Subaru 2002 IMPREZA Service Manual page 1672

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
M: DTC 75 LINE PRESSURE DUTY SOLENOID
DIAGNOSIS:
The 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
9 11 12
10
14 15
13 16
20
17 18 19
Step
1 CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
1)Turn the ignition switch to OFF.
2)Disconnect the connector from transmission
and TCM.
3)Measure the resistance of harness between
TCM and transmission connector.
Connector & terminal
(B54) No. 9 — (B11) No. 5:
2 CHECK HARNESS CONNECTOR BETWEEN
TCM AND CHASSIS GROUND.
Measure the resistance of harness between
TCM and chassis ground.
Connector & terminal
(B54) No. 9 — Chassis ground:
3 CHECK LINE PRESSURE DUTY SOLENOID.
Measure the resistance between transmission
connector receptacle's terminals.
Terminal
(T4) No. 5 — No. 16:
4 PREPARE SUBARU SELECT MONITOR.
B54 TCM
TRANSMISSION
B54
1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16 17 18
19 20 21 22 23 24
Is the resistance less than 1
Ω?
Is the resistance more than 1
MΩ?
Is the resistance between 2.0
and 4.5 Ω?
Do you have a Subaru Select
Monitor?
AT-86
B11
T4
AT2
LINE
PRESSURE
DUTY
SOLENOID
Check
Go to step 2.
Go to step 3.
Go to step 4.
Go to step 7.
TR0414
Yes No
Repair the open
circuit in harness
between TCM and
transmission con-
nector.
Repair the short
circuit in harness
between TCM and
transmission con-
nector.
Go to step 10.
Go to step 5.