Subaru Legacy 2004 Service Manual page 2519

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
O: DTC P0741 TORQUE CONVERTER CLUTCH CIRCUIT PERFORMANCE OR
STUCK OFF
DTC DETECTING CONDITION:
• Lock up clutch malfunction
• Locking of bulb
TROUBLE SYMPTOM:
No lock-up occurs. (After engine is warmed-up)
Step
1 CHECK DTC OF TCM.
2 CHECK DTC OF TCM.
1) Perform the clear memory mode. <Ref. to
5AT(diag)-18, CLEAR MEMORY MODE,
OPERATION, Subaru Select Monitor.>
2) Read DTC.
3 CHECK INHIBITOR SWITCH CIRCUIT.
Diagnose according to DTC P0705 procedure.
4 CHECK STOP LIGHT SWITCH CIRCUIT.
Diagnose according to DTC P0719 and P0724
procedure.
5 CHECK ATF TEMPERATURE SENSOR CIR-
CUIT.
Diagnose according to DTC P0712, P0713,
P1716 and P1717 procedure.
Check
Is any of following DTC
detected?
' AT CAN Communication Cir-
cuit
' Engine Speed Input Circuit
' Input/Turbine Speed Sensor
Circuit
' Torque Converter Turbine 2
Speed Signal Circuit 2 Mal-
function
Is DTC displayed?
Is there any trouble?
Is there any trouble?
Is there any trouble?
5AT(diag)-60
Yes
Perform the diag- Go to step 2.
nosis according to
each DTC.
Perform the diag- Go to step 3.
nosis according to
DTC.
Repair or replace Go to step 4.
the inhibitor switch
circuit.
Repair or replace Go to step 5.
the stop light
switch circuit.
Repair or replace There are mal-
the ATF tempera- functions in TCM,
ture sensor circuit. TCM connector
poor contact or
transmission
assembly mechan-
ical malfunction.
No