Page 1497 of 2248
WIRING DIAGRAM:
OBD0606
1CHECK ANY OTHER DTC (BESIDES DTC
P0740) ON DISPLAY.
: Is there any other DTC on display?
: Inspect the relevant DTC using“11. Diagnostics
Chart with Trouble Code”.
: Go to step 2.
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11. Diagnostics Chart with Trouble Code
Page 1498 of 2248
2
CHECK DUTY SOLENOID B CIRCUIT.
: Is there any trouble in duty solenoid B cir-
cuit?
: Repair or replace duty solenoid B circuit.
: Go to step 3.
3CHECK THROTTLE POSITION SENSOR CIR-
CUIT.
: Is there any trouble in throttle position sen-
sor circuit?
: Repair or replace throttle position sensor circuit.
: Go to step 4.
4
CHECK VEHICLE SPEED SENSOR 1 CIRCUIT.
: Is there any trouble in vehicle speed sensor
1 circuit?
: Repair or replace vehicle speed sensor 1 circuit.
: Go to step 5.
5
CHECK VEHICLE SPEED SENSOR 2 CIRCUIT.
: Is there any trouble in vehicle speed sensor
2 circuit?
: Repair or replace vehicle speed sensor 2 circuit.
: Go to step 6.
6
CHECK ENGINE SPEED INPUT CIRCUIT.
: Is there any trouble in engine speed input
circuit?
: Repair or replace engine speed input circuit.
: Go to step 7.
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11. Diagnostics Chart with Trouble Code
Page 1499 of 2248
7
CHECK INHIBITOR SWITCH CIRCUIT.
: Is there any trouble in inhibitor switch cir-
cuit?
: Repair or replace inhibitor switch circuit.
: Go to step 8.
8
CHECK BRAKE LIGHT SWITCH CIRCUIT.
: Is there any trouble in brake light switch cir-
cuit?
: Repair or replace brake light switch circuit.
: Go to step 9.
9CHECK ATF TEMPERATURE SENSOR CIR-
CUIT.
: Is there any trouble in ATF temperature sen-
sor circuit?
: Repair or replace ATF temperature sensor circuit.
: Go to next.
: Is there poor contact in TCM connector?
: Repair poor contact in TCM connector.
: Go to next.
: Is there any mechanical trouble in automatic
transmission?
: Repair or replace automatic transmission.
: Replace TCM with a new one.
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11. Diagnostics Chart with Trouble Code
Page 1500 of 2248
OBD0411
AW: DTC P0743
—TORQUE CONVERTER CLUTCH SYSTEM
(DUTY SOLENOID B) ELECTRICAL (LU)—
OBD0412A
DESCRIPTION:
This solenoid is mounted to the control valve, and its
duty ratio is controlled by the signal sent from TCM. It then
controls the lock-up control valve to provide smooth
engagement and disengagement of the lock-up clutch.
Regulates the hydraulic pressure of the lock-up clutch
and operates in three modes (open, smooth and lock-up).
DTC DETECTING CONDITION:
Two consecutive trips with fault
TROUBLE SYMPTOM:
No“locking-up”(after engine warm-up)
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11. Diagnostics Chart with Trouble Code
Page 1501 of 2248
1.Check harness connector between TCM and
duty solenoid B.
2.Check duty solenoid B’s ground line.
3.Check duty solenoid B.
4.Check output signal emitted from TCM.
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES.
[T3D0] and [T3E0].>
WIRING DIAGRAM:
OBD0413
NOTE:
For the diagnostic procedure on duty solenoid B circuit,
refer to“3-2 [T7B0]”.
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11. Diagnostics Chart with Trouble Code
Page 1502 of 2248
OBD0422
AX: DTC P0748
—PRESSURE CONTROL SOLENOID (DUTY
SOLENOID A) ELECTRICAL (PL)—
OBD0048B
DESCRIPTION:
This solenoid is mounted to the control valve, and its
duty ratio is controlled by the signal sent from TCM. This
solenoid then controls the pressure modifier valve and
pressure regulator valve to adjust the line pressure to an
optimum pressure level suitable for operating conditions.
Regulates the line pressure according to driving condi-
tions.
DTC DETECTING CONDITION:
Two consecutive trips with fault
TROUBLE SYMPTOM:
Excessive shift shock
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11. Diagnostics Chart with Trouble Code
Page 1503 of 2248
1.Check harness connector between TCM and
duty solenoid A.
2.Check harness connector between TCM and
dropping resistor.
3.Check duty solenoid A’s ground line.
4.Check dropping resistor.
5.Check duty solenoid A.
6.Check output signal emitted from TCM.
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES.
[T3D0] and [T3E0].>
WIRING DIAGRAM:
OBD0424
NOTE:
For the diagnostic procedure on duty solenoid A circuit,
refer to“3-2 [T7A0]”.
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11. Diagnostics Chart with Trouble Code
Page 1504 of 2248
OBD0434
AY: DTC P0753
—SHIFT SOLENOID A (SHIFT SOLENOID 1)
ELECTRICAL (SFT1)—
OBD0048C
DESCRIPTION:
These solenoids are mounted to the control valve. They
are turned ON or OFF according to signals sent from the
TCM. The gear positions are changed according to the ON
and OFF condition of these solenoids.
Controls shift stage by turning solenoid ON/OFF. Rela-
tionship between solenoid operation and shifting stage is
shown in table below. When shifting, timing is controlled for
each solenoid to reduce shock.
DTC DETECTING CONDITION:
Two consecutive trips with fault
TROUBLE SYMPTOM:
No shift
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11. Diagnostics Chart with Trouble Code