battery SUBARU TRIBECA 2009 1.G Service User Guide

AB(diag)-4
General Description
AIRBAG SYSTEM (DIAGNOSTICS)
3. General Description
A: CAUTION
•When servicing a vehicle, be sure to turn the ig-
nition switch to OFF, disconnect the ground cable
from battery, and wait for more than 20 seconds
before starting work.
•The airbag system is fitted with a backup power
source. After disconnecting the battery ground ca-
ble, the airbag may deploy if you do not wait for
more than 20 seconds before starting the service of
airbag system.
•If sensors, airbag module, airbag control module,
pretensioner or harness is deformed or damaged,
replace with new part.
•Do not use the airbag system and pretensioners
on other vehicles. When replacing parts, be sure to
replace them with new ones.
•When checking the airbag system, be sure to
use a digital circuit tester. Use of an analog circuit
tester may cause the airbag to activate erroneously
due to a minimal current inside tester.
•When checking, use a test harness (1). Damage
to connector terminal causes malfunction. Do not
directly put the tester probe on airbag connector
terminal.
•Do not drop the airbag system parts, or keep
them at high temperature over 93°C (199°F), or let
water, oil or grease get on them; the internal parts
may be damaged and reliability greatly lowered.
IN-00203
AB-00120
AB-00121
AB-00122
(1)
AB-00123

AB(diag)-8
General Description
AIRBAG SYSTEM (DIAGNOSTICS)
B: INSPECTION
Measure the battery voltage and check electrolyte.
Standard voltage: 12 V
Specific gravity: Above 1.260
C: PREPARATION TOOL
CAUTION:
To measure the voltage and resistance of airbag system component, be sure to use the specified test
harness.
1. SPECIAL TOOL
ILLUSTRATION TOOL NUMBER DESCRIPTION REMARKS
18482AA010 CARTRIDGE Troubleshooting for the electrical system.
22771AA030 SUBARU SELECT
MONITOR KIT
Tr o u b l e s h o o t i n g f o r t h e e l e c t r i c a l s y s t e m .
ST18482AA010
ST22771AA030

AB(diag)-29
Airbag Control Module I/O Signal
AIRBAG SYSTEM (DIAGNOSTICS)
6. Airbag Control Module I/O Signal
A: ELECTRICAL SPECIFICATION
•Terminal numbers in airbag control module connector are shown in the figure.
•Airbag warning light illuminates when the connector is removed from airbag control module.
Item Control module terminal No.
Line end check connector(1)-2
Diagnosis connector(1)-19
Data link connector(1)-12
Combination meter(1)-3
Battery power supply Common use fuse (1)-6
Dedicated fuse (1)-5
Passenger’s airbag module level one + (1)-10
–(1)-11
Passenger’s airbag module level two + (1)-8
–(1)-7
Driver’s airbag module level one + (1)-14
–(1)-13
Driver’s airbag module level two + (1)-16
–(1)-17
Fr o nt su b se ns or L H Powe r su p pl y a n d co mmu-
nication(1)-15
GND (1)-26
Fr o nt su b se ns or RH Powe r su p pl y a n d co mmu-
nication(1)-9
GND (1)-20
Ground line (GND)(1)-27
(1)-28
Passenger’s airbag OFF indicator (1)-1
Passenger’s airbag ON indicator (1)-18
Passenger’s seat belt war ning light (integrated module) (1)-24
Seat belt buckle switch LH + (2)-19
–(2)-2
Seat position sensor LH + (2)-3
–(2)-4
AB-00937
123456789101112
1314151617181920
123456789101112
1314151617181920
1234567891011121314151617
1819202122232425262728
(1)(2) (3)

AB(diag)-33
Subaru Select Monitor
AIRBAG SYSTEM (DIAGNOSTICS)
B: INSPECTION
1. COMMUNICATION FOR INITIALIZING IMPOSSIBLE
DETECTING CONDITION:
Defective harness connector
TROUBLE SYMPTOM:
Communication is impossible between the airbag control module and the Subaru Select Monitor.
WIRING DIAGRAM:
AB-01299
AB1B40
12345678
910 11 12 13 14 15 16
MAIN SBF
SBF-6
NO.12NO.25
B40
AB6
B31
AB1
E
EE
1
10
12
7
282765
NO.13
IGNITIONSWITCH
AIRBAG CONTROL MODULE
BATTERY
DATA LINK CONNECTOR
123456789101112
AB6
1234567891011121314161715
1819202122232425262728
910

