Subaru Legacy 2003 Service Manual page 2363

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
M: DTC 75 LINE PRESSURE DUTY SOLENOID
DIAGNOSIS:
Output signal circuit of line pressure duty solenoid is open or shorted.
TROUBLE SYMPTOM:
Excessive shift shock.
WIRING DIAGRAM:
B11
3 4
1 2
6 7 8
5
11 12
9 10
14 15
13
16
18 20
17 19
1 CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
1) Turn ignition switch to OFF.
2) Disconnect connector from transmission
and TCM.
3) Measure resistance of harness between
TCM and transmission connector.
Connector & terminal
(B54) No. 9 — (B11) No. 5:
Is the measured value less than the speci-
fied value?
2 CHECK HARNESS CONNECTOR BETWEEN
TCM AND CHASSIS GROUND.
Measure resistance of harness between TCM
and chassis ground.
Connector & terminal
(B54) No. 9 — Chassis ground:
Does the measured value exceed the specified
value?
B54
1 2 3 4 5 6
10 11 12 13 14 15 16 17 18
19 20 21
Step
B54 TCM
B11
T4
AT2
LINE
PRESSURE
DUTY
SOLENOID
TRANSMISSION
8 9
7
22 23 24
Value
1 Ω
1 MΩ
AT-88
Yes
Go to step 2. Repair open circuit
in harness
between TCM and
transmission con-
nector.
Go to step 3. Repair short circuit
in harness
between TCM and
transmission con-
nector.
AT-00587
No