2009 SUBARU TRIBECA ignition

LAN(diag)-39
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
LAN SYSTEM (DIAGNOSTICS)
Step Check Yes No
1CHECK FUSE.
1) Turn the ignition switch to OFF.
2) Remove the fuse (No. 8).
Is the fuse blown out? Replace the fuse
(No. 8). If the
replaced fuse has
blown out easily,
repair the short cir-
cuit of harness
between fuse (No.
8) and body inte-
grated unit.
Go to step 2.
2CONTINUITY CHECK OF WIRING HAR-
NESS.
1) Disconnect the connector (B280) from body
integrated unit.
2) Measure the voltage between body inte-
grated unit connector and chassis ground.
Connector & terminal
(B280) No. 7 (+) — Chassis ground (–):
Is the voltage more than 10 V? Go to step 3.Repair the har-
ness for open or
shorted circuit
between body inte-
grated unit and
fuse.
3CHECK POOR CONTACT OF CONNEC-
TORS.
Is there poor contact in body
integrated unit connector?
Repair the poor
contact of connec-
tor.
Go to step 4.
4CHECK BODY INTEGRATED UNIT HAR-
NESS.
1) Connect all the connectors.
2) Perform the clear memory mode.
3) Read DTC.
Is the same DTC displayed? Replace the body
integrated unit.
Body Integrated
Unit.>
Te m p o r a r y p o o r
contact occurs.

LAN(diag)-40
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
LAN SYSTEM (DIAGNOSTICS)
F: DTC B0103 IGNITION POWER FAILURE
DTC DETECTING CONDITION:
IGN power supply circuit is open or shorted.
TROUBLE SYMPTOM:
Symptoms such as illuminating the malfunction indicator light or high speed CAN error display “Er HC” may
occur.
WIRING DIAGRAM:
LAN00150
BODY INTEGRATED UNIT
A1A24
MICRO COMPUTER
B1A8
B72
IGNITION SWITCH
1B
2
4
ACC
ACCOFF
IG
ON
B52B:
34128910 1112 13 14 15 16 17 18 19 20 21 22 23 24567
B280B:
B281C:
567821943102422 2325111213141526 27281617181920 21
5467821931022 23111213141524 25 26 2716171828 29192021 30
i84A:
1234567891011121314151617181920212223242526272829303132333435
12345678910 11 12 19 2013 14 15 16 17 18
i5A:
ACC POWER SUPPLY
B52i5A:B:
E
MAIN SBF-11
FB-28 NO.31
BATTERY
IG POWER SUPPLY
i84
B280B:
A:
B281C:
A21C9B22C8
EE
FB-37 NO.12
B72
134562
FUSE &RELAY BOX
Step Check Yes No
1CHECK FUSE.
1) Turn the ignition switch to OFF.
2) Remove the fuse (No. 12).
Is the fuse blown out? Replace the fuse
(No. 12). If the
replaced fuse has
blown out easily,
repair the short cir-
cuit of harness
between fuse (No.
12) and body inte-
grated unit.
Go to step 2.

LAN(diag)-41
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
LAN SYSTEM (DIAGNOSTICS)
2CONTINUITY CHECK OF WIRING HAR-
NESS.
1) Disconnect the connector (i84) from body
integrated unit.
2) Turn the ignition switch to ON.
3) Measure the voltage between body inte-
grated unit connector and chassis ground.
Connector & terminal
(i84) No. 1 (+) — Chassis ground (–):
Is the voltage more than 10 V? Go to step 3.Repair the har-
ness for open or
shorted circuit
between body inte-
grated unit and
fuse.
3CHECK POOR CONTACT OF CONNECTOR.Is there poor contact in body
integrated unit connector?
Repair the poor
contact of connec-
tor.
Go to step 4.
4CHECK BODY INTEGRATED UNIT HAR-
NESS.
1) Connect all the connectors.
2) Perform the clear memory mode.
3) Read DTC.
Is the same DTC displayed? Replace the body
integrated unit.
Body Integrated
Unit.>
Te m p o r a r y p o o r
contact occurs.
Step Check Yes No

