2009 NISSAN LATIO service

CVT-284< SERVICE INFORMATION >
[RE0F08B]
DTC P0778 PRESSURE CONTROL SOLENO
ID B ELECTRICAL (SEC PRES-
SURE SOLENOID VALVE)
Diagnosis Procedure INFOID:00000000043057081.
CHECK INPUT SIGNAL
With CONSULT-III
1. Start engine.
2. Select “MAIN SIGNALS” in “DATA MONITO R” mode for “TRANSMISSION” with CONSULT-III.
3. Read out the value of “ISOLT3”.
Without CONSULT-III
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.
2. CHECK PRESSURE CONTROL SOLE NOID VALVE B (SECONDARY PRESSURE 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 (Approx.)
ISOLT3 Secondary pressure low -
Secondary pressure high 0.8 - 0.0 AName Connector Terminal Condition
Voltage
(Approx.)
Pressure
control so-
lenoid
valve B
(Second-
ary pres-
sure
solenoid
valve) E31 2 - ground Release your foot from
the accelerator pedal. 5.0 - 7.0 V
Press the accelerator
pedal all the way down. 3.0 - 4.0 V SCIA4506E
Solenoid valve Connector Terminal
Resistance (Ap-
prox.)
Pressure control solenoid
valve B (Secondary pres-
sure solenoid valve) E31 2 - Ground 3 - 9
Ω SCIA4507E

DTC P0778 PRESSURE CONTROL SOLE
NOID B ELECTRICAL (SEC PRES-
SURE SOLENOID VALVE)
CVT-285
< 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 >> Repair or replace damaged parts.
4. CHECK HARNESS BETWEEN TCM AND PRESSURE CONTROL SOLENOID VALVE B (SECONDARYPRESSURE SOLENOID VALVE)
1. Turn ignition switch OFF.
2. Disconnect TCM connector and CVT unit harness 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 or replace damaged parts. 5.
CHECK DTC
Perform CVT-282, " 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 the transaxle assembly. Refer to CVT-354, " Removal and Installation " .
Component Inspection INFOID:0000000004305709
PRESSURE CONTROL SOLENOID VALVE B (S ECONDARY PRESSURE SOLENOID VALVE)
1. Turn ignition switch OFF.
2. Disconnect CVT unit harness connector. Solenoid valve Connector Terminal
Resistance (Ap-
prox.)
Pressure control solenoid
valve B (Secondary pres-
sure solenoid valve) F46 3 - Ground 3 - 9
Ω SCIA4688E
Item Connector Terminal Continuity
TCM connector E31 2 Yes
CVT unit harness connec-
tor F46 3 SCIA4689E

CVT-286< SERVICE INFORMATION >
[RE0F08B]
DTC P0778 PRESSURE CONTROL SOLENO
ID B ELECTRICAL (SEC PRES-
SURE SOLENOID VALVE)
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.)
Pressure control sole-
noid valve B (Secondary
pressure solenoid valve) F46 3 - Ground 3 - 9
Ω SCIA4688E

DTC P0840 TRANSMISSION FLUID PR
ESSURE SENSOR A CIRCUIT (SEC
PRESSURE SENSOR)
CVT-289
< SERVICE INFORMATION >
[RE0F08B] D
E
F
G H
I
J
K L
M A
B CVT
N
O P
Diagnosis Procedure
INFOID:00000000043057161.
CHECK INPUT SIGNAL
With CONSULT-III
1. Start engine.
2. Select “ECU INPUT SIGNALS” in “DATA MONITO R” mode for “TRANSMISSION” with CONSULT-III.
3. Start vehicle and read out the value of “SEC HYDR SEN”.
Without CONSULT-III
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 SENSOR POWER AND SENSOR GROUND
1. Turn ignition switch ON. (Do not start engine)
2. Check voltage between TCM connector terminals.
OK or NG OK >> GO TO 4.
NG >> GO TO 3.
3. CHECK HARNESS BETWEEN TCM AND CVT UNI T HARNESS CONNECTOR (SENSOR POWER ANDSENSOR GROUND)
1. Turn ignition switch OFF.
2. Disconnect TCM connector and CVT unit harness 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. Reinstall any part removed.
OK or NG Item name Condition Display value (Approx.)
SEC HYDR SEN “N” position idle 1.0 V Name Connector Terminal Condition
Voltage
(Approx.)
Transmission
fluid pressure
sensor A
(Secondary
pressure sen-
sor) E32 37 - Ground “N” position idle 1.0 V SCIA4508E
Item Connector Terminal
Data (Ap-
prox.)
TCM connector E32 46 - 42 5.0 V SCIA2367E
Item Connector Terminal Continuity
TCM E32 42 Yes
CVT unit harness connector F46 19
TCM E32 46 Yes
CVT unit harness connector F46 20 SCIA4681E

