Subaru Legacy IV (2008 year). Manual — part 1178
LAN(diag)-46
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
LAN SYSTEM (DIAGNOSTICS)
Step
Check
Yes
No
1
CHECK HARNESS.
1) Disconnect the body integrated unit connec-
tor (B280).
2) Measure the resistance between body inte-
grated unit connector and chassis ground.
Connector & terminal
(B280) No. 6 — Chassis ground:
Is the resistance between 20 —
30
:?
Go to step 5.
Go to step 2.
2
CHECK HARNESS.
1) Disconnect the body integrated unit connec-
tor (B280).
2) Disconnect the shift lock solenoid connec-
tor.
3) Measure the resistance between body inte-
grated unit connector and shift lock solenoid
connector.
Connector & terminal
(B280) No. 6 — (B116) No. 3:
Is the resistance less than 10
:? Go to step 3.
Repair or replace
the open or short
circuit of harness.
3
CHECK SHIFT LOCK SOLENOID.
1) Disconnect the shift lock solenoid connec-
tor.
2) Measure the internal resistance of shift lock
solenoid.
Connector & terminal
(B116) No. 3 — No. 4:
Is the resistance between 20 —
30
:?
Go to step 4.
Replace the shift
lock solenoid.
4
CHECK GROUND CIRCUIT.
1) Disconnect the shift lock solenoid connec-
tor.
2) Measure the resistance between the shift
lock solenoid connector and chassis ground.
Connector & terminal
(B116) No. 4 — Chassis ground:
Is the resistance less than 10
:? Temporary poor
contact occurs.
Check the connec-
tion of each termi-
nal and repair
when necessary.
Replace the body
integrated unit.
<Ref. to SL-56,
Body Integrated
Unit.>
5
CHECK HARNESS.
1) Disconnect the body integrated unit connec-
tor (B280) and shift lock solenoid connector
(B116).
2) Measure the resistance between body inte-
grated unit connector (B280) and chassis
ground.
Connector & terminal
(B280) No. 6 — Chassis ground:
Is the resistance 1 M
: or
more?
Replace the body
integrated unit.
<Ref. to SL-56,
Body Integrated
Unit.>
Repair the short
circuit of harness
or replace har-
ness.
LAN(diag)-47
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
LAN SYSTEM (DIAGNOSTICS)
H: DTC U1201 CAN-HS COUNTER ABNORMAL
DTC DETECTING CONDITION:
High speed CAN communication of body integrated unit which monitor the error data and non-received data
are faulty.
TROUBLE SYMPTOM:
• “Er HC” is displayed in odo/trip meter. (Except for meter with MID)
• Malfunction indicator light illuminates.
WIRING DIAGRAM:
LAN00382
B40
1 2 3 4 5 6 7 8
9 10 11 12 13 14 15 16
B280
B:
5
4
6 7
8
2
1
9
3
10
22
23
11 12 13 14 15
24 25
26 27
16 17 18
28 29
19 20
21
30
B231
1 2 3 4
A: B54
16
10 11 12 13 14 15
25
24
30
9
8
7
17 18 19 20
28
21 22 23
29
32
31
1
2
3
4
5
6
27
26
33 34 35
B310
4 5 6 7 8 9
26 27 28 29 30
2 3
1
31 32 33 34 35 36
10 11
14 15 16 17 18 19
37 38 39 40
12 13
41 42 43 44 45 46
20 21
23
24
22
25
B230
1
2
3
4
B170
3 4
5 6
1 2
7 8
1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18 19 20
B365
B301
4 5 6 7 8 9
16 17 18 19 20
2 3
1
21 22 23 24 25 26
10 11
13
14
12
15
C: B136
B:
B55
5
6
7
2
1
3
4
29
10 11 12 13 14 15
25
24
16
30
9
8
17 18 19
20
28
21 22 23
32
31
26 27
33
34 35
2
3
B230
YAW RATE
SENSOR
B231
2
1
STEERING
ANGLE
SENSOR
VDCCM & H/U
B310
35
10
ECM
B136
27
35
B30
B20
BODY
INTEGRATED UNIT
B280
B:
6
14
B170
B365
B40
CAN JOINT
CONNEC-
TOR
CAN JOINT
CONNECTOR
DATA LINK
CONNECTOR
2
*
1
*
2
*
1
*
3
*
4
*
2
*
1
*
2
*
1
*
2
*
1
*
2
*
1
*
3
*
4
*
3
*
4
*
VDC
VDC
VDC
VDC
ABS
ABS
ABS
ABS
ABSCM & H/U
B301
26
11
VDC
ABS
ABS
TCM
B54
A:
4AT MODEL
5AT MODEL
B21
B20
A18
A17
B55
B:
VDC
*
1
*
2
*
3
*
4
: WITHOUT VDC
ABS
VDC
: TERMINAL No. OPTIONAL ARRANGEMENT
AMONG 1, 2, 3, 11, 12 AND 13
: TERMINAL No. OPTIONAL ARRANGEMENT
AMONG 8, 9, 10, 18, 19 AND 20
: TERMINAL No. OPTIONAL ARRANGEMENT
AMONG 1, 2, 5 AND 6
: TERMINAL No. OPTIONAL ARRANGEMENT
AMONG 3, 4, 7 AND 8
: WITH VDC
LAN(diag)-48
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
LAN SYSTEM (DIAGNOSTICS)
Step
Check
Yes
No
1
CHECK DTC.
Connect the Subaru Select Monitor and read all
DTCs.
Is there any DTC other than for
the body integrated unit?
