Subaru Legacy 2003 Service Manual page 2377

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
P: DTC 78 SPORT SHIFT SOLENOID
DIAGNOSIS:
Output signal circuit of SPORT shift solenoid is open or shorted.
TROUBLE SYMPTOM:
Engine brake is effective at D, 3, 2, ranges.
WIRING DIAGRAM:
B11
1 2 3 4
1 2
5 6 7 8 10 11 12
9 10 11 12
19 20 21
13 14 15 16
17 18 19 20
B54
3 4 5 6 7 8 9
13 14 15 16 17 18
22 23 24
TCM
B54
B11
T4
AT10
TRANSMISSION
AT-102
AT-00663