Subaru Legacy III (2000-2003 year). Service manual — part 605
AT-154
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC)
34
CHECK harness connector between TCM
and Steering roll connector.
1) Disconnect connector from TCM.
2) Measure harness resistance between TCM
connector and steering roll connector.
Connector & terminal
(B55) No. 1 — (B68) No. 3:
Is the measured value less than the speci-
fied value?
1
Ω
The circuit is
returned to a nor-
mal condition.
Temporary poor
contact of the har-
ness may be the
case. Repair poor
contact of steering
roll connector and
steering shift
switch harness or
connector.
Repair poor con-
tact or harness
disconnection
between connec-
tors of TCM con-
nector and
steering roll con-
nector
35
CHECK POOR CONTACT.
Is there poor contact in SPORT shift switch cir-
cuit?
There is poor contact.
Repair poor con-
tact.
Intermittent poor
contact in SPORT
shift switch circuit
connector or har-
ness
Step
Value
Yes
No
AT-155
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC)
MEMO:
AT-156
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC)
K: CHECK SPORT SHIFT INDICATOR.
DIAGNOSIS:
SPORT shift indicator output signal circuit is open or shorted.
TROUBLE SYMPTOM:
• SPORT shift indicator does not illuminate or remains illuminated.
• SPORT shift indicator display does not change.
WIRING DIAGRAM:
AT-00791
BATTERY
No.
5
IGNITION
RELA
Y
i11
i10
i1
B36
B56
COMBINATION
METER
TCM
E
B5
A4
A8
B36
B4 B5 B6
A4 A5 A6
C5 C6
F6
D4 D5 D6
F1
H1
C4
G6
G1
C2
K1
M1 M2
K6
L1
D1 D2
A1 A2
B1 B2
I6
J6
L2
I1
J1
H6
M4 M5 M6
L4 L5 L6
N5 N6
O4 O5 O6
N4
P4 P5
N2
O1 O2
P1 P2
N3
O3
P3
P6
A3
B3
C3
E4 E5 E6
E1 E2
A1
A2
A3
M6
J6
K6
L6
12
4
3
13
SPORT SHIFT
INDICATOR
B56
1 2
7
8
9
5 6
3 4
10 11 12
19 20 21
13
14 15
16
17
18
22
23
24
i10
1 2 3 4 5 6 7
8 9 10 11 12 13 14
15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
i11
1 2 3
8 9 10
4
11 12 13 14 15 16
5 6 7
A:
B:
AT-157
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC)
Step
Value
Yes
No
1
CHECK SPORT SHIFT INDICATOR.
Does SPORT shift indicator operate normally
when driving in SPORT shift mode?
SPORT shift indicator operates
normally.
<Ref. to AT-158,
CHECK BUZZER.,
Diagnostic Proce-
dure for No-diag-
nostic Trouble
Code (DTC).>
2
CHECK COMBINATION METER.
Do meters and indicators other than SPORT
shift indicator operate normally?
Combination meter operates
normally.
Check combina-
tion meter.
3
CHECK HARNESS CONNECTOR BETWEEN
TCM AND COMBINATION METER.
1) Turn ignition switch to OFF.
2) Disconnect connector from TCM and com-
bination meter.
3) Measure resistance of harness between
TCM and combination meter.
Connector & terminal
(B56) No. 3 — (i10) No. 2:
(B56) No. 4 — (i10) No. 1:
(B56) No. 12 — (i10) No. 4:
(B56) No. 13 — (i10) No. 3:
Is the measured value less than the speci-
fied value?
1
Ω
Repair open circuit
in harness
between TCM and
combination meter
connector and
poor contact in
coupling connec-
tor.
4
CHECK HARNESS CONNECTOR BETWEEN
TCM AND COMBINATION METER.
Measure resistance between TCM and chassis
ground.
Connector & terminal
(B56) No. 3 — Chassis ground:
(B56) No. 4 — Chassis ground:
(B56) No. 12 — Chassis ground:
(B56) No. 13 — Chassis ground:
Does the measured value exceed the spec-
ified value?
1 M
Ω
Repair short circuit
in harness
between TCM and
combination meter
connector.
5
CHECK OUTPUT SIGNAL EMITTED FROM
TCM.
1) Connect connector to TCM and combina-
tion meter.
2) Turn ignition switch to ON. (Engine is
stopped.)
3) Measure voltage between TCM and chas-
sis ground.
Connector & terminal
(B56) No. 3 (+) — Chassis ground (–):
(B56) No. 4 (+) — Chassis ground (–):
(B56) No. 12 (+) — Chassis ground (–):
(B56) No. 13 (+) — Chassis ground (–):
Does the measured value exceed the spec-
ified value?
4 V
Replace combina-
tion meter.
6
CHECK POOR CONTACT.
Is there poor contact in SPORT shift indicator
circuit?
There is poor contact.
Repair poor con-
tact.
Replace TCM.
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