2009 NISSAN LATIO display

OK >> GO TO 5.
NG >> GO TO 2. Inspections before Trouble Diagnosis " .
OK or NG OK >> GO TO 3.
NG >> Repair or replace damaged parts. Refer to CVT-40, " Inspections before Trouble Diagnosis " .
Component Inspection " .
• Lock-up select solenoid valve. Refer to CVT-139, " 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 ,
CVT-80 .
OK or NG OK >> GO TO 5.
NG >> Repair or replace damaged parts. DTC Confirmation Procedure " .
OK or NG OK >>
INSPECTION END
NG >> GO TO 6. 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 >> 1. Repair or replace damaged parts. 2. Replace the transaxle assembly. Refer to CVT-182, " Removal and Installation " .
Item name Condition Display value
ENG SPEED SIG Eng ine runningClosely matches the ta-
chometer reading.
PRI SPEED SEN During driving (lock-up ON) Approximately matches
the engine speed.

CVT
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DTC P0745 LINE PRESSURE SOLENOID VALVE
Description INFOID:0000000004666974
• The pressure control solenoid valve A (line pressure solenoid valve) is included in the control valve assem- bly.
• The pressure control solenoid valve A (line pressure solenoid valve) regulates the oil pump discharge pres-
sure to suit the driving condition in response to a signal sent from the TCM.
CONSULT-III Reference Val ue in Data Monitor Mode INFOID:0000000004666975
Remarks: Specification data are reference values.
On Board Diagnosis Logic INFOID:0000000004666976
• This is an OBD-II self-diagnostic item.
• Diagnostic trouble code “P0745 L/PRESS SOL/CIRC” with CONSULT-III 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 Cause INFOID:0000000004666977
• Harness or connectors (Solenoid circuit is open or shorted.)
• Pressure control solenoid valve A (Line pressure solenoid valve)
DTC Confirmation Procedure INFOID:0000000004666978
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, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-III
1. Turn ignition switch ON and select “DATA MO NITOR” mode for “TRANSMISSION” with CONSULT-III.
2. Start engine and wait at least 5 seconds.
3. If DTC is detected, go to CVT-101, " Diagnosis Procedure " .
WITH GST
Follow the procedure “WITH CONSULT-III”. Item name Condition Display value (Approx.)
ISOLT2 Release your foot from the accelerator pedal. 0.8 A
Press the accelerator pedal all the way down. 0.0 A

CVT
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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. Inspections before Trouble Diagnosis " .
OK or NG OK >> GO TO 3.
NG >> Repair or replace damaged parts. Refer to CVT-40, " Inspections before Trouble Diagnosis " .
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 ,
CVT-80 .
OK or NG OK >> GO TO 5.
NG >> Repair or replace damaged parts. Wiring Diagram - CVT - POWER " .
• The TCM pin terminals for damage or loose connection with harness connector.
OK or NG OK >> GO TO 6.
NG >> Repair or replace damaged parts. DTC Confirmation Procedure " .
OK or NG OK >>
INSPECTION END
NG >> Replace the transaxle assembly or TCM. Refer to CVT-182, " Removal and Installation " .
Item name Condition Display value (Approx.)
PRI PRESS “N” position idle. 0.8 A Name Connector Terminal Condition
Voltage
(Approx.)
Transmission
fluid pressure
sensor B (Pri-
mary pres-
sure sensor) E32 41 - ground “N” position idle. 0.7 V

CVT
N
O P
OK or NG OK >> GO TO 5.
NG >> GO TO 2. Inspections before Trouble Diagnosis " .
OK or NG OK >> GO TO 3.
NG >> Repair or replace damaged parts. Refer to CVT-40, " Inspections before Trouble Diagnosis " .
Component
Inspection " .
• Pressure control solenoid valve A (Line pressure solenoid valve). Refer to CVT-102, " Component Inspec-
tion " .
OK or NG OK >> GO TO 4.
NG >> Repair or replace damaged parts.
4. CHECK TRANSMISSION FLUID PRESSURE SENSOR A (SECONDARY PRESSURE SENSOR) SYS- .
OK or NG OK >> GO TO 5.
NG >> Repair or replace damaged parts. Wiring Diagram - CVT - POWER " .
• The TCM pin terminals for damage or loose connection with harness connector.
OK or NG OK >> GO TO 6.
NG >> Repair or replace damaged parts. DTC Confirmation Procedure " .
OK or NG OK >>
INSPECTION END
NG >> Replace the transaxle assembly. Refer to CVT-182, " Removal and Installation " .
Item name Condition Display value (Approx.)
SEC PRESS “N” position idle 0.8 MPa

