Subaru Legacy 2004 Service Manual page 2293

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
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 Subaru Select Monitor switch to ON.
4) Shift the select lever to "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 the 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:
Check
Is the value approx. 5%?
Is the value 18 — 35%?
Is there poor contact in transfer
duty solenoid circuit?
Is the resistance 2.0 — 6.0 "? Go to step 8.
Is the resistance less than 1
"?
4AT(diag)-90
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-65,
Transmission Con-
trol Module
(TCM).>
Replace the con-
trol valve body.
<Ref. to 4AT-60,
Control Valve
Body.>
Go to step 9. Repair the open
circuit in harness
between transfer
duty solenoid and
transmission con-
nector.
No