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.
Airbag Control
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)-35
Subaru Select Monitor
AIRBAG SYSTEM (DIAGNOSTICS)
2. WITHOUT DTC
DETECTING CONDITION:
•Defective combination meter
•Open circuit of harness
TROUBLE SYMPTOM:
•Airbag warning light remains on.
•“NO TROUBLE CODE” will be displayed on the Subaru Select Monitor.
For detailed operation procedure, refer to “Airbag Warning Light Failure”. ing Light Failure.>
NOTE:
•For detailed operation procedure, refer to “Airbag Warning Light Failure”. Warning Light Failure.>
•When the airbag warning light is OFF and “NO TROUBLE CODE” is displayed on Subaru Select Monitor,
the system is in normal condition.
9CHECK THE HARNESS BETWEEN THE AIR-
BAG CONTROL MODULE AND DATA LINK
CONNECTOR.
1) Turn the ignition switch to OFF, disconnect
the battery ground cable, and wait more than
20 seconds.
2) Disconnect the connector (AB6) from air-
bag control module.
3) Connect the connector (1U) in the test har-
ness U to connector (AB6).
4) Measure the resistance between connector
(4U) in the test harness U and the data link
connector.
Connector & terminal
(4U) No. 18 — (B40) No. 10:
Is the resistance less than 10
Ω?
Go to step 10.Repair the har-
ness between the
airbag control
module and the
data link connec-
tor. Or replace the
airbag main har-
ness with the bulk-
head harness.
10 CHECK POWER SUPPLY CIRCUIT.
1) Turn the ignition switch to ON.
2) Measure the voltage between connector
(2U) in the test harness U and chassis ground.
Connector & terminal
(2U) No. 1 — Chassis ground:
(2U) No. 6 — Chassis ground:
Is the voltage more than 10 V? Go to step 11.Repair the har-
ness between the
airbag control
module and the
battery. Or replace
the airbag main
harness with the
bulkhead harness.
11 CHECK BETWEEN THE AIRBAG CONTROL
MODULE AND CHASSIS GROUND.
1) Turn the ignition switch to OFF.
2) Measure the resistance between connector
(2U) in the test harness U and chassis ground.
Connector & terminal
(2U) No. 10 — Chassis ground:
(2U) No. 11 — Chassis ground:
Is the resistance less than 10
Ω?
Go to step 12.Repair the har-
ness between the
airbag control
module and the
chassis ground. Or
replace the airbag
main harness with
the bulkhead har-
ness.
12 CHECK POOR CONTACT OF CONNECTOR.Is there poor contact in the
control module power supply,
ground circuit and data link
connector?
Repair the con-
nector. (Replace
the harness with-
out repairing the
airbag system
connector.)
Replace the only
airbag control
module. AB-21, REMOVAL,
Airbag Control
Module.>
Step Check Yes No

AB(diag)-40
Airbag Warning Light Failure
AIRBAG SYSTEM (DIAGNOSTICS)
12.Airbag Warning Light Failure
A: AIRBAG WARNING LIGHT REMAINS ON
DETECTING CONDITION:
•Airbag warning light is faulty.
•Airbag control module to airbag warning light circuit is shorted or open.
•Grounding circuit is faulty.
•Airbag control module is faulty.
•Connection of (AB1) and (B31) is improper.
•Connection of (AB6) 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.
•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.
•When inspecting the airbag main harness, disconnect the airbag module connectors and seat belt
pretensioners of the driver’s and passenger’s seats for safety reasons.
WIRING DIAGRAM:
AB-01298
AB6
B31
AB1
No.5
3
B12
A3A4
11
AB6AB1i10
B403i2
i126i127
i10A:i11B:
B403
1
13
123456789
1611101514131217 191823 252420 2221
435689122827141110 133029262524232221201918172116157
1245614131211109873
i11
1245614715 1613121110983
i102
1234567891011121314151617
1819202122232425262728
IGNITIONSWITCH
COMBINATION METER
BATTERY
AIRBAG WARNING LIGHT
AIRBAG CONTROL MODULE
:TERMINAL NO. OPTIONAL ARRANGEMENT AMONG 7, 8 AND 9
:TERMINAL NO. OPTIONAL ARRANGEMENT AMONG 10, 11 AND 12
REVERSECIRCUIT
123456789101112
i126
i127
1256347891011 12
2*
2***
1*

