Subaru Legacy 2005 Service Manual page 2226

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
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
(B54) No. 6 — (B11) No. 14:
2 CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
Measure the resistance of harness between
TCM and transmission connector.
Connector & terminal
(B54) No. 15 — (B11) No. 18:
3 CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
Measure the resistance of harness between
TCM and transmission connector.
Connector & terminal
(B54) No. 6 — Chassis ground:
4 CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
Measure the resistance of harness between
TCM and transmission connector.
Connector & terminal
(B54) No. 15 — Chassis ground:
5 CHECK FRONT VEHICLE SPEED SENSOR.
Measure the resistance between transmission
connector receptacle's terminals.
Connector & terminal
(T4) No. 14 — No. 18:
Check
Is the resistance less than 1
Ω?
Is the resistance less than 1
Ω?
Is the resistance more than 1
MΩ?
Is the resistance more than 1
MΩ?
Is the resistance 450 — 650
Ω?
4AT(diag)-54
Yes
Go to step 2. Repair the open
circuit of harness
between TCM and
transmission con-
nector.
Go to step 3. Repair the open
circuit of harness
between TCM and
transmission con-
nector, and poor
contact in connec-
tor.
Go to step 4. Repair the short
circuit of harness
between TCM and
transmission con-
nector.
Go to step 5. Repair the short
circuit of harness
between TCM and
transmission con-
nector, and poor
contact in connec-
tor.
Go to step 6. Replace the front
vehicle speed sen-
sor. <Ref. to 4AT-
55, Front Vehicle
Speed Sensor.>
No