Subaru Legacy 2005 Service Manual page 2259

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
4 CHECK OUTPUT SIGNAL EMITTED FROM
TCM USING SUBARU SELECT MONITOR.
1) Connect the connectors to TCM and trans-
mission.
2) Connect the Subaru Select Monitor to data
link connector.
3) Turn the ignition switch to ON (engine
OFF), and turn the Subaru Select Monitor
power switch to 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 solenoid
using Subaru Select Monitor.
• Transfer duty solenoid is indicated in "%".
5 CHECK OUTPUT SIGNAL EMITTED FROM
TCM USING SUBARU SELECT MONITOR.
1) Shift the select lever to "D" range.
2) Read the data of transfer duty solenoid
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 floor.
2) Drain the ATF.
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
(AT3) 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 — (AT3) No. 5:
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Check
Is the measured value approx.
5%?
Is the measured value 18 —
35%?
Is there poor contact in transfer
duty solenoid circuit?
Is the resistance 2.0 — 6.0 Ω? Go to step 8.
Is the resistance less than 1
Ω?
4AT(diag)-87
Yes
Go to step 5. Go to step 6.
Even if the SPORT Go to step 6.
indicator light is
blinking, the cir-
cuit has returned
to normal condi-
tion at this time. A
temporary poor
contact of connec-
tor or harness may
be the cause.
Repair the har-
ness or connector
in TCM and trans-
mission.
Repair the poor Replace the TCM.
contact. <Ref. to 4AT-66,
Transmission Con-
trol Module
(TCM).>
Replace the con-
trol valve body.
<Ref. to 4AT-62,
Control Valve
Body.>
Go to step 9. Repair the open
circuit of harness
between transfer
duty solenoid and
transmission con-
nector.
No