Subaru Legacy 2005 Service Manual page 2523

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
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. 23 — (B11) No. 8:
(B54) No. 5 — Chassis ground:
(B54) No. 14 — Chassis ground:
2 CHECK HARNESS CONNECTOR BETWEEN
TCM AND CHASSIS GROUND.
Measure the resistance of harness between
TCM connector and chassis ground.
Connector & terminal
(B55) No. 23 — Chassis ground:
3 CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND CONTROL VALVE
BODY.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from transmis-
sion.
3) Remove the transmission connector from
bracket.
4) Jack-up the vehicle and place it on rigid
racks.
NOTE:
Raise all wheels off floor.
5) Drain the ATF.
CAUTION:
Do not drain the ATF until it cools down.
6) Remove the oil pan, and disconnect the
control valve body connector.
7) Measure the resistance between transmis-
sion connector and control valve body connec-
tor.
Connector & terminal
(T4) No. 8 — (T11) No. 11:
4 CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND CONTROL VALVE
BODY.
Measure the resistance between transmission
ground and control valve body connector.
Connector & terminal
(T11) No. 11 — Transmission ground:
5 CHECK AWD SOLENOID.
Measure the resistance between transmission
ground and control valve body connector.
Connector & terminal
(T11) No. 11 — Transmission ground:
6 CHECK POOR CONTACT.
Check that there are no poor contact in TCM
connector, transmission connector and control
valve body connector.
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Check
Is the resistance less than 1
Ω?
Is the resistance more than 1
MΩ?
Is the resistance less than 1
Ω?
Is the resistance more than 1
MΩ?
Is the resistance 3 — 9 Ω
Is there any loosing terminal,
entering foreign matter, dam-
aging connector body?
5AT(diag)-105
Yes
Go to step 2. Repair the open
circuit of harness
between TCM con-
nector and trans-
mission connector.
Go to step 3. Repair the short
circuit of harness
between TCM con-
nector and trans-
mission connector.
Go to step 4. Repair the open
circuit of harness
between control
valve body con-
nector and trans-
mission connector.
Go to step 5. Repair the short
circuit of harness
between control
valve body con-
nector and trans-
mission ground.
Go to step 6. Replace the con-
trol valve body.
<Ref. to 5AT-58,
Control Valve
Body.>
Repair the poor Go to step 7.
contact.
No