Subaru LEGACY 2006 Manual page 3557

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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 connector and transmission
connector.
Connector & terminal
(B54) No. 24 — (B11) No. 17:
(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
(B54) No. 24 — 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) Lift up the vehicle and place it on rigid
racks.
NOTE:
Raise all wheels off floor.
5) Drain the ATF.
CAUTION:
Do not drain 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. 17 — (T16) No. 9:
4 CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND CONTROL VALVE
BODY.
Measure the resistance between transmission
ground and control valve body connector.
Connector & terminal
(T16) No. 9 — Transmission ground:
5 CHECK FRONT BRAKE SOLENOID.
Measure the resistance between transmission
ground and control valve body connector.
Connector & terminal
(T16) No. 9 — Transmission ground:
6 CHECK POOR CONTACT.
Check that there are no poor contact in TCM
connector, transmission connector and control
valve body connector.
7 CHECK AFTER REPAIR.
1) Perform the Clear Memory Mode.
2) Drive for a while, read the DTC, and check
that there is no faulty.
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 between 3 —
9 Ω?
Is there any loosing terminal,
entering foreign matter, dam-
aging connector body?
Is DTC displayed?
5AT(diag)-64
Yes No
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 transmis-
sion connector
and control valve
body connector.
Go to step 5.
Repair the short
circuit of harness
between control
valve body and
transmission con-
nector.
Go to step 6. Replace the con-
trol valve body.
<Ref. to 5AT-53,
Control Valve
Body.>
Go to step 7.
Repair the poor
contact.
Replace the TCM. Temporary poor
contact or open
<Ref. to 5AT-56,
circuit occurs.
Transmission Con-
Recheck that the
trol Module
harness connec-
(TCM).>
tor has no faulty.