Diagnosis Procedure " .
WITH GST
Follow the procedure “WITH CONSULT-III”. Item name Condition Display value (Approx.)
ISOLT3 Secondary pressure low - Secondary pressure high 0.8 - 0.0 A
SOLMON3 “N” position idle 0.6 - 0.7 A
When stalled 0.4 - 0.6 A

CVT
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DTC P0840 TRANSMISSION FLUID
PRESSURE SENSOR A CIRCUIT
(SEC PRESSURE SENSOR)
Description INFOID:0000000004667002
• The transmission fluid pressure sensor A (secondary pressure sensor) is included in the control valve
assembly.
• The transmission fluid pressure sensor A (secondary pressure sensor) detects secondary pressure of CVT
and sends TCM the signal.
CONSULT-III Reference Val ue in Data Monitor Mode INFOID:0000000004667003
Remarks: Specification data are reference values.
On Board Diagnosis Logic INFOID:0000000004667004
• This is an OBD-II self-diagnostic item.
• Diagnostic trouble code “P0840 TR PRS SENS/A CIRC” with CONSULT-III is detected when TCM detects
an improper voltage drop when it receives the sensor signal.
Possible Cause INFOID:0000000004667005
• Transmission fluid pressure sensor A (Secondary pressure sensor)
• Harness or connectors (Switch circuit is open or shorted.)
DTC Confirmation Procedure INFOID:0000000004667006
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, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-III
1. Turn ignition switch ON and select “DATA MO NITOR” mode for “TRANSMISSION” with CONSULT-III.
2. Make sure that output voltage of line te mperature sensor is within the range below.
ATF TEMP SEN: 1.0 - 2.0 V
If out of range, drive the vehicle to decrease the voltage (warm up the fluid) or stop engine to
increase the voltage (c ool down the fluid)
3. Start engine and wait for at least 5 consecutive seconds.
4. If DTC is detected, go to CVT-115, " Diagnosis Procedure " .
WITH GST
Follow the procedure “WITH CONSULT-III”. Item name Condition Display value (Approx.)
SEC HYDR SEN “N” position idle 1.0 V
SEC PRESS 0.8 MPa

DTC P0840 TRANSMISSION FLUID PR
ESSURE SENSOR A CIRCUIT (SEC
PRESSURE SENSOR)
CVT-115
< SERVICE INFORMATION >
[RE0F08A] D
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G H
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K L
M A
B CVT
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Diagnosis Procedure
INFOID:00000000046670081.
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

OK >> GO TO 6.
NG >> GO TO 3. Inspections before Trouble Diagnosis " .
OK or NG OK >> GO TO 4.
NG >> Repair or replace damaged parts. Refer to CVT-40, " Inspections before Trouble Diagnosis " .
4. CHECK TRANSMISSION FLUID PRESSURE SENS OR A (SECONDARY PRESSURE SENSOR) SYS- ,
CVT-119 .
OK or NG OK >> GO TO 5.
NG >> Repair or replace damaged parts. Component Inspec-
tion " .
• Pressure control solenoid valve B (Secondary pressure solenoid valve). Refer to CVT-111, " Component
Inspection " .
• Step motor. Refer to CVT-144, " Component Inspection " .
OK or NG6 OK >> GO TO 6.
NG >> Repair or replace damaged parts. DTC Confirmation Procedure " .
OK or NG OK >>
INSPECTION END
NG >> Replace TCM or transaxle assembly. Refer to CVT-182, " Removal and Installation " .
Item name Condition Display value (Approx.)
PRI HYDR SEN “N” position idle 0.7 V
SEC HYDR SEN 1.0 V Name Connector Terminal Condition
Voltage
(Approx.)
Transmission fluid
pressure sensor B
(Primary pres-
sure sensor) E3241 - Ground
“N” position idle 0.7 V
Transmission fluid
pressure sensor A
(Secondary pres-
sure sensor) 37 - Ground 1.0 V