRBAG (BETWEEN AIRBAG
MAIN HARNESS AND ROLL CONNECTOR)
AND PASSENGER’S AIRBAG
1) How to disconnect:
(1) Push the slide lock (A) into the direction of
arrow.
(2) With the slide lock pushed, disconnect the
connector.
CAUTION:
When pulling the slide lock or disconnecting
connector, be sure to hold the connector, not
the harness.
2) How to connect:
Holding the connector, push it in securely until a
clicking sound is heard.
CAUTION:
Be sure to insert the connector in until it is
locked. Then pull it gently to make sure that it is
locked.
4. SIDE AIRBAG AND CURTAIN AIRBAG
1) How to disconnect:
(1) Push the lock arm (A).
(2) With the lock arm (A) pushed in, move the
slide lock (B) in the direction of arrow.
(3) While holding the slide lock in that position,
release the lock arm (back to the original posi-
tion), and disconnect the connector.
CAUTION:
When pulling the slide lock or disconnecting
connector, be sure to hold the connector, not
the harness.
AB-00722
(A)
AB-00022
AB-00023
AB-00017
(A)
(B)
AB-00018
AB(diag)-28
Airbag Connector
AIRBAG SYSTEM (DIAGNOSTICS)
5. FRONT SUB SENSOR, SIDE AIRBAG
SENSOR, CURTAIN AIRBAG SENSOR AND
SEAT POSITION SENSOR LH
1) How to disconnect:
Holding outer part (A), pull it in the direction of ar-
row.
CAUTION:
When pulling the slide lock or disconnecting
connector, be sure to hold the connector, not
the harness.
2) How to connect:
Holding the connector, push it in securely until a
clicking sound is heard.
CAUTION:
•Outer side (A) move back, and so do not put
your hand on the outer part.
•Be sure to insert the connector in until it is
locked. Then pull it gently to make sure that it is
locked.
AB-00024
AB-00025
AB(diag)-34
Subaru Select Monitor
AIRBAG SYSTEM (DIAGNOSTICS)
Step Check Yes No
1CHECK IGNITION SWITCH.Is the ignition switch ON? Go to step 2.Turn the ignition
switch to ON, and
select the airbag
mode using the
Subaru Select
Monitor.
2CHECK BATTERY.
1) Turn the ignition switch to OFF.
2) Measure the battery voltage.
Is the voltage more than 11 V? Go to step 3.Charge or replace
the battery.
3CHECK BATTERY TERMINAL.Is there poor contact at battery
terminal?
Repair or tighten
the battery termi-
nal.
Go to step 4.
4CHECK SUBARU SELECT MONITOR COM-
MUNICATION.
1) Turn the ignition switch to ON.
2) Using the Subaru Select Monitor, check
whether communication to other system can
be executed normally.
Are the system name and
model year displayed on Sub-
aru Select Monitor?
Go to step 9.Go to step 5.
5CHECK AIRBAG CONTROL MODULE CON-
NECTOR.
1) Turn the ignition switch to OFF, disconnect
the battery ground cable, and wait more than
20 seconds.
2) Is the connector of the air bag control mod-
ule (AB6) securely connected?
Is the connector of the air bag
control module securely con-
nected?
Go to step 6.Connect the con-
nector of the air-
bag control
module.
6CHECK SUBARU SELECT MONITOR COM-
MUNICATION.
1) Turn the ignition switch to OFF.
2) Disconnect the airbag control module con-
nector.
3) Turn the ignition switch to ON.
4) Check whether communication to other
systems can be executed normally.
Are the system name and
model year displayed on Sub-
aru Select Monitor?
Replace the airbag
control module.
Module.>
Go to step 7.
7CHECK HARNESS CONNECTOR BETWEEN
EACH CONTROL MODULE AND DATA LINK
CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the airbag control module,
ABSCM&H/U, ECM and TCM.
3) Measure the resistance between data link
connector and chassis ground.
Connector & terminal
(B40) No. 10 — Chassis ground:
Is the resistance more than 1
MΩ?
Go to step 8.Repair the har-
ness and connec-
tor between each
control module
and data link con-
nector. (Replace
the harness with-
out repairing the
airbag harness.)
8CHECK THE OUTPUT SIGNAL TO THE AIR-
BAG CONTROL MODULE.
1) Turn the ignition switch to ON in the status
of step 7.
2) Measure the voltage between data link con-
nector and chassis ground.
Connector & terminal
(B40) No. 10 (+) — Chassis ground (–):
Is the voltage less than 1 V? Go to step 9.Repair the har-
ness and connec-
tor between each
control module
and data link con-
nector. (Replace
the harness with-
out repairing the
airbag harness.)