LAN(diag)-42
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
LAN SYSTEM (DIAGNOSTICS)
G: DTC B0104 ACC POWER FAILURE
DTC DETECTING CONDITION:
ACC power supply circuit is open or shorted.
TROUBLE SYMPTOM:
Rear wiper may not operate at ACC position.
WIRING DIAGRAM:
LAN00150
BODY INTEGRATED UNIT
A1A24
MICRO COMPUTER
B1A8
B72
IGNITION SWITCH
1B
2
4
ACC
ACCOFF
IG
ON
B52B:
34128910 1112 13 14 15 16 17 18 19 20 21 22 23 24567
B280B:
B281C:
567821943102422 2325111213141526 27281617181920 21
5467821931022 23111213141524 25 26 2716171828 29192021 30
i84A:
1234567891011121314151617181920212223242526272829303132333435
12345678910 11 12 19 2013 14 15 16 17 18
i5A:
ACC POWER SUPPLY
B52i5A:B:
E
MAIN SBF-11
FB-28 NO.31
BATTERY
IG POWER SUPPLY
i84
B280B:
A:
B281C:
A21C9B22C8
EE
FB-37 NO.12
B72
134562
FUSE &RELAY BOX
Step Check Yes No
1CHECK FUSE.
1) Turn the ignition switch to OFF.
2) Remove the fuse (No. 31).
Is the fuse blown out? Replace the fuse
(No. 31). If the
replaced fuse has
blown out easily,
repair the short cir-
cuit of harness
between fuse (No.
31) and body inte-
grated unit.
Go to step 2.

LAN(diag)-43
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
LAN SYSTEM (DIAGNOSTICS)
2CONTINUITY CHECK OF WIRING HAR-
NESS.
1) Disconnect the connector (i84) from body
integrated unit.
2) Turn the ignition switch to ON.
3) Measure the voltage between body inte-
grated unit connector and chassis ground.
Connector & terminal
(i84) No. 24 (+) — Chassis ground (–):
Is the voltage more than 10 V? Go to step 3.Repair the har-
ness for open or
shorted circuit
between body inte-
grated unit and
fuse.
3CHECK POOR CONTACT OF CONNECTOR.Is there poor contact in body
integrated unit connector?
Repair the poor
contact of connec-
tor.
Go to step 4.
4CHECK BODY INTEGRATED UNIT HAR-
NESS.
1) Connect all the connectors.
2) Perform the clear memory mode.
3) Read DTC.
Is DTC displayed? Replace the body
integrated unit.
Body Integrated
Unit.>
Te m p o r a r y p o o r
contact occurs.
Step Check Yes No

LAN(diag)-48
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
LAN SYSTEM (DIAGNOSTICS)
12 CHECK HARNESS.
1) Connect the control module connectors
except body integrated unit.
2) Connect the tester to vehicle side harness.
3) Turn the ignition switch to ON, and mea-
sure the terminal voltage.
Connector & terminal
(B280) No. 20 — Chassis ground:
Is the voltage more than 6 V? Go to step 13. Go to step 14.
13 CHECK CONTROL MODULE.
Disconnect each control module connector
one by one with the tester connected to vehicle
side harness.
Is there any module which its
voltage changes to less than 6
V?
Replace the mod-
ule which its volt-
age changes.
Repair or replace
the shor t circuit of
the harness.
14 CHECK HARNESS.
1) Connect the control module connectors
except body integrated unit connector.
2) Connect the tester between vehicle side
harness and chassis ground, and measure the
resistance.
Connector & terminal
(B280) No. 20 — Chassis ground:
(B280) No. 30 — Chassis ground:
Is the resistance less than 10
Ω?
Go to step 15.Repair or replace
the shor t circuit of
the harness.
15 CHECK CONTROL MODULE.
Disconnect each control module connector
one by one with the tester connected to vehicle
side harness.
Is there any module which its
resistance changes to more
than 10 Ω?
Replace the mod-
ule which its resis-
tance changes to
more than 10 Ω.
Repair or replace
the shor t circuit of
the harness.
16 CHECK CONTROL MODULE.
1) Connect all the control module connectors.
2) Connect the Subaru Select Monitor and
perform the clear memory.
3) Disconnect the TCM connector (B54).
4) Turn the ignition switch to ON and read the
DTC of body integrated unit. LAN(diag)-12, OPERATION, Subaru Select
Monitor.>
Is DTC B0201 displayed? Go to step 17.Replace the TCM.
REMOVAL, Trans-
mission Control
Module (TCM).>
17 CHECK CONTROL MODULE.
1) Connect the TCM control module connec-
tor.
2) Using the Subaru Select Monitor, perform
the clear memory.
3) Disconnect the steering angle sensor con-
nector (B231).
4) Turn the ignition switch to ON and read the
DTC of body integrated unit. LAN(diag)-12, OPERATION, Subaru Select
Monitor.>
Is DTC B0201 displayed? Go to step 18.Replace the steer-
ing angle sensor.
REPLACEMENT,
Steering Angle
Sensor.>
18 CHECK CONTROL MODULE.
1) Connect the steering angle sensor connec-
tor.
2) Using the Subaru Select Monitor, perform
the clear memory.
3) Disconnect the yaw rate sensor connector
(B359).
4) Turn the ignition switch to ON and read the
DTC of body integrated unit. LAN(diag)-12, OPERATION, Subaru Select
Monitor.>
Is DTC B0201 displayed? Go to step 19.Replace the yaw
rate sensor. to VDC-18,
REMOVAL, Yaw
Rate & Lateral G
Sensor.>
Step Check Yes No

