Subaru Legacy 2005 Service Manual page 2247

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
S: DTC P0763 SHIFT SOLENOID "C" ELECTRICAL
DTC DETECTING CONDITION:
Output signal circuit of high clutch duty solenoid is open or shorted.
TROUBLE SYMPTOM:
Excessive shift shock
WIRING DIAGRAM:
Step
1 CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from TCM and
transmission.
3) Measure the resistance of harness
between TCM and transmission connector.
Connector & terminal
(B55) No. 8 — (B11) No. 7:
2 CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
Measure the resistance of harness connector
between TCM connector and chassis ground.
Connector & terminal
(B55) No. 8 — Chassis ground:
3 CHECK HIGH CLUTCH DUTY SOLENOID.
Measure the resistance between transmission
connector receptacle's terminals.
Connector & terminal
(T4) No. 7 — No. 20:
B55
TCM
B11
T4
AT3
HIGH CLUTCH
DUTY
SOLENOID
TRANSMISSION
Is the resistance less than 1
Ω?
Is the resistance more than 1
MΩ?
Is the resistance 2.0 — 6.0 Ω? Go to step 4.
4AT(diag)-75
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
10 11 12
22 23 24 25 26
Check
Go to step 2.
Go to step 3.
B11
3 4
1 2
5 6 7 8
9 10 11 12
14 15
13 16
17 18 19 20
B55
1 2 3 4 5 6 7 8 9
13 14 15 16 17 18 19 20 21
27 28 29 30 31
AT3
1 2 3
4 5 6
AT-01489
Yes No
Repair the open
circuit of harness
between TCM and
transmission con-
nector.
Repair the short
circuit of harness
between TCM and
transmission con-
nector.
Go to step 7.