AB(diag)-45
List of Diagnostic Trouble Code (DTC)
AIRBAG SYSTEM (DIAGNOSTICS)
13.List of Diagnostic Trouble Code (DTC)
A: LIST
DTC Display Content of diagnosis Reference target
11 Driver’s Airbag failure • Airbag main harness circuit is open, shorted
or shorted to ground.
•Airbag module harness (Driver's side) circuit
is open, shorted or shorted to ground.
•Roll connector circuit is open, shorted or
shorted to ground.
•Airbag control module is faulty.
•Driver's airbag module is faulty.
with Trouble Code.>
12 Passenger's Airbag failure • Airbag main harness circuit is open, shorted
or shorted to ground.
•Airbag module harness (Passenger's side)
circuit is open, shorted or shorted to ground.
•Airbag control module is faulty.
•Passenger's airbag module is faulty.
Chart with Trouble Code.>
15 Driver’s Airbag failure • Airbag main harness circuit (Driver’s side) is
shorted to power supply.
•Airbag module harness circuit (Driver’s side)
is shorted to power supply.
•Roll connector is shorted to power supply.
•Airbag control module is faulty.
•Driver’s airbag module is faulty.
with Trouble Code.>
16 Passenger's Airbag failure • Airbag main harness circuit (Passenger's
side) is shorted to power supply.
•Airbag module harness circuit (Passenger's
side) is shorted to power supply.
•Airbag control module is faulty.
•Passenger's airbag module is faulty.
Chart with Trouble Code.>
21 Airbag ECU failure Airbag control module is faulty.
Tr o u b l e C o d e . >
22 Front Airbag Firing output Front airbag module and seat belt pretensioner
(LH/RH) are inflated.
Chart with Trouble Code.>
23 Connector to Airbag ECU
failure
Connection of (AB6), (AB17) and (AB18) to air-
bag control module is improper.
nostic Chart with Trouble Code.>
24 IG1 open • Airbag control module is faulty.
•Airbag main harness circuit is open.
•Fuse No. 12 (in joint box) is blown.
•Airbag rear harness circuit is open.
Code.>
25 IG2 open • Airbag control module is faulty.
•Airbag main harness circuit is open.
•Fuse No. 25 (in joint box) is blown.
•Airbag rear harness circuit is open.
Code.>
26 Passenger's Airbag indi-
cator failure
•Passenger's airbag indicator is faulty.
•Airbag control module is faulty.
•Airbag main harness circuit is open, shorted
or shorted to ground.
•Body harness circuit is open.
Diagnostic Chart with Trouble Code.>
27 ODS Communication error • Occupant detection control module communi-
cation is faulty.
•Airbag rear harness circuit is open, shorted,
shorted to ground or shorted to power supply.
•Occupant detection harness is faulty.
•Airbag control module is faulty.
•Occupant detection system is faulty.
Chart with Trouble Code.>
AB(diag)-61
Diagnostic Chart with Trouble Code
AIRBAG SYSTEM (DIAGNOSTICS)
E: DTC 21 AIRBAG ECU FAILURE
DTC DETECTING CONDITION:
Airbag control module is faulty.
CAUTION:
•Before diagnosing the airbag system, be sure to turn the ignition switch to OFF, disconnect the
ground terminal from battery, and wait more than 20 seconds before starting to work.
•After replacing the airbag module, seat belt pretensioner, roll connector, control module and sen-
sor, reconnect each part and confirm that the warning light operates properly.
Step Check Yes No
1CHECK IF DTC 21 IS INDICATED.
Read the DTC.
OPERATION, Subaru Select Monitor.>
Is DTC 21 indicated for airbag
warning light?
Replace the airbag
control module.
Module.>
Per fo r m th e cl ea r
memory mode.
ORY MODE,
OPERATION,
Subaru Select
Monitor.>
AB(diag)-63
Diagnostic Chart with Trouble Code
AIRBAG SYSTEM (DIAGNOSTICS)
This DTC is indicated when the front airbag module and the pretensioner are deployed.
Once this DTC is displayed, the memory cannot be cleared. Therefore replace the following parts.
•Airbag control module
•Driver's airbag module
•Passenger's airbag module
•Front sub sensor of both sides
•Front seat belt outer with pretensioner of both sides.
•Steering roll connector
•Occupant detection system (passenger’s seat cushion & frame assembly)
G: DTC 23 CONNECTOR TO AIRBAG ECU FAILURE
DTC DETECTING CONDITION:
Connection of (AB6), (AB17) and (AB18) to airbag control module is improper.
CAUTION:
Before diagnosing the airbag system, be sure to turn the ignition switch to OFF, disconnect the
ground terminal from battery, and wait more than 20 seconds before starting to work.
Step Check Yes No
1CHECK POOR CONTACTS OF CONNEC-
TORS (AB6), (AB17) AND (AB18).
1) Turn the ignition switch to OFF, disconnect
the battery ground cable, and wait more than
20 seconds.