AB(diag)-41
Airbag Warning Light Failure
AIRBAG SYSTEM (DIAGNOSTICS)
Step Check Yes No
1READ DTC.
Read the DTC. DIAGNOSTIC TROUBLE CODE (DTC),
OPERATION, Subaru Select Monitor.>
Is DTC displayed? Perform the diag-
nosis according to
DTC.
Go to step 2.
2CHECK POOR CONTACT.
1) Turn the ignition switch to OFF, disconnect
the battery ground cable, and wait more than
20 seconds.
2) Confirm that there is solid connection
between the airbag control module and con-
nector (AB6).
Is there poor contact in con-
nector (AB6)?
If the poor contact
of the connector is
not fixed, replace
the airbag main
harness with body
harness or replace
the airbag control
module. AB-21, Airbag
Control Module.>
Go to step 3.
3CHECK AIRBAG MAIN HARNESS.
1) Remove the instrument panel lower cover
and disconnect the connectors (AB7) and
(AB2).
2) Remove the console side cover lower on
the passenger's side and disconnect the con-
nectors (AB10) and (AB9).
3) Disconnect the connector (AB6) from air-
bag control module, and connect the connector
(1U) in the test harness U.
4) Connect the battery ground terminal and
turn the ignition switch to ON.
5) Connect the connectors (7U) and (8U) in
the test harness U.
NOTE:After the fault has been cleared, disconnect the
connectors (7U) and (8U).
Does the airbag warning light
go off?
Go to step 4.Go to step 5.
4CHECK GROUND CIRCUIT.
1) Turn the ignition switch to OFF, disconnect
the battery ground cable, and wait more than
20 seconds.
2) Disconnect the connector (AB6) from air-
bag control module.
3) Connect the connector (1U) in the test har-
ness U to body harness connector (AB6).
4) Measure the resistance between connector
(2U) in the test harness U and chassis ground.
Connector & terminal
(2U) No. 10 — Chassis ground:
(2U) No. 11 — Chassis ground:
Is the resistance less than 10
Ω?
Replace the airbag
control module.
Airbag Control
Module.>
Repair the chas-
sis ground circuit.
5CHECK AIRBAG MAIN HARNESS AND
BULKHEAD HARNESS.
1) Disconnect the connectors (7U) and (8U).
2) Remove the combination meter.
3) Measure the resistance between connector
(i11) and connector (2U) in the test harness U.
Connector & terminal
(2U) No. 7 — (i11) No. 12:
Is the resistance less than 10
Ω?
Check the combi-
nation meter.
Go to step 6.

AB(diag)-42
Airbag Warning Light Failure
AIRBAG SYSTEM (DIAGNOSTICS)
6CHECK POOR CONTACT OF CONNEC-
TORS (AB1) AND (B31).
1) Turn the ignition switch to OFF, disconnect
the battery ground terminal, and wait more
than 20 seconds.
2) Confirm that there is firm contact between
connectors (AB1) and (B31).
Is there poor contact between
connectors (AB1) and (B31)?
Repair the bulk-
head harness or
replace the airbag
main harness with
body harness.
Go to step 7.
7CHECK AIRBAG MAIN HARNESS.
Check the airbag main harness for defect.
Is there any defect in the air-
bag main harness?
Replace the airbag
main harness with
bulkhead harness.
Repair the bulk-
head harness.
Step Check Yes No

AB(diag)-43
Airbag Warning Light Failure
AIRBAG SYSTEM (DIAGNOSTICS)
B: AIRBAG WARNING LIGHT REMAINS OFF
DETECTING CONDITION:
•Fuse No. 5 (in fuse box) is brown out.
•Body harness circuit is open.
•Airbag warning light is faulty.
•Airbag main harness 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 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.
•When inspecting the airbag main harness, disconnect the airbag module connectors and seat belt
pretensioners of the driver’s and passenger’s seats for safety reasons.
WIRING DIAGRAM:
AB-01298
AB6
B31
AB1
No.5
3
B12
A3A4
11
AB6AB1i10
B403i2
i126i127
i10A:i11B:
B403
1
13
123456789
1611101514131217 191823 252420 2221
435689122827141110 133029262524232221201918172116157
1245614131211109873
i11
1245614715 1613121110983
i102
1234567891011121314151617
1819202122232425262728
IGNITIONSWITCH
COMBINATION METER
BATTERY
AIRBAG WARNING LIGHT
AIRBAG CONTROL MODULE
:TERMINAL NO. OPTIONAL ARRANGEMENT AMONG 7, 8 AND 9
:TERMINAL NO. OPTIONAL ARRANGEMENT AMONG 10, 11 AND 12
REVERSECIRCUIT
123456789101112
i126
i127
1256347891011 12
2*
2***
1*