Subaru Legacy IV (2008 year). Service manual — part 717
4AT(diag)-89
Diagnostic Procedure without Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
16
CHECK SPORT/MANUAL MODE SWITCH.
1) Shift and hold the AT select lever to down
side.
2) Measure the resistance between SPORT/
manual mode switch terminals.
Connector & terminal
(B116) No. 10 — No. 11:
Is the resistance less than 1
:? Go to step 17.
Replace the guide
plate assembly.
17
CHECK HARNESS CONNECTOR BETWEEN
BODY INTEGRATED UNIT AND SPORT/
MANUAL MODE SWITCH.
1) Disconnect the connector from body inte-
grated unit.
2) Measure the resistance of harness between
body integrated unit connector and SPORT/
manual mode switch connector.
Connector & terminal
(B116) No. 11 — (B281) No. 25:
Is the resistance less than 1
:? Go to step 18.
Repair the open
circuit of harness
between the
SPORT/manual
mode switch con-
nector and body
integrated unit con-
nector, or poor
contact of connec-
tor.
18
CHECK HARNESS CONNECTOR BETWEEN
BODY INTEGRATED UNIT AND SPORT/
MANUAL MODE SWITCH.
Measure the resistance of harness between
SPORT/manual mode switch connector and
chassis ground.
Connector & terminal
(B116) No. 11 — Chassis ground:
Is the resistance 1 M
: or
more?
Go to step 19.
Repair the short
circuit of harness
between SPORT/
manual mode
switch connector
and body inte-
grated unit connec-
tor.
19
CHECK INPUT SIGNAL TO BODY INTE-
GRATED UNIT.
1) Connect all connectors.
2) Turn the ignition switch to ON (engine OFF).
3) Check the signal voltage for body integrated
unit.
Connector & terminal
(B281) No. 25 (+) — Chassis ground (–):
Is the voltage 1.5 — 8 V?
Go to step 20.
Go to step 21.
20
CHECK INPUT SIGNAL TO BODY INTE-
GRATED UNIT.
1) Shift and hold the AT select lever to down
side.
2) Check the signal voltage for body integrated
unit.
Connector & terminal
(B281) No. 25 (+) — Chassis ground (–):
Is the voltage less than 1 V?
Go to step 21.
Replace the body
integrated unit.
<Ref. to 4AT-61,
Transmission Con-
trol Module
(TCM).>
21
CHECK POOR CONTACT.
Is there poor contact in the
SPORT/manual mode switch
circuit?
Repair the poor
contact.
Temporary poor
contact of the
SPORT/manual
mode switch circuit
connector or har-
ness.
Step
Check
Yes
No
4AT(diag)-90
Diagnostic Procedure without Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
C: CHECK SPORT SHIFT INDICATOR
DIAGNOSIS:
Output signal circuit of SPORT shift indicator is open or shorted.
TROUBLE SYMPTOM:
• SPORT shift indicator does not display or remains displayed.
• SPORT shift indicator display does not change.
WIRING DIAGRAM:
AT-04900
MAIN SBF
SBF-6
No.
5
E
18
17
B54
TCM
3
21
22
i10
i84
A:
B280
B:
A26
A27
B20
B30
B365
1
*
2
*
1
*
2
*
WN
WN
ON
i107
i106
*
*
*
*
ON
WN
WN
ON
ON
B54
5
6
7 8
2
1
9
4
3
10
24
22 23
25
11 12 13 14 15
26 27
28
16
17 18 19 20 21
33 34
29
32
30
31
35
i10
i84
B280
2
1
3 4
6 7 8 9 10
22
21
20
19
18
17
16
15
14
13
12
11
5
8
7
6
5
4
3
2
1
22 23
21
20
19
16
15
14
13
12
11
10
9
34 35
33
32
17
30
18
31
29
28
27
26
25
24
8
7
6
5
4
3
2
1
22
23
21
20
19
16
15
14
13
12
11
10
9
17
30
18
29
28
27
26
25
24
A:
B:
i107
i106
1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18 19 20
1 2 3 4
B365
LCD (SPORT SHIFT)
CAN
JOINT
CONNECTOR
COMBINATION
METER
IGNITION
SWITCH
CAN TRANSCEIVER & RECEIVER
MICRO COMPUTER
B
A
TTER
Y
BODY INTEGRATED UNIT
:
:
1
*
2
*
:
*
:
WN
:
ON
WITH NAVIGATION
WITHOUT NAVIGATION
TERMINAL No. OPTIONAL ARRANGEMENT
AMONG 1, 2, 3, 11, 12 AND 13
TERMINAL No. OPTIONAL ARRANGEMENT
TERMINAL No. OPTIONAL ARRANGEMENT
AMONG 8, 9, 10, 18, 19 AND 20
CAN
JOINT
CONNECTOR
CAN
JOINT
CONNECTOR
4AT(diag)-91
Diagnostic Procedure without Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
Check
Yes
No
1
CHECK BODY INTEGRATED UNIT.