Perform the diag-
nosis according to
the DTC of other
control modules.
Go to step 2.
2
CHECK DTC.
Check the DTC displayed in the body integrated
unit.
Is the DTC displayed a current
malfunction?
Check the connec-
tion of harness
connectors. Go to
step 3.
Go to step 4.
3
CHECK DTC.
Turn the ignition switch to OFF and read DTCs
again.
Is the DTC displayed a current
malfunction?
Go to step 5.
Go to step 4.
4
CHECK CURRENT DATA.
Using the Subaru Select Monitor, display
engine speed and vehicle speed signal from
ECM, TCM, VDC/ABS and body integrated unit
under the same conditions and compare data.
Do all data values match?
Temporary poor
contact occurs.
Perform the Clear
Memory operation.
Go to step 5.
5
CHECK HARNESS.
1) Disconnect the body integrated unit connec-
tor (B280).
2) Connect the tester to vehicle side connec-
tor, and measure the resistance.
Connector & terminal
(B280) No. 20 — No. 30:
Is the resistance between 55 —
65
:?
Go to step 6.
Go to step 9.
6
CHECK HARNESS.
1) Disconnect the TCM connector (B54).
2) Connect the tester to vehicle side connec-
tor, and measure the resistance.
Connector & terminal
5AT model:
(B54) No. 20 — No. 21:
4AT model:
(B54) No. 17 — No. 18:
Is the resistance between 55 —
65
:?
Go to step 7.
Go to step 9.
7
CHECK HARNESS.
NOTE:
For ABS model, Go to step 12.
1) Disconnect the yaw rate sensor connector
(B230).
2) Connect the tester to vehicle side connec-
tor, and measure the resistance.
Connector & terminal
(B230) No. 2 — No. 3:
Is the resistance between 55 —
65
:?
Go to step 8.
Go to step 9.
8
CHECK HARNESS.
1) Disconnect the steering angle sensor con-
nector (B231).
2) Connect the tester to vehicle side connec-
tor, and measure the resistance.
Connector & terminal
(B231) No. 1 — No. 2:
Is the resistance between 55 —
65
:?
Go to step 12.
Go to step 9.
9
CHECK HARNESS.
Is the measured resistance
115 — 125
: when connecting
the tester to vehicle side con-
nector?
Go to step 12.
Go to step 10.
10
CHECK HARNESS.
Is the measured resistance less
than 10
: when connecting the
tester to vehicle side connec-
tor?
Repair or replace
the short circuit of
measured related
harness.
Go to step 11.
LAN(diag)-49
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
LAN SYSTEM (DIAGNOSTICS)
11
CHECK HARNESS.
Is the measured resistance
30 M
: or more when connect-
ing the tester to vehicle side
connector?
Repair or replace
the open circuit of
measured related
harness.
Go to step 12.
12
CHECK HARNESS.
1) Disconnect the VDC/ABS CM connector.
2) Connect the tester to vehicle side harness,
and measure the resistance.
Connector & terminal
Model with VDC:
(B310) No. 10 — No. 35:
Model without VDC:
(B301) No. 11 — No. 26:
Is the resistance between 115 —
125
:?
Go to step 13.
Go to step 14.
13
CHECK CONTROL MODULE.
1) Connect the VDC/ABS CM connector.
2) Disconnect the connector from ECM.
3) Connect the tester to vehicle side harness,
and measure the resistance between terminals.
Connector & terminal
(B136) No. 27 — No. 35:
Is the resistance between 115 —
125
:?
Go to step 16.
Replace the VDC/
ABS CM. <Ref. to
VDC-7, VDC Con-
trol Module and
Hydraulic Control
Unit (VDCCM&H/
U).>
14
CHECK HARNESS.
1) Connect the VDC/ABS CM connector.
2) Disconnect the connector from ECM.
3) Connect the tester to vehicle side harness,
and measure the resistance between terminals.
Connector & terminal
(B136) No. 27 — No. 35:
Is the resistance between 115 —
125
:?
Go to step 15.
Repair or replace
the open circuit of
main wiring har-
ness.
15
CHECK CONTROL MODULE.
Connect the tester to ECM terminal, and mea-
sure the resistance.
Connector & terminal
(B136) No. 27 — No. 35:
Is the resistance between 115 —
125
:?
Go to step 16.
Replace the ECM.
<Ref. to
FU(H6DO)-38,
Engine Control
Module (ECM).>
16
CHECK CONTROL MODULE.
1) Connect all the control module connectors.
2) Connect the Subaru Select Monitor and per-
form the clear memory.
3) Disconnect the TCM connector (B54 or
B55).
4) Turn the ignition switch to ON and read the
DTC of body integrated unit. <Ref. to
LAN(diag)-12, READ DIAGNOSTIC TROUBLE
CODE (DTC), OPERATION, Subaru Select
Monitor.>
Is DTC U1201 displayed?
Go to step 17.
Check the TCM.
<Ref. to 5AT(diag)-
18, READ DIAG-
NOSTIC TROU-
BLE CODE (DTC),
OPERATION, Sub-
aru Select Moni-
tor.>
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 the body integrated unit. <Ref. to
LAN(diag)-12, READ DIAGNOSTIC TROUBLE
CODE (DTC), OPERATION, Subaru Select
Monitor.>
Is DTC U1201 displayed?
Go to step 18.
Check the steering
angle sensor.
<Ref. to
VDC(diag)-14,
HOW TO USE
SUBARU SELECT
MONITOR, OPER-
ATION, Subaru
Select Monitor.>
Step
Check
Yes
No
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