Subaru 2006 Legacy, Manual

Page: 3547 / 4302

5AT(diag)-54
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 Check Yes No
1 CHECK DTC OF TCM.
Is any DTC of the followings
detected? P0715, P0725,
P0753, P0758, P0763, P0768,
P0773, P0751, P0756, P0761,
P0766, P0771, P1710, P1718,
P1798, P1799 Perform the diag-
nosis according to
each DTC. Go to step
2
.
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.
Are the engine speed and tur-
bine speed almost the same? Temporary poor
contact or open
circuit occurs.
Recheck that the
harness connec-
tor has no faulty. Go to step 3 .
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