Subaru LEGACY 2006 Manual page 3424

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
7 CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND ATF TEMPERATURE
SENSOR.
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 support with rigid
racks.
NOTE:
Raise all wheels off the floor.
5) Drain the automatic transmission fluid.
CAUTION:
Do not drain ATF until it cools down.
6) Remove the oil pan, and disconnect the
control valve connector.
7) Measure the resistance of harness
between ATF temperature sensor and trans-
mission connector.
Connector & terminal
(T4) No. 11 — (AT11) No. 1:
8 CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND ATF TEMPERATURE
SENSOR.
Measure the resistance of harness between
ATF temperature sensor and transmission con-
nector.
Connector & terminal
(T4) No. 15 — (AT11) No. 3:
9 CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND ATF TEMPERATURE
SENSOR.
Measure the resistance of harness between
transmission connector and transmission
ground.
Connector & terminal
(T4) No. 11 — Transmission ground:
10 CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND ATF TEMPERATURE
SENSOR.
Measure the resistance of harness between
transmission connector and transmission
ground.
Connector & terminal
(T4) No. 15 — Transmission ground:
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?
4AT(diag)-38
Yes No
Go to step 8. Repair the open
circuit of harness
between ATF tem-
perature sensor
and transmission
connector.
Go to step 9. Repair the open
circuit of harness
between ATF tem-
perature sensor
and transmission
connector.
Go to step 10. Repair the short
circuit of harness
between ATF tem-
perature sensor
and transmission
connector.
Replace the con- Repair the short
trol valve body. circuit of harness
<Ref. to 4AT-57, between ATF tem-
Control Valve perature sensor
Body.> and transmission
connector.