LAN(diag)-58
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
LAN SYSTEM (DIAGNOSTICS)
6CHECK HARNESS.
1) Disconnect the body integrated unit (B280),
ECM (B136), TCM (B54), VDC CU (B310) and
Ya w r a t e s e n s o r ( B 3 5 9 ) c o n n e c t o r s .
2) Measure the voltage between harness con-
nector and chassis ground while turning the
ignition switch to ON.
Connector & terminal
(B280) No. 20 (+) — Chassis ground (–):
(B280) No. 30 (+) — Chassis ground (–):
Is the voltage more than 6 V? Repair or replace
the short circuit of
the harness.
Read the DTC of
ECM. Perform the
diagnosis accord-
ing to DTC. to
EN(H6DO)(diag)-
26, READ DIAG-
NOSTIC TROU-
BLE CODE (DTC)
FOR ENGINE
(NORMAL
MODE), OPERA-
TION, Subaru
Select Monitor.>
Step Check Yes No

LAN(diag)-62
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
LAN SYSTEM (DIAGNOSTICS)
Step Check Yes No
1CHECK HARNESS.
1) Disconnect the harness connector of body
integrated unit.
2) Measure the resistance between harness
connector terminals.
Connector & terminal
(B280) No. 20 — No. 30:
Is the resistance between 55
— 65 Ω?
Read the DTC of
VDC CM, and per-
for m the diagnosis
according to DTC.
Go to step 2.
2CHECK HARNESS.
1) Disconnect the harness connector of body
integrated unit.
2) Measure the resistance between harness
connector terminals.
Connector & terminal
(B280) No. 20 — No. 30:
Is the resistance between 115
— 125 Ω?
Go to step 5.Go to step 3.
3CHECK HARNESS.
1) Disconnect the harness connector of body
integrated unit.
2) Measure the resistance between harness
connector terminal and chassis ground.
Connector & terminal
(B280) No. 20 — Chassis ground:
(B280) No. 30 — Chassis ground:
Is the resistance ∞ Ω?Open circuit in
related line of body
integrated unit.
Repair the open
circuit of harness
or replace har-
ness.
Go to step 4.
4CHECK HARNESS.
1) Disconnect the harness connector of body
integrated unit.
2) Measure the voltage between harness con-
nector terminal and chassis ground. (Ignition
switch ON)
Connector & terminal
(B280) No. 20 (+) — Chassis ground (–):
(B280) No. 30 (+) — Chassis ground (–):
Is the voltage more than 6 V? Repair the short
circuit of harness
or replace har-
ness.
Go to step 5.
5CHECK END RESISTANCE.
1) Disconnect the VDC CM harness connec-
tor.
2) Measure the resistance between VDC CM
connector terminals.
Connector & terminal
(B310) No. 20 — No. 34:
Is the resistance between 115
— 125 Ω?
Go to step 6.End resistance is
open. Replace the
VDC CM. VDC-7, VDC Con-
trol Module &
Hydraulic Control
Unit (VDCCM&H/
U).>
6CHECK HARNESS.
1) Disconnect the body integrated unit con-
nector (B280) and VDC CM connector (B310).
2) Measure the resistance between harness
connector terminals.
Connector & terminal
(B310) No. 13 — (B280) No. 20:
(B310) No. 29 — (B280) No. 30:
Is the resistance less than 10
Ω?
Go to step 7.Main wiring har-
ness is open.
Repair the open
circuit of harness
or replace har-
ness.
7CHECK VDC CM.
1) Connect all the connectors.
2) Read the DTC of VDC CM using Subaru
Select Monitor.
Is DTC other than “CAN com-
munication” displayed?
Pe r for m t h e d ia g -
nosis according to
DTC concerning
VDC CM.
Replace the VDC
CM. 7, VDC Control
Module & Hydrau-
lic Control Unit
(VDCCM&H/U).>