Subaru LEGACY 2006 Manual page 3547

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
O: DTC P0741 TORQUE CONVERTER CLUTCH CIRCUIT PERFORMANCE OR
STUCK OFF
DTC DETECTING CONDITION:
• Defective lock-up clutch or torque converter assembly
• Defective control valve
• Defective turbine speed sensor 1 or 2
TROUBLE SYMPTOM:
No lock-up occurs. (After engine is warmed-up)
Step
1 CHECK DTC OF TCM.
2 DRIVING CHECK FOR LOCK-UP CONDI-
TION.
1) Perform a drive check based on the Inspec-
tion Mode with the following conditions. <Ref.
to 5AT(diag)-20, PROCEDURE, Inspection
Mode.>
(1) Read the current data of throttle open-
ing angle using Subaru Select Monitor.
<Ref. to 5AT(diag)-16, READ CURRENT
DATA, OPERATION, Subaru Select Moni-
tor.>
(2) Keep the same vehicle speed at 60 km/
h with 10% or less throttle opening angle
which is read currently on Subaru Select
Monitor. <Ref. to 5AT(diag)-16, READ
CURRENT DATA, OPERATION, Subaru
Select Monitor.>
(3) Read the current data of L/U solenoid
target pressure using Subaru Select Moni-
tor. <Ref. to 5AT(diag)-16, READ CUR-
RENT DATA, OPERATION, Subaru Select
Monitor.>
(4) Check the engine speed and turbine
speed when the L/U solenoid target value
displayed on Subaru Select Monitor is 500
kPa or more.
Check
Is any DTC of the followings
detected? P0715, P0725,
P0753, P0758, P0763, P0768,
P0773, P0751, P0756, P0761,
P0766, P0771, P1710, P1718,
P1798, P1799
Are the engine speed and tur-
bine speed almost the same?
5AT(diag)-54
Yes No
Go to step 2.
Perform the diag-
nosis according to
each DTC.
Temporary poor Go to step 3.
contact or open
circuit occurs.
Recheck that the
harness connec-
tor has no faulty.