Subaru Legacy 2005 Service Manual page 2245

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
4 CHECK OUTPUT SIGNAL EMITTED FROM
TCM USING SUBARU SELECT MONITOR.
1) Connect all the connectors.
2) Connect the Subaru Select Monitor to data
link connector.
3) Start the engine, and turn the Subaru
Select Monitor power switch to ON.
4) Warm-up the transmission until the ATF
temperature exceeds approx. 80°C (176°F).
NOTE:
If the ambient temperature is below 0°C (32°F),
drive the vehicle until the ATF reaches its oper-
ating temperature.
5) Stop the engine and turn the ignition switch
to ON (engine OFF).
6) Shift the select lever to "N" range, and
depress the accelerator pedal.
7) Read the data of 2-4 brake duty solenoid
using Subaru Select Monitor.
• 2-4 brake duty solenoid is indicated in "%".
5 CHECK OUTPUT SIGNAL EMITTED FROM
TCM USING SUBARU SELECT MONITOR.
Shift the select lever to 2nd on manual mode.
6 CHECK POOR CONTACT.
7 CHECK 2-4 BRAKE DUTY SOLENOID (IN
TRANSMISSION).
1) Remove the transmission connector from
bracket.
2) Drain the ATF.
CAUTION:
Do not drain ATF until it cools down.
3) Remove the oil pan, and disconnect the
connector from 2-4 brake duty solenoid.
4) Measure the resistance of harness
between 2-4 brake duty solenoid connector
and transmission ground.
Connector & terminal
(AT3) No. 6 — Transmission ground:
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Check
Is the value 100%?
Is the value 0%?
Is there poor contact in 2-4
brake duty solenoid circuit?
Is the resistance 2.0 — 6.0 Ω? Go to step 8.
4AT(diag)-73
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.>
No