2) Disconnect the connectors (AB6), (AB17)
and (AB18) from airbag control module.
Is there rust or damage on the
harness connector and the
control module connector?
Replace the airbag
control module.
Module.> Replace
the body harness
with the airbag
main harness or
replace the body
harness with the
side airbag har-
ness.
Go to step 2.
2CHECK POOR CONTACTS OF CONNEC-
TORS (AB6), (AB17) AND (AB18).
1) Reconnect the connector securely.
2) Connect the battery ground terminal and
turn the ignition switch to ON.
Does the airbag warning light
illuminate for 6 seconds and go
off?
Go to step 3.Replace the airbag
control module.
Module.>
3CHECK AIRBAG CONTROL MODULE.
1) Connect all the connectors.
2) Erase the memory.
3) Perform the inspection mode.
4) Read the DTC.
Is the same DTC displayed? Replace the airbag
control module.
Module.>
Go to step 4.
4CHECK ANY OTHER DTC ON DISPLAY.Is any other DTC displayed? Check DTC using
“List of Diagnostic
Tr o u b l e C o d e
(DTC)”.
of Diagnostic Trou-
ble Code (DTC).>
Finish the diagno-
sis.
AB(diag)-69
Diagnostic Chart with Trouble Code
AIRBAG SYSTEM (DIAGNOSTICS)
Step Check Yes No
1CHECK POOR CONTACT.
1) Turn the ignition switch to OFF, disconnect
the battery ground cable, and wait more than
20 seconds.
2) Confirm that the connector that is between
the airbag control module and the passenger’s
side warning box is securely connected.
Is there poor contact in any
connector?
Replace the airbag
harness connec-
tor.
Go to step 2.
2CHECK AIRBAG MAIN HARNESS.
1) Disconnect the connector (AB6) from air-
bag control module.
2) Connect the battery ground terminal and
turn the ignition switch to ON.
NOTE:
Neither of ON/OFF illuminates when it is nor-
mal.
Is the passenger's seat airbag
indicator lit?
Go to step 3.Go to step 4.
3CHECK AIRBAG MAIN HARNESS.
1) Turn the ignition switch to OFF.
2) Remove the passenger’s side warning box
and disconnect the connector (i116).
3) Connect the connector (1U) in the test har-
ness U to connector (AB6).
4) Measure the resistance between connec-
tors (2U) and (4U) in the test harness U and
chassis ground.
Connector & terminal
(2U) No. 14 — (4U) No. 17:
(2U) No. 14 — Chassis ground:
(4U) No. 17 — Chassis ground:
Is the resistance more than 1
MΩ?
Replace the pas-
senger’s side
warning box.
REMOVAL, Air
Ve n t G r i l l e . >
Repair the bulk-
head harness. Or
replace the airbag
main harness with
body harness.
4CHECK THE AIRBAG HARNESS.
1) Connect the connectors (7U) and (8U) in
the test harness U.
2) Connect the battery ground terminal and
turn the ignition switch to ON.
Is the passenger's seat airbag
indicator lit?
Replace the airbag
control module.
Module.>
Go to step 5.
5CHECK THE AIRBAG HARNESS.
1) Turn the ignition switch to OFF.
2) Connect the connector (1U) in the test har-
ness U to connector (AB6).
3) Measure the resistance between connec-
tors (2U) and (4U) in the test harness U and
the connector (i116).
Connector & terminal
(2U) No. 14 — (i116) No. 5:
(4U) No. 17 — (i116) No. 6:
Is the resistance less than 10
Ω?
Go to step 6.Repair the bulk-
head harness. Or
replace the airbag
main harness with
body harness.
6CHECK BODY HARNESS.
1) Turn the ignition switch to ON.
2) Measure the voltage between connector
(i116) and chassis ground.
Connector & terminal
(i116) No. 3 — Chassis ground:
Is the voltage more than 10 V? Replace the pas-
senger’s side
warning box.
REMOVAL, Air
Ve n t G r i l l e . >
Repair the power
supply line to the
passenger’s side
warning box.
COM-2
General Description
COMMUNICATION SYSTEM
1. General Description
A: CAUTION
•Before disassembling or reassembling parts, al-
ways disconnect the battery ground cable from bat-
tery. When replacing the audio, control module and
other parts provided with memory functions, record
the memory contents before disconnecting the bat-
tery ground cable. Otherwise, the memory is
cleared.
•Reassemble the parts in the reverse order of dis-
assembly procedure unless otherwise indicated.
•Adjust parts to the given specifications.
•Connect the connectors securely during reas-
sembly.
•After reassembly, make sure functional parts op-
erate smoothly.
B: PREPARATION TOOL
1. GENERAL TOOL
TOOL NAME REMARKS
Circuit Tester Used for measuring resistance and
voltage.
TO RX® BIT T30Used for removing/installing driver’s
airbag module.