Subaru LEGACY 2006 Manual page 3463

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
4 CHECK OUTPUT SIGNAL FROM TCM US-
ING SUBARU SELECT MONITOR.
1) Connect the connectors to TCM and trans-
mission.
2) Connect the Subaru Select Monitor to the
data link connector.
3) Turn the ignition switch to ON (engine OFF)
and Subaru Select Monitor switch ON.
4) Shift the select lever to the "N" range, and
fully close the throttle pedal. (Vehicle speed is
0 km/h (0 MPH))
5) Read the data of "Transfer duty Ratio" using
Subaru Select Monitor.
Transfer duty solenoid is indicated in "%."
5 CHECK OUTPUT SIGNAL FROM TCM US-
ING SUBARU SELECT MONITOR.
1) Shift the select lever to "D" range.
2) Read the data of "Transfer duty Ratio" using
Subaru Select Monitor.
Transfer duty solenoid is indicated in "%."
6 CHECK POOR CONTACT.
7 CHECK TRANSFER DUTY SOLENOID (IN
TRANSMISSION).
1) Lift up the vehicle and support with rigid
racks.
NOTE:
Raise all wheels off the floor.
2) Drain the automatic transmission fluid.
CAUTION:
Do not drain ATF until it cools down.
3) Remove the extension case, and discon-
nect the connector from transfer duty solenoid.
4) Measure the resistance between transfer
duty solenoid connector and transmission
ground.
Connector & terminal
(AT12) No. 5 — Transmission ground:
8 CHECK HARNESS CONNECTOR BETWEEN
TRANSFER DUTY SOLENOID AND TRANS-
MISSION.
Measure the resistance of harness between
transfer duty solenoid and transmission con-
nector.
Connector & terminal
(T4) No. 8 — (AT12) No. 5:
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Check
Is the value approx. 5%?
Is the measured value approx.
18 — 35%?
Is there poor contact in transfer
duty solenoid circuit?
Is the resistance between 2.0
— 6.0 Ω?
Is the resistance less than 1
Ω?
4AT(diag)-77
Yes No
Go to step 5. Go to step 6.
Even if the SPORT Go to step 6.
indicator light is
blinking, the cir-
cuit is in normal
condition at this
time. A temporary
poor contact of
connector or har-
ness may be the
cause. Repair the
harness or con-
nector in TCM and
transmission.
Repair the poor Replace the TCM.
contact. <Ref. to 4AT-62,
Transmission Con-
trol Module
(TCM).>
Go to step 8. Replace the con-
trol valve body.
<Ref. to 4AT-57,
Control Valve
Body.>
Go to step 9.
Repair the open
circuit of harness
between transfer
duty solenoid and
transmission con-
nector.