Check DTC of body integrated unit.
Is DTC of CAN communication
displayed?
Perform the diag-
nosis according to
DTC.
Go to step 2.
2
CHECK TCM.
1) Turn the ignition switch to OFF.
2) Connect the Subaru Select Monitor to data
link connector.
3) Turn the ignition switch to ON. (engine OFF)
4) Run the Subaru Select Monitor.
5) Shift the AT select lever to SPORT mode.
6) Shift up the AT select lever.
7) Read the “Gear Position” data of TCM using
Subaru Select Monitor.
Is the gear position 2?
Go to step 3.
Replace the TCM.
<Ref. to 4AT-61,
Transmission Con-
trol Module
(TCM).>
3
CHECK TCM.
1) Shift down the AT select lever.
2) Read the “Gear Position” data of TCM using
Subaru Select Monitor.
Is the gear position 1?
Go to step 4.
Replace the TCM.
<Ref. to 4AT-61,
Transmission Con-
trol Module
(TCM).>
4
CHECK BODY INTEGRATED UNIT.
Read the data of SPORT shift gear position
using Subaru Select Monitor.
Is the SPORT shift gear posi-
tion 2?
Go to step 5.
Check the body
integrated unit.
5
CHECK COMBINATION METER.
<Ref. to IDI-5, INSPECTION, Combination
Meter System.>
Is the SPORT shift indicator
OK?
Check the buzzer.
<Ref. to 4AT(diag)-
92, CHECK
BUZZER, Diag-
nostic Procedure
without Diagnostic
Trouble Code
(DTC).>
Replace the com-
bination meter
assembly. <Ref. to
IDI-22, Combina-
tion Meter.>
4AT(diag)-92
Diagnostic Procedure without Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
D: CHECK BUZZER
DIAGNOSIS:
Output signal circuit of buzzer is open or shorted.
TROUBLE SYMPTOM:
Buzzer remains beeping.
WIRING DIAGRAM:
AT-04901
MAIN SBF
SBF-6
No.
5
E
18
17
B54
TCM
3
21
22
i10
i84
A:
B280
B:
A26
A27
B20
B30
B365
1
*
2
*
1
*
2
*
WN
WN
ON
i107
i106
*
*
*
*
ON
WN
WN
ON
ON
B54
5
6
7 8
2
1
9
4
3
10
24
22 23
25
11 12 13 14 15
26 27
28
16
17 18 19 20 21
33 34
29
32
30
31
35
i10
i84
B280
2
1
3 4
6 7 8 9 10
22
21
20
19
18
17
16
15
14
13
12
11
5
8
7
6
5
4
3
2
1
22 23
21
20
19
16
15
14
13
12
11
10
9
34 35
33
32
17
30
18
31
29
28
27
26
25
24
8
7
6
5
4
3
2
1
22
23
21
20
19
16
15
14
13
12
11
10
9
17
30
18
29
28
27
26
25
24
A:
B:
i107
i106
1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18 19 20
1 2 3 4
B365
BUZZER
(SPORT SHIFT)
:
:
1
*
2
*
:
*
:
WN
:
ON
WITH NAVIGATION
WITHOUT NAVIGATION
TERMINAL No. OPTIONAL ARRANGEMENT
AMONG 1, 2, 3, 11, 12 AND 13
TERMINAL No. OPTIONAL ARRANGEMENT
TERMINAL No. OPTIONAL ARRANGEMENT
AMONG 8, 9, 10, 18, 19 AND 20
CAN
JOINT
CONNECTOR
CAN
JOINT
CONNECTOR
CAN
JOINT
CONNECTOR
BODY INTEGRATED UNIT
B
A
TTER
Y
IGNITION
SWITCH
COMBINATION
METER
CAN TRANSCEIVER & RECEIVER
MICRO COMPUTER
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