Subaru Legacy 2002 Service Manual page 1855

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
Automatic Transmission (Diagnostics)
M: DTC 76 2-4 BRAKE DUTY SOLENOID
DIAGNOSIS:
Output signal circuit of 2-4 brake duty solenoid is open or shorted.
TROUBLE SYMPTOM:
Excessive shift shock.
WIRING DIAGRAM:
No.
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. 18 — (B11) No. 9:
2 CHECK HARNESS CONNECTOR
BETWEEN TCM AND CHASSIS GROUND.
Measure resistance of harness between TCM
and chassis ground.
Connector & terminal
(B54) No. 18 — Chassis ground:
3 CHECK 2-4 BRAKE DUTY SOLENOID.
Measure resistance between transmission
connector receptacle's terminals.
Terminal
(T4) No. 16 — No. 9:
4 PREPARE SUBARU SELECT MONITOR.
Step
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
S004521I22
Check Yes
Go to step 2.
Go to step 3.
Go to step 4.
Go to step 7.
TR0415
No
Repair open cir-
cuit in harness
between TCM and
transmission con-
nector.
Repair short cir-
cuit in harness
between TCM and
transmission con-
nector.
Go to step 10.
Go to step 5.