CVT-290< SERVICE INFORMATION >
[RE0F08B]
DTC P0840 TRANSMISSION FLUID PR
ESSURE SENSOR A CIRCUIT (SEC
PRESSURE SENSOR)
OK >> Replace TCM. Refer to CVT-190, " Service After Replacing TCM and Transaxle Assembly " .
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
4. CHECK HARNESS BETWEEN TCM AND TRANSMISSI ON FLUID PRESSURE SENSOR A (SECOND-ARY PRESSURE SENSOR)
1. Turn ignition switch OFF.
2. Disconnect TCM connector and CVT unit harness 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-287, " 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 damage or loose connection with harness connector.
OK or NG OK >> Replace the transaxle assembly. Refer to
CVT-354, " Removal and Installation " .
NG >> Repair or replace damaged parts. Item Connector Terminal Continuity
TCM E32 37 Yes
CVT unit harness connector F46 23 SCIA4690E

CVT-298< SERVICE INFORMATION >
[RE0F08B]
DTC P1701 TRANSMISSION CONT
ROL MODULE (POWER SUPPLY)
• 10 A fuse (No.49, located in the IPDM E/R)
• 20 A fuse (No.53, located in the IPDM E/R)
• Ignition switch. Refer to PG-3 .
OK or NG OK >> GO TO 5.
NG >> Repair or replace damaged parts. 5.
CHECK TCM GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect TCM connector.
3. Check continuity between TCM connector terminals and ground.
OK or NG OK >> GO TO 6.
NG >> Repair open circuit or short to ground or short to power in harness or connectors. 6.
CHECK DTC
Perform CVT-295, " DTC Confirmation Procedure " .
OK or NG OK >>
INSPECTION END
NG >> GO TO 7. 7.
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. Name Connector Terminal Continuity
Ground E32 25
Yes
48 SCIA2671E

OK >> GO TO 3.
NG >> Repair or replace damaged parts. .
OK or NG OK >> GO TO 4.
NG >> Repair or replace damaged parts. Refer to EC-1518, " Component Description " .
.
• The TCM pin terminals for damage or loose connection with harness connector.
OK or NG OK >> GO TO 5.
NG >> Repair or replace damaged parts. DTC Confirmation Procedure " .
OK or NG OK >>
INSPECTION END
NG >> Replace TCM or transaxle assembly. Refer to CVT-190, " Service After Replacing TCM and Tran-
saxle Assembly " ,
CVT-354, " Removal and Installation " .

CVT
N
O P
DTC P1726 ELECTRIC TH
ROTTLE CONTROL SYSTEM
Description INFOID:0000000004305759
Electric throttle control actuator consists of throttle control motor, accelerator pedal position sensor, throttle
position sensor etc. The actuator sends a signal to the ECM, and ECM sends the signal to TCM with CAN
communication.
On Board Diagnosis Logic INFOID:0000000004305760
• This is not an OBD-II self-diagnostic item.
• Diagnostic trouble code “P1726 ELEC TH CONTROL” wit h CONSULT-III is detected when the electronically
controlled throttle for ECM is malfunctioning.
Possible Cause INFOID:0000000004305761
Harness or connectors
(Sensor circuit is open or shorted.)
DTC Confirmation Procedure INFOID:0000000004305762
NOTE:
If “DTC Confirmation Procedure” has been previously performed, alw ays turn ignition switch OFF and
wait at least 10 seconds before performing the next test.
After the repair, touch “ERASE” on “SELF-DIAG RESU LTS” and then perform the following procedure to con-
firm the malfunction is eliminated.
WITH CONSULT-III
1. Turn ignition switch ON. (Do not start engine.)
2. Select “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.
3. Start engine and let it idle for 5 second.
4. If DTC is detected, go to CVT-305, " Diagnosis Procedure " .
Diagnosis Procedure INFOID:0000000004305763 CONSULT-III
Function (ENGINE) " .
OK or NG OK >> GO TO 2.
NG >> Check the DTC Detected Item. Refer to EC-1116, " CONSULT-III Function (ENGINE) " .
• If CAN communication line is detected, go to CVT-238 .
DTC Confirmation Procedure " .
OK or NG OK >>
INSPECTION END
NG >> GO TO 3. OK >> Replace TCM. Refer to
CVT-190, " Service After Replacing TCM and Transaxle Assembly " .
NG >> Repair or replace damaged parts.