Subaru 2002 IMPREZA Service Manual page 496

-
Check
Is there any other DTC on dis-
play?
Is there any trouble in lock-up
duty solenoid circuit?
Is there any trouble in throttle
position sensor circuit?
Is there any trouble in torque
converter turbine speed sensor
circuit?
DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
Yes
Inspect the rele-
vant DTC using
"List of Diagnostic
Trouble Code
(DTC)". <Ref. to
EN(D0HC
TURBO)-80, List
of Diagnostic Trou,
ble Code (DTC).>
Repair or replace
the lock-up duty
solenoid circuit.
Repair or replace
the throttle posi-
tion sensor circuit.
Repair or replace
the torque con-
verter turbine
speed sensor cir-
BU:DTC PO741
-
TORQUE CONVERTER CLUTCH SYSTEM MALFUNCTION
-
DTC DETECTING CONDITION:
TROUBLE SYMPTOM:
Two consecutive driving cycles with fault
No lock-up (after engine warm-up)
No shift or excessive tight corner "braking"
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(D0HC TURBO)-
49, OPERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(D0HC TURBO)-46, Inspec-
tion Mode.>.
Is there any trouble in engine
speed input circuit?
Is there any trouble in inhibitor
switch circuit?
Step
1
CHECK ANY OTHER DTC ON DISPLAY.
Repair or replace
the engine speed
input circuit.
Repair or replace
the inhibitor switch
circuit.
2 CHECK LOCK-UP DUTY SOLENOID CIR-
CUIT.
Check lock-up duty solenoid circuit. <Ref. to
Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>
CIRCUIT.
Check throttle position sensor circuit. <Ref. to
SOR, Diagnostic Procedure with Diagnostic
Trouble Code (DTC).>
4
CHECK TORQUE CONVERTER TURBINE
SPEED SENSOR CIRCUIT.
Check torque converter turbine speed sensor
circuit. <Ref. to AT-62, DTC 36 TORQUE CON.
VERTER TURBINE SPEED SENSOR, Diag-
nostic Procedure with Diagnostic Trouble Code
(DTC).>
CHECK ENGINE SPEED INPUT CIRCUIT.
Check engine speed input circuit. <Ref. to AT-
44, DTC 11 ENGINE SPEED SIGNAL, Diag-
nostic Procedure with Diagnostic Trouble Code
(DTC).>
Check inhibitor switch circuit. <Ref. to AT-1 15,
CHECK INHIBITOR SWITCH., Diagnostic Pro.
cedure for No-Diagnostic Trouble Code
(DTC).>
CHECK BRAKE LIGHT SWITCH CIRCUIT.
-
Check brake light switch circuit. <Ref. to AT-
112, CHECK BRAKE SWITCH., Diagnostic
Procedure for No-Diagnostic Trouble Code
(DTC).>
AT-94, DTC 77 LOCK-UP DUTY SOLENOID,
3 CHECK THROTTLE POSITION SENSOR
AT-52, DTC 31 THROTTLE POSITION SEN-
5
6 CHECK INHIBITOR SWITCH CIRCUIT.
7
cuit.
light switch circuit? the brake light
switch circuit.
No
Go to step 2.
Go to step 3.
Go to step 4.
Go to step 5.
Go to step 6.
Go to step 7.
Go to step 8.
EN(D0HC TURBO)-272