2006 NISSAN VERSA engine

DTC P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVE
CVT-105
D
E
F
G
H
I
J
K
L
MA
B
CVT
Revision: June 20062007 Versa
DTC P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVEPFP:31940
DescriptionUCS00609

The torque converter clutch solenoid valve is included in the control valve assembly.

The torque converter clutch solenoid valve is activated by the TCM in response to signals sent from the
vehicle speed and accelerator pedal position sensors. Lock-up piston operation will then be controlled.

Lock-up operation, however, is prohibited when CVT fluid temperature is too low.

When the accelerator pedal is depressed (less than 2.0/8) 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 ValueUCS0060A
Remarks: Specification data are reference values.
On Board Diagnosis LogicUCS0060B

This is an OBD-II self-diagnostic item.

Diagnostic trouble code “P0740 TCC SOLENOID/CIRC” with CONSULT-II is detected under the following
conditions.
–TCM detects an improper voltage drop when it tries to operate the solenoid valve.
Possible CauseUCS0060C

Torque converter clutch solenoid valve

Harness or connectors
(Solenoid circuit is open or shorted.)
DTC Confirmation ProcedureUCS0060D
NOTE:
If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch OFF and
wait at least 10 seconds before performing the next test.
After the repair, touch “ERASE” on “SELF-DIAG RESULTS” and then perform the following procedure to con-
firm the malfunction is eliminated.
WITH CONSULT-II
1. Turn ignition switch ON. (Do not start engine.)
2. Select “DATA MONITOR” mode for “TRANSMISSION” with
CONSULT-II and wait at least 10 consecutive seconds.
3. If DTC is detected, go to CVT-107, "
Diagnostic Procedure" .
WITH GST
Follow the procedure “WITH CONSULT-II”.
Item name Condition Display value (Approx.)
ISOLT1Lock-up OFF 0.0 A
Lock-up ON 0.7 A
BCIA0031E

DTC P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVE
CVT-107
D
E
F
G
H
I
J
K
L
MA
B
CVT
Revision: June 20062007 Versa
TCM terminal data are reference values, measured between each terminal and ground.
Diagnostic ProcedureUCS0060F
1. CHECK INPUT SIGNAL
With CONSULT-II
1. Start engine.
2. Select “MAIN SIGNALS” in “DATA MONITOR” mode for
“TRANSMISSION” with CONSULT-II.
3. Start vehicle and read out the value of “ISOLT1”.
Without CONSULT-II
1. Start engine.
2. Check voltage between TCM connector terminal and ground.
3. Turn ignition switch OFF.
4. Disconnect TCM connector.
5. Check if there is continuity between the connector terminal and
ground.
OK or NG
OK >> GO TO 5.
NG >> GO TO 2.
2. CHECK TORQUE CONVERTER CLUTCH SOLENOID VALVE CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect TCM connector.
3. Check resistance between TCM connector terminal and ground.
OK or NG
OK >> GO TO 5.
NG >> GO TO 3.
Terminal Wire color Item Condition Data (Approx.)
3SBTorque converter
clutch solenoid
valveWhen vehi-
cle cruises in
“D” position.When CVT performs lock-up. 6.0 V
When CVT does not perform lock-up. 1.0 V
Item name Condition Display value (Approx.)
ISOLT1Lock-up OFF 0.0 A
Lock-up ON 0.7 A
SCIA2349E
Name Connector Terminal ConditionVoltage
(Approx.)
To r q u e
converter
clutch sole-
noid valveE31 3 - groundWhen vehi-
cle cruises
in “D” posi-
tionLock-up ON 6.0 V
Lock-up OFF 1.0 V
SCIA7954E
Solenoid valve Connector TerminalResistance
(Approx.)
Torque converter clutch
solenoid valveE31 3 - Ground 5 - 20 Ω
SCIA1970E

CVT-110
DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP)
Revision: June 20062007 Versa
DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP)PFP:31940
DescriptionUCS0060H

The torque converter clutch solenoid valve is included in the control valve assembly.

This malfunction is detected when the torque converter clutch does not lock-up as instructed by the TCM.
This is not only caused by electrical malfunction (circuits open or shorted), but also by mechanical mal-
function such as control valve sticking, improper solenoid valve operation, etc.
CONSULT-II Reference ValueUCS0060I
Remarks: Specification data are reference values.
On Board Diagnosis LogicUCS0060J

This is an OBD-II self-diagnostic item.

Diagnostic trouble code “P0744 A/T TCC S/V FNCTN” with CONSULT-II is detected under the following
conditions.
–When CVT cannot perform lock-up even if electrical circuit is good.
–When TCM compares difference value with slip revolution and detects an irregularity.
Possible CauseUCS0060K

Torque converter clutch solenoid valve

Hydraulic control circuit
DTC Confirmation ProcedureUCS0060L
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch OFF and
wait at least 10 seconds before performing the next test.
After the repair, touch “ERASE” on “SELF-DIAG RESULTS” and then perform the following procedure to con-
firm the malfunction is eliminated.
WITH CONSULT-II
1. Turn ignition switch ON. (Do not start engine.)
2. Select “DATA MONITOR” mode for “TRANSMISSION” with
CONSULT-II.
3. Start engine and maintain the following condition for at least 30
seconds.
ACC PEDAL OPEN: More than 1.0/8
RANGE: “D” position
[Vehicle speed: Constant speed of more than 40 km/h (25
MPH)]
4. If DTC is detected go to C V T- 111 , "
Diagnostic Procedure" .
WITH GST
Follow the procedure “WITH CONSULT-II”.
Item name Condition Display value
ENG SPEED SIG Engine running Closely matches the tachometer reading.
PRI SPEED SEN During driving (lock-up ON) Approximately matches the engine speed.
BCIA0031E

DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP)
CVT-111
D
E
F
G
H
I
J
K
L
MA
B
CVT
Revision: June 20062007 Versa
Diagnostic ProcedureUCS0060M
1. CHECK INPUT SIGNALS
With CONSULT-II
1. Start engine.
2. Select “ECU INPUT SIGNALS” in “DATA MONITOR” mode for
“TRANSMISSION” with CONSULT-II.
3. Start vehicle.
4. Check if there is a great difference between “ENG SPEED SIG”
and “PRI SPEED SEN”. (Lock-up ON.)
OK or NG
OK >> GO TO 5.
NG >> GO TO 2.
2. CHECK LINE PRESSURE
Perform line pressure test. Refer to CVT-45, "
LINE PRESSURE TEST" .
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts. Refer to CVT-46, "
Judgement of Line Pressure Test" .
3. DETECT MALFUNCTIONING ITEM
Check the following:

Torque converter clutch solenoid valve. Refer to CVT-109, "Component Inspection" .

Lock-up select solenoid valve. Refer to CVT-162, "Component Inspection" .
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts.
4. CHECK OUTPUT SPEED SENSOR (SECONDARY SPEED SENSOR) SYSTEM AND INPUT SPEED
SENSOR (PRIMARY SPEED SENSOR) SYSTEM
Check output speed sensor (secondary speed sensor) system and input speed sensor (primary speed sensor)
system. Refer to CVT-95, "
DTC P0720 VEHICLE SPEED SENSOR CVT (SECONDARY SPEED SENSOR)" ,
CVT-90, "
DTC P0715 INPUT SPEED SENSOR CIRCUIT (PRI SPEED SENSOR)" .
OK or NG
OK >> GO TO 5.
NG >> Repair or replace damaged parts.
5. CHECK DTC
Perform CVT-110, "
DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 6.
Item name Condition Display value
ENG SPEED SIG Engine runningClosely matches the
tachometer reading.
PRI SPEED SEN During driving (lock-up ON)Approximately matches
the engine speed.
SCIA2279E

DTC P0745 LINE PRESSURE SOLENOID VALVE
CVT-113
D
E
F
G
H
I
J
K
L
MA
B
CVT
Revision: June 20062007 Versa
DTC P0745 LINE PRESSURE SOLENOID VALVEPFP:31940
DescriptionUCS0060N

The pressure control solenoid valve A (line pressure solenoid valve) in included in the control valve
assembly.

The pressure control solenoid valve A (line pressure solenoid valve) regulates the oil pump discharge
pressure to suit the driving condition in response to a signal sent from the TCM.
CONSULT-II Reference ValueUCS0060O
Remarks: Specification data are reference values.
On Board Diagnosis LogicUCS0060P

This is an OBD-II self-diagnostic item.

Diagnostic trouble code “P0745 L/PRESS SOL/CIRC” with CONSULT-II is detected under the following
conditions.
–TCM detects an improper voltage drop when it tries to operate the solenoid valve.
–When TCM compares target value with monitor value and detects an irregularity.
Possible CauseUCS0060Q

Harness or connectors
(Solenoid circuit is open or shorted.)

Pressure control solenoid valve A (Line pressure solenoid valve)
DTC Confirmation ProcedureUCS0060R
NOTE:
If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch OFF and
wait at least 10 seconds before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-II
1. Turn ignition switch ON and select “DATA MONITOR” mode for
“TRANSMISSION” with CONSULT-II.
2. Start engine and wait at least 5 seconds.
3. If DTC is detected, go to CVT-115, "
Diagnostic Procedure" .
WITH GST
Follow the procedure “WITH CONSULT-II”.
Item name Condition Display value (Approx.)
ISOLT2Release your foot from the accelerator pedal. 0.8 A
Press the accelerator pedal all the way down. 0.0 A
BCIA0031E

DTC P0745 LINE PRESSURE SOLENOID VALVE
CVT-115
D
E
F
G
H
I
J
K
L
MA
B
CVT
Revision: June 20062007 Versa
TCM terminal data are reference values, measured between each terminal and ground.
Diagnostic ProcedureUCS0060T
1. CHECK INPUT SIGNAL
With CONSULT-II
1. Start engine.
2. Select “MAIN SIGNALS” in “DATA MONITOR” mode for
“TRANSMISSION” with CONSULT-II.
3. Read out the value of “ISOLT2”.
Without CONSULT-II
1. Start engine.
2. Check voltage between TCM connector terminal and ground.
3. Turn ignition switch OFF.
4. Disconnect TCM connector.
5. Check if there is continuity between connector terminal and ground.
OK or NG
OK >> GO TO 5.
NG >> GO TO 2.
Terminal Wire color Item Condition Data (Approx.)
1GRPressure control
solenoid valve A
(Line pressure
solenoid valve)and Release your foot from the accelerator pedal. 5.0 - 7.0 V
Press the accelerator pedal all the way down. 1.0 - 3.0 V
Item name Condition Display value (Approx.)
ISOLT2Release your foot from
the accelerator pedal.0.8 A
Press the accelerator
pedal all the way down.0.0 A
SCIA2349E
Name Connector Terminal ConditionVoltage
(Approx.)
Pressure
control
solenoid
valve A
(Line pres-
sure sole-
noid valve)E31 1 - groundRelease your foot from
the accelerator pedal. 5.0 - 7.0 V
Press the accelerator
pedal all the way down.1.0 - 3.0 V
SCIA2348E

CVT-118
DTC P0746 PRESSURE CONTROL SOLENOID A PERFORMANCE (LINE PRES-
SURE SOLENOID VALVE)
Revision: June 20062007 Versa
DTC P0746 PRESSURE CONTROL SOLENOID A PERFORMANCE (LINE PRES-
SURE SOLENOID VALVE)
PFP:31941
DescriptionUCS0060V

The pressure control solenoid valve A (line pressure solenoid valve) are included in the control valve
assembly.

The pressure control solenoid valve A (line pressure solenoid valve) regulates the oil pump discharge
pressure to suit the driving condition in response to a signal sent from the TCM.
CONSULT-II Reference ValueUCS0060W
Remarks: Specification data are reference values.
On Board Diagnosis LogicUCS0060X

This is an OBD-II self-diagnostic item.

Diagnostic trouble code “P0746 PRS CNT SOL/A FCTN” with CONSULT-II is detected under the following
conditions.
–Unexpected gear ratio was detected in the LOW side due to excessively low line pressure.
Possible CauseUCS0060Y

Line pressure control system

Output speed sensor (Secondary speed sensor)

Input speed sensor (Primary speed sensor)
DTC Confirmation ProcedureUCS0060Z
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch OFF and
wait at least 10 seconds before performing the next test.
After the repair, touch “ERASE” on “SELF-DIAG RESULTS” and then perform the following procedure to con-
firm the malfunction is eliminated.
WITH CONSULT-II
1. Turn ignition switch ON and select “DATA MONITOR” mode for
“TRANSMISSION” with CONSULT-II.
2. Start engine and maintain the following conditions for at least 10
consecutive seconds. Test start from 0 km/h (0 MPH).
ATF TEMP SEN: 1.0 - 2.0 V
ACC PEDAL OPEN: More than 1.0/8
RANGE: “D” position
VEHICLE SPEED: 10 km/h (6 MPH) More than
Driving location: Driving the vehicle uphill (increased
engine load) will help maintain the driving conditions
required for this test.
3. If DTC is detected, go to CVT-119, "
Diagnostic Procedure" .
WITH GST
Follow the procedure “WITH CONSULT-II”.
Item name Condition Display value (Approx.)
PRI PRESS “N” position idle 0.4 MPa
BCIA0031E

DTC P0746 PRESSURE CONTROL SOLENOID A PERFORMANCE (LINE PRES-
SURE SOLENOID VALVE)
CVT-119
D
E
F
G
H
I
J
K
L
MA
B
CVT
Revision: June 20062007 Versa
Diagnostic ProcedureUCS00610
1. CHECK INPUT SIGNAL
With CONSULT-II
1. Start engine.
2. Select “MAIN SIGNALS” in “DATA MONITOR” mode for
“TRANSMISSION” with CONSULT-II.
3. Start vehicle and read out the value of “PRI PRESS”.
Without CONSULT-II
1. Start engine.
2. Check voltage between TCM connector terminal and ground.
OK or NG
OK >> GO TO 5.
NG >> GO TO 2.
2. CHECK LINE PRESSURE
Perform line pressure test. Refer to CVT-45, "
LINE PRESSURE TEST" .
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts. Refer to CVT-46, "
Judgement of Line Pressure Test" .
3. DETECT MALFUNCTIONING ITEM
Check pressure control solenoid valve A (line pressure solenoid valve). Refer to CVT-117, "
Component
Inspection" .
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts.
4. CHECK OUTPUT SPEED SENSOR (SECONDARY SPEED SENSOR) SYSTEM AND INPUT SPEED
SENSOR (PRIMARY SPEED SENSOR) SYSTEM
Check output speed sensor (secondary speed sensor) system and input speed sensor (primary speed sensor)
system. Refer to CVT-95, "
DTC P0720 VEHICLE SPEED SENSOR CVT (SECONDARY SPEED SENSOR)" ,
CVT-90, "
DTC P0715 INPUT SPEED SENSOR CIRCUIT (PRI SPEED SENSOR)" .
OK or NG
OK >> GO TO 5.
NG >> Repair or replace damaged parts.
Item name Condition Display value (Approx.)
PRI PRESS “N” position idle 0.4 MPa
SCIA2366E
Name Connector Terminal ConditionVoltage
(Approx.)
Transmission
fluid pressure
sensor B (Pri-
mary pressure
sensor)E32 41 - Ground “N” position idle 0.7 V
SCIA1922E