Subaru Legacy 2005 Service Manual page 2526

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
6 CHECK INPUT SIGNAL FOR TCM USING
SUBARU SELECT MONITOR.
1) Connect all the connectors.
2) Jack-up the vehicle and support with rigid
racks.
NOTE:
Raise all wheels off floor.
3) Start the engine, and set the vehicle in 1st
speed driving condition of manual mode.
4) Read the current data of torque converter
turbine speed 2 using Subaru Select Monitor.
<Ref. to 5AT(diag)-17, OPERATION, Subaru
Select Monitor.>
NOTE:
The speed difference between front and rear
wheels may light the ABS warning light, but this
indicates no malfunction. When AT control di-
agnosis is finished, perform the ABS memory
clearance procedure of on-board diagnostics
system. <Ref. to ABS(diag)-26, Clear Memory
Mode.>
7 CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND CONTROL VALVE
BODY.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from transmis-
sion.
3) Remove the transmission connector from
bracket.
4) Jack-up the vehicle and place it on rigid
racks.
NOTE:
Raise all wheels off floor.
5) Drain the ATF.
CAUTION:
Do not drain the ATF until it cools down.
6) Remove the oil pan, and disconnect the
connector from control valve body connector.
7) Measure the resistance between transmis-
sion connector and control valve body connec-
tor.
Connector & terminal
(T3) No. 6 — (T11) No. 3:
(T4) No. 7 — (T10) No. 15:
8 CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND CONTROL VALVE
BODY.
Measure the resistance between transmission
ground and control valve body connector.
Connector & terminal
(T11) No. 3 — Transmission ground:
(T10) No. 15 — Transmission ground:
Check
Does the value of the turbine
speed sensor 2 change
depending on the acceleration,
deceleration and shifting gear
of the vehicle? Also, is the
value of turbine speed sensor
2 between 1,300 — 1,400 rpm
when the value of torque con-
verter turbine speed sensor is
2,000 rpm?
Is the resistance less than 1
Ω?
Is the resistance more than 1
MΩ?
5AT(diag)-108
Yes
Even if the SPORT Go to step 7.
indicator lights
blinks, the system
is in normal condi-
tion. A temporary
poor contact of
connector or har-
ness may be the
cause. Repair the
poor contact in
harness of turbine
speed sensor 2
and transmission
connector.
Go to step 8. Repair the open
circuit of harness
between control
valve body con-
nector and trans-
mission connector.
Replace the con- Repair the short
trol valve body. circuit of harness
<Ref. to 5AT-58, between transmis-
Control Valve sion connector
Body.> and transmission
ground.
No