Page 185 of 3066
DTC P0734 A/T 4TH GEAR FUNCTION
AT-179
[EURO-OBD]
D
E
F
G
H
I
J
K
L
MA
B
AT
Component InspectionECS004RP
SOLENOID VALVES
lFor removal, refer toAT-454, "REMOVAL".
Resistance Check
lCheck resistance between two terminals.
SCIA0760E
Solenoid valve Terminal No.Resistance
(Approx.)
Shift solenoid
valve A2
Ground20 - 30W
Shift solenoid
valve B15-20W
Line pressure
solenoid valve42.5-5W
Page 186 of 3066
AT-180
[EURO-OBD]
DTC P0734 A/T 4TH GEAR FUNCTION
Operation Check
lCheck solenoid valve by listening for its operating sound while
applying battery voltage to the terminal and ground.
SCIA0759E
Page 187 of 3066
![NISSAN X-TRAIL 2003 Electronic Repair Manual DTCP0740TORQUECONVERTERCLUTCHSOLENOIDVALVE
AT-181
[EURO-OBD]
D
E
F
G
H
I
J
K
L
MA
B
AT
DTC P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVEPFP:31940
DescriptionECS004RQ
The torque converter clutch solenoi NISSAN X-TRAIL 2003 Electronic Repair Manual DTCP0740TORQUECONVERTERCLUTCHSOLENOIDVALVE
AT-181
[EURO-OBD]
D
E
F
G
H
I
J
K
L
MA
B
AT
DTC P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVEPFP:31940
DescriptionECS004RQ
The torque converter clutch solenoi](/manual-img/5/57402/w960_57402-186.png)
DTCP0740TORQUECONVERTERCLUTCHSOLENOIDVALVE
AT-181
[EURO-OBD]
D
E
F
G
H
I
J
K
L
MA
B
AT
DTC P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVEPFP:31940
DescriptionECS004RQ
The torque converter clutch solenoid valve is activated, with the gear
in “D
4”, by the TCM in response to signals sent from the vehicle
speed and throttle position sensors. Lock-up piston operation will
then be controlled.
Lock-up operation, however, is prohibited when A/T fluid tempera-
ture is too low.
When the accelerator pedal is depressed (less than 2/8) in lock-up
condition, the engine speed should not change abruptly. If there is a
big jump in engine speed, there is no lock-up.
CONSULT-II REFERENCE VALUE IN DATA MONITOR MODE
Remarks: Specification data are reference values.
TCM TERMINALS AND REFERENCE VALUE
Remarks: Specification data are reference values.
ON BOARD DIAGNOSIS LOGIC
DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION PROCEDURE
SCIA0718E
Monitor item Condition Specification
Torque converter clutch solenoid valve
dutyLock-up “OFF”
¯
Lock-up “ON”Approximately 4%
¯
Approximately 94%
Te r m i -
nal No.Wire color Item ConditionJudgement stan-
dard
(Approx.)
3GY/RTorque converter
clutch solenoid
valveWhen A/T performs lock-up. 8 - 15V
When A/T does not perform lock-up. 0V
Diagnostic trouble code Malfunction is detected when ... Check items (Possible cause)
: TCC SOLENOID/CIRC
TCM detects an improper voltage drop
when it tries to operate the solenoid valve.
lHarness or connectors
(The solenoid circuit is open or shorted.)
lT/C clutch solenoid valve
: P0740
Page 188 of 3066
AT-182
[EURO-OBD]
DTC P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVE
NOTE:
If “DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCE-
DURE” has been previously conducted, always turn ignition
switch “OFF” and wait at least 5 seconds before conducting the
next test.
After the repair, perform the following procedure to confirm the mal-
function is eliminated.
With CONSULT-II
1. Turn ignition switch “ON”.
2. Select“DATAMONITOR”modefor“ENGINE”withCONSULT-II
and wait at least 1 second.
With GST
Follow the procedure “With CONSULT-II”.
SAT014K
SAT020K
Page 189 of 3066
DTCP0740TORQUECONVERTERCLUTCHSOLENOIDVALVE
AT-183
[EURO-OBD]
D
E
F
G
H
I
J
K
L
MA
B
AT
Wiring Diagram — AT — TCVECS004RR
TCWA0043E
Page 190 of 3066
![NISSAN X-TRAIL 2003 Electronic Repair Manual AT-184
[EURO-OBD]
DTC P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVE
Diagnostic Procedure
ECS004RS
1.CHECK VALVE RESISTANCE
1. Turn ignition switch to “OFF” position.
2. Disconnect terminal cord ass NISSAN X-TRAIL 2003 Electronic Repair Manual AT-184
[EURO-OBD]
DTC P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVE
Diagnostic Procedure
ECS004RS
1.CHECK VALVE RESISTANCE
1. Turn ignition switch to “OFF” position.
2. Disconnect terminal cord ass](/manual-img/5/57402/w960_57402-189.png)
AT-184
[EURO-OBD]
DTC P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVE
Diagnostic Procedure
ECS004RS
1.CHECK VALVE RESISTANCE
1. Turn ignition switch to “OFF” position.
2. Disconnect terminal cord assembly connector in engine compartment.
3. Check resistance between terminal 5 and ground.
OK or NG
OK >> GO TO 2
NG >> 1. Remove oil pan. Refer toAT-454, "
ON-VEHICLE
SERVICE".
2. Check the following items:
–Torque converter clutch solenoid valve
Refer to “Component Inspection”,AT-185, "
Compo-
nent Inspection".
–Harness of terminal cord assembly for short or open
2.CHECK POWER SOURCE CIRCUIT
1. Turn ignition switch to “OFF” position.
2. Disconnect TCM harness connector.
3. Check continuity between terminal 5 and TCM harness connector terminal 3.
If OK, check harness for short to ground and short to power.
4. Reinstall any part removed.
OK or NG
OK >> GO TO 3
NG >> Repair open circuit or short to ground or short to power
in harness or connectors.
3.CHECK DTC
Perform Diagnostic Trouble Code (DTC) confirmation procedure,AT- 1 8 1 , "
DIAGNOSTIC TROUBLE CODE
(DTC) CONFIRMATION PROCEDURE".
OK or NG
OK >>INSPECTION END
NG >> 1. Perform TCM input/output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector. Resistance : 5 - 20W
SCIA0731E
Continuity should exist.
SCIA0732E
Page 191 of 3066
DTCP0740TORQUECONVERTERCLUTCHSOLENOIDVALVE
AT-185
[EURO-OBD]
D
E
F
G
H
I
J
K
L
MA
B
AT
Component InspectionECS004RT
TORQUE CONVERTER CLUTCH SOLENOID VALVE
lFor removal, refer toAT-454, "REMOVAL".
Resistance Check
lCheck resistance between two terminals.
Operation Check
lCheck solenoid valve by listening for its operating sound while
applying battery voltage to the terminal and ground.
SCIA0733E
Solenoid valve Terminal No.Resistance
(Approx.)
Torque converter
clutch solenoid
valve5 Ground 5 - 20W
SCIA0734E
Page 192 of 3066
![NISSAN X-TRAIL 2003 Electronic Repair Manual AT-186
[EURO-OBD]
DTC P0745 LINE PRESSURE SOLENOID VALVE
DTC P0745 LINE PRESSURE SOLENOID VALVE
PFP:31940
DescriptionECS004RU
The line pressure solenoid valve regulates the oil pump discharge
pressure NISSAN X-TRAIL 2003 Electronic Repair Manual AT-186
[EURO-OBD]
DTC P0745 LINE PRESSURE SOLENOID VALVE
DTC P0745 LINE PRESSURE SOLENOID VALVE
PFP:31940
DescriptionECS004RU
The line pressure solenoid valve regulates the oil pump discharge
pressure](/manual-img/5/57402/w960_57402-191.png)
AT-186
[EURO-OBD]
DTC P0745 LINE PRESSURE SOLENOID VALVE
DTC P0745 LINE PRESSURE SOLENOID VALVE
PFP:31940
DescriptionECS004RU
The line pressure solenoid valve regulates the oil pump discharge
pressure to suit the driving condition in response to a signal sent
from the TCM.
The line pressure duty cycle value is not consistent when the
closed throttle position switch is “ON”. To confirm the line
pressure duty cycle at low pressure, the accelerator (throttle)
should be open until the closed throttle position switch is
“OFF”.
CONSULT-II REFERENCE VALUE IN DATA MONITOR MODE
Remarks: Specification data are reference values.
NOTE:
The line pressure duty cycle value is not consistent when the closed throttle position switch is “ON”. To confirm the line pressure duty
cycle at low pressure, the accelerator (throttle) should be open until the closed throttle position switch is “OFF”.
TCM TERMINALS AND REFERENCE VALUE
Remarks: Specification data are reference values.
ON BOARD DIAGNOSIS LOGIC
SCIA0735E
Monitor item Condition Specification
Line pressure solenoid valve dutySmall throttle opening
(Low line pressure)
¯
Large throttle opening
(High line pressure)Approximately 24%
¯
Approximately 95%
Te r m i -
nal No.Wire color Item ConditionJudgement stan-
dard
(Approx.)
1R/WLine pressure
solenoid valveWhen releasing accelerator pedal
after warming up engine.1.5 - 2.5V
When depressing accelerator pedal
fully after warming up engine.0V
2P/BLine pressure
solenoid valve
(with dropping
resistor)When releasing accelerator pedal
after warming up engine.5 - 14V
When depressing accelerator pedal
fully after warming up engine.0V
Diagnostic trouble code Malfunction is detected when ... Check items (Possible cause)
: L/PRESS SOL/CIRC
TCM detects an improper voltage drop
when it tries to operate the solenoid valve.
lHarness or connectors
(The solenoid circuit is open or shorted.)
lLine pressure solenoid valve
: P0745