O2 sensor NISSAN LATIO 2010 Service Repair Manual

P1722 VEHICLE SPEEDCVT-119
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P1722 VEHICLE SPEED
DescriptionINFOID:0000000005397931
The vehicle speed signal is transmitt ed from ABS actuator and electric unit (control unit) to TCM by CAN com-
munication line.
CONSULT-III Reference Val ue in Data Monitor ModeINFOID:0000000005397932
Remarks: Specification data are reference values.
On Board Diagnosis LogicINFOID:0000000005397933
• This is not an OBD-II self-diagnostic item.
• Diagnostic trouble code “P1722” with CONSULT-III is det ected when TCM does not receive the proper vehi-
cle speed signal (input by CAN communication) from ABS actuator and electric unit (control unit).
Possible CauseINFOID:0000000005397934
• Harness or connectors
(Sensor circuit is open or shorted.)
• ABS actuator and electric unit (control unit)
DTC Confirmation ProcedureINFOID:0000000005397935
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-III
1. Turn ignition switch ON. (Do not start engine.)
2. Select “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.
3. Start engine and maintain the following conditions for at least 5 consecutive seconds. ACC PEDAL OPEN: 1.0/8 or less
VEHICLE SPEED SE: 30 km/h (17 MPH) or more
4. If DTC is detected, go to CVT-119, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000005397936
1.CHECK CAN COMMUNICATION LINE
Perform the self-diagnosis check. Refer to CVT-48, "
CONSULT-III Function (TRANSMISSION)".
Is any malfunction of the
“U1000” indicated?
YES >> Check CAN communication line. Refer to CVT-56.
NO >> GO TO 2.
2.CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
Perform ABS actuator and electric unit (cont rol unit) self-diagnosis check. Refer to BRC-20, "
CONSULT-III
Function (ABS)".
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.
3.CHECK INPUT SIGNALS
Item name Condition Display value
ESTM VSP SIG During driving Approximately matches the speedometer reading.
VEHICLE SPEED
Revision: January 20102010 Versa

P1723 SPEED SENSORCVT-121
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P1723 SPEED SENSOR
DescriptionINFOID:0000000005397937
• The primary speed sensor is included in the control valve assembly.
• The secondary speed sensor detects the revolution of the idler gear and generates a pulse signal. The pulse signal is sent to the TCM, which converts it into vehicle speed.
• The primary speed sensor detects the primary pul ley revolution speed and sends a signal to the TCM.
On Board Diagnosis LogicINFOID:0000000005397938
• This is not an OBD-II self-diagnostic item.
• Diagnostic trouble code “P1723” with CONSULT-III is det ected when there is a great difference between the
vehicle speed signal and the secondary speed sensor signal.
CAUTION:
One of the “P0720”, the “P0715” or the “P0725“ is displayed with the DTC at the same time.
Possible CauseINFOID:0000000005397939
• Harness or connectors
(Sensor circuit is open or shorted.)
• Secondary speed sensor
• Primary speed sensor
• Engine speed signal system
DTC Confirmation ProcedureINFOID:0000000005397940
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-III
1. Turn ignition switch ON and select “DATA MO NITOR” mode for “TRANSMISSION” with CONSULT-III.
2. Start engine and maintain the following conditions for at least 5 consecutive seconds.
VEHICLE SPEED SE: 10 km/h (6 MPH) or more
ACC PEDAL OPEN: More than 1.0/8
RANGE: “D” position
ENG SPEED: 450 rpm or more
Driving location: Driving the vehic le uphill (increased engine load) will help maintain the driving
conditions required for this test.
3. If DTC is detected, go to CVT-121, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000005397941
1.CHECK STEP MOTOR FUNCTION
Perform the self-diagnosis check. Refer to CVT-48, "
CONSULT-III Function (TRANSMISSION)".
Is a malfunction in the step motor function indicated in the results?
YES >> Repair or replace damaged parts. (C heck the step motor function. Refer to CVT-133.)
NO >> GO TO 2.
2.CHECK SECONDARY SPEED SENSOR SYSTEM AND PRIMARY SPEED SENSOR SYSTEM
Check secondary speed sensor system and primary speed sensor system. Refer to CVT-76
, CVT-72.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.
3.CHECK ENGINE SPEED SIGNAL SYSTEM
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CVT-122
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P1723 SPEED SENSOR
Check engine speed signal system. Refer to
CVT-81.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts. Refer to EC-1019, "
Component Description".
4.DETECT MALFUNCTIONING ITEM
Check the following:
• Power supply and ground circuit for TCM. Refer to CVT-113
.
• 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.
5.CHECK DTC
Perform CVT-121, "
DTC Confirmation Procedure".
OK or NG
OK >> INSPECTION END
NG >> Replace TCM or transaxle assembly. Refer to CVT-159, "
Removal and Installation", CVT-173,
"Removal and Installation".
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P1726 THROTTLE CONTROL SIGNALCVT-123
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P1726 THROTTLE CONTROL SIGNAL
DescriptionINFOID:0000000005397942
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 LogicINFOID:0000000005397943
• This is not an OBD-II self-diagnostic item.
• Diagnostic trouble code “P1726” with CONS ULT-III is detected when the electronically controlled throttle for
ECM is malfunctioning.
Possible CauseINFOID:0000000005397944
Harness or connectors
(Sensor circuit is open or shorted.)
DTC Confirmation ProcedureINFOID:0000000005397945
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-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-123, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000005397946
1.CHECK DTC WITH ECM
With CONSULT-III
1. Turn ignition switch ON. (Do not start engine.)
2. Select “SELF-DIAG RESULTS” mode for “ENGINE” with CONSULT-III. Refer to EC-612, "
CONSULT-III
Function (ENGINE)".
OK or NG
OK >> GO TO 2.
NG >> Check the DTC Detected Item. Refer to EC-612, "
CONSULT-III Function (ENGINE)".
• If CAN communication line is detected, go to CVT-56
.
2.CHECK DTC
Perform CVT-123, "
DTC Confirmation Procedure".
OK or NG
OK >> INSPECTION END
NG >> GO TO 3.
3.DETECT MALFUNCTIONING ITEM
Check the following:
• The TCM pin terminals for damage or loose connection with harness connector.
OK or NG
OK >> Replace TCM. Refer to CVT-159, "Removal and Installation".
NG >> Repair or replace damaged parts.
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CVT-128
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P1745 LINE PRESSURE CONTROL
P1745 LINE PRESSURE CONTROL
DescriptionINFOID:0000000005397955
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.
On Board Diagn
osis LogicINFOID:0000000005397956
• This is not an OBD-II self-diagnostic item.
• Diagnostic trouble code “P1745” with CONSULