2009 NISSAN LATIO service

DTC P1740 LOCK-UP SELECT
SOLENOID VALVE CIRCUIT
CVT-307
< SERVICE INFORMATION >
[RE0F08B] D
E
F
G H
I
J
K L
M A
B CVT
N
O P
Wiring Diagram - CVT - L/USSV
INFOID:0000000004305769
TCM TERMINALS AND REFERENCE VALUES Refer to CVT-228, " TCM Terminal and Reference Value " . BCWA0680E

CVT-308< SERVICE INFORMATION >
[RE0F08B]
DTC P1740 LOCK-UP SELECT
SOLENOID VALVE CIRCUIT
Diagnosis Procedure INFOID:00000000043057701.
CHECK INPUT SIGNAL
With CONSULT-III
1. Turn ignition switch ON.
2. Select “SELECTION FROM MENU” in “DATA MONI TOR” mode for “TRANSMISSION” with CONSULT-III.
3. Read out the value of “LUSEL SOL OUT”.
Without CONSULT-III
1. Turn ignition switch ON.
2. Check voltage between TCM connector terminal and ground.
3. Turn ignition switch OFF.
4. Disconnect the TCM connector.
5. Check if there is continuity between connector terminal and ground.
OK or NG OK >> GO TO 5.
NG >> GO TO 2. 2.
CHECK LOCK-UP SELECT 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. 3.
CHECK VALVE RESISTANCE
1. Turn ignition switch OFF.
2. Disconnect CVT unit harness connector. Item name Condition Display value
LUSEL SOL OUT Selector lever in “P” and “N”
positions ON
Wait at least for 5 seconds
with the selector lever in
“R”, “D” and “L” positions OFF
Name Connector Terminal Condition Voltage
(Approx.)
Lock-up
select sole-
noid valve E31 4 - Ground Selector lever in “P” and
“N” positions Battery
voltage
Wait at least for 5 sec-
onds with the selector le-
ver in “R”, “D” and “L”
positions 0 V SCIA7955E
Solenoid valve Connector Terminal
Resistance (Ap-
prox.)
Lock-up select solenoid
valve E31 4 - Ground 6 - 19
Ω SCIA4692E

DTC P1740 LOCK-UP SELECT
SOLENOID VALVE CIRCUIT
CVT-309
< SERVICE INFORMATION >
[RE0F08B] D
E
F
G H
I
J
K L
M A
B CVT
N
O P
3. Check resistance between CVT unit harness connector terminal
and ground.
OK or NG OK >> GO TO 4.
NG >> Replace the transaxle assembly. Refer to CVT-354," Removal and Installation " .
4.
CHECK HARNESS BETWEEN TCM AND LO CK-UP SELECT SOLENOID VALVE
1. Turn ignition switch OFF.
2. Disconnect TCM connector.
3. Check continuity between TCM connector terminal and CVT unit harness connector terminal.
4. If OK, check harness for short to ground and short to power.
5. Reinstall any part removed.
OK or NG OK >> GO TO 5.
NG >> Repair open circuit or short to ground or short to power in harness or connectors. 5.
CHECK DTC
Perform CVT-306, " DTC Confirmation Procedure " .
OK or NG OK >>
INSPECTION END
NG >> GO TO 6. 6.
CHECK TCM
1. Check TCM input/output signals. Refer to CVT-228, " TCM Terminal and Reference Value " .
2. If NG, re-check TCM pin terminals for dam age or loose connection with harness connector.
OK or NG OK >>
INSPECTION END
NG >> 1. Repair or replace damaged parts.
2. Replace TCM. Refer to CVT-190, " Service After Replacing TCM and Transaxle Assembly " .
Component Inspection INFOID:0000000004305771
LOCK-UP SELECT SOLENOID VALVE 1. Turn ignition switch OFF.
2. Disconnect CVT unit harness connector.
3. Check resistance between CVT unit harness connector terminal and ground.
4. If NG, replace the transaxle assembly. Refer to CVT-354," Removal and Installation " .
Solenoid valve Connector Terminal
Resistance (Ap-
prox.)
Lock-up select solenoid valve F46 13 - Ground 6 - 19 Ω SCIA4693E
Item Connector Terminal Continuity
TCM E31 4 Yes
CVT unit harness connector F46 13 SCIA4694E
Solenoid valve Connector Terminal
Resistance (Ap-
prox.)
Lock-up select solenoid valve F46 13 - Ground 6 - 19 Ω SCIA4693E

Diagnosis Procedure " .
Diagnosis Procedure INFOID:0000000004305776OBD-II Diagnostic Trouble Code (DTC) " .
4. Turn ignition switch OFF, and wait for 10 seconds or more.
5. Start engine.
6. Confirm self-diagnostic results again. Refer to CVT-230, " CONSULT-III Function (TRANSMISSION) " .
Is the “ P1745 L/PRESS CONTROL ” displayed?
YES >> Replace TCM. Refer to
CVT-190, " Service After Replacing TCM and Transaxle Assembly " .
NO >> INSPECTION END

DTC P1777 STEP MOTOR - CIRCUIT
CVT-313
< SERVICE INFORMATION >
[RE0F08B] D
E
F
G H
I
J
K L
M A
B CVT
N
O P
Diagnosis Procedure
INFOID:00000000043057831.
CHECK INPUT SIGNALS
With CONSULT-III
1. Start engine.
2. Select “SELECTION FROM MENU” in “DATA MONI TOR” mode for “TRANSMISSION” with CONSULT-III.
3. Start vehicle and read out the value of “STM STEP”, “SMCOIL A”, “SMCOIL B”, “SMCOIL C”, and
“SMCOIL D”.
OK or NG OK >> GO TO 4.
NG >> GO TO 2. 2.
CHECK HARNESS BETWEEN TCM AND STEP MOTOR
1. Turn ignition switch OFF.
2. Disconnect CVT unit connector and TCM connector.
3. Check continuity between TCM connector terminals and CVT
unit harness connector terminals.
4. If OK, check harness for short to ground and short to power.
5. If OK, check continuity between body ground and CVT assembly.
6. 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 STEP MOTOR
Check step motor. Refer to CVT-314, " Component Inspection " .
OK or NG OK >> GO TO 4.
NG >> Repair or replace damaged parts. 4.
CHECK DTC
Perform CVT-311, " DTC Confirmation Procedure " .
OK or NG OK >>
INSPECTION END
NG >> GO TO 5.
Item name Condition Display value (Approx.)
STM STEP
During driving−
20 step - 180 step
SMCOIL A
Changes ON⇔OFF.
SMCOIL B
SMCOIL C
SMCOIL D Item Connector Terminal Continuity
TCM E31 11 Yes
CVT unit harness connector F46 6
TCM E31 12 Yes
CVT unit harness connector F46 7
TCM E31 20 Yes
CVT unit harness connector F46 8
TCM E31 21 Yes
CVT unit harness connector F46 9 SCIA4695E

CVT-314< SERVICE INFORMATION >
[RE0F08B]
DTC P1777 STEP MOTOR - CIRCUIT 5.
CHECK TCM
1. Check TCM input/output signals. Refer to CVT-228, " TCM Terminal and Reference Value " .
2. If NG, re-check TCM pin terminals for damage or loose connection with harness connector.
OK or NG OK >>
INSPECTION END
NG >> Repair or replace damaged parts.
Component Inspection INFOID:0000000004305784
STEP MOTOR
1. Turn ignition switch OFF.
2. Disconnect CVT unit harness connector.
3. Check resistance between CVT unit harness connector termi- nals and ground.
4. If NG, replace the transaxle assembly. Refer to CVT-354, " Removal and Installation " .
Name Connector Terminal
Resistance (Ap-
prox.)
Step motor F46 6 - 7
30 Ω
8 - 9
6 - Ground
15 Ω
7 - Ground
8 - Ground
9 - Ground SCIA4696E

OVERDRIVE CONTROL SWITCH
CVT-319
< SERVICE INFORMATION >
[RE0F08B] D
E
F
G H
I
J
K L
M A
B CVT
N
O P
Perform the self-diagnosis check. Refer to
CVT-230, " CONSULT-III Functi
on (TRANSMISSION) " .
Is any malfunction of the “ U1000 CAN COMM CIRCUIT ” indicated in the results?
YES >> Check CAN communication line. Refer to
CVT-238 .
NO >> GO TO 2. 2.
CHECK OVERDRIVE CO NTROL SWITCH SIGNAL
With CONSULT-III
1. Turn ignition switch ON.
2. Select “ECU INPUT SIGNALS” in “DATA MONITO R” mode for “TRANSMISSION” with CONSULT-III.
3. Read out ON/OFF switching action of the “SPORT MODE SW”.
OK or NG OK >>
INSPECTION END
NG >> GO TO 3. 3.
CHECK OVERDRIVE CONTROL SWITCH
Check overdrive control switch. Refer to CVT-320, " Component Inspection "
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts. 4.
CHECK SELF-DIAGNOSTIC RESU LTS (COMBINATION METER)
Perform self-diagnosis check. Refer to DI-10, " Self-Diagnosis Mode of Combination Meter " .
Is any malfunction detected by self-diagnostic? YES >> Check the malfunctioning system.
NO - 1 >> With intelligent key: GO TO 5.
NO - 2 >> Without intelligent key: GO TO 6. 5.
CHECK OVERDRIVE CO NTROL SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect CVT device connector and combination meter connector.
3. Check continuity between CVT device harness connector (A)
terminal and combination meter harness connector (B) terminal.
Item name Condition Display value
SPORT MODE SW While pushing overdrive
cancel switch ON
Other conditions OFF Item Connector Terminal Continuity
CVT device harness connector M38 1 Yes
Combination meter harness
connector M24 8 SCIA7949E

CVT-320< SERVICE INFORMATION >
[RE0F08B]
OVERDRIVE CONTROL SWITCH
4. Check continuity between CVT device harness connector termi- nal and ground.
5. If OK, check harness for short to ground and short to power.
6. Reinstall any part removed.
OK or NG OK >>
INSPECTION END
NG >> Repair open circuit or short to ground or short to power
in harness or connectors. 6.
CHECK OVERDRIVE CONTROL SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect CVT device connector and combination meter connector.
3. Check continuity between CVT device harness connector (A)
terminal and combination meter harness connector (B) terminal.
4. Check continuity between CVT device harness connector termi- nal and ground.
5. If OK, check harness for short to ground and short to power.
6. Reinstall any part removed.
OK or NG OK >>
INSPECTION END
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
Component Inspection INFOID:0000000004305795
OVERDRIVE CONTROL SWITCH
With Intelligent Key
Check continuity between CVT device harness connector terminals.
Without Intelligent Key Item Connector Terminal Continuity
CVT device harness connector M38 2 - ground Yes SCIA7950E
Item Connector Terminal Continuity
CVT device harness connector M38 1 Yes
Combination meter harness
connector M24 8 SCIA7951E
Item Connector Terminal Continuity
CVT device harness connector M38 2 - ground Yes SCIA7952E
Item Condition Connector Terminal Continuity
Overdrive con-
trol switch While pushing
overdrive control
switch M38 1 - 2 Yes
Other conditions No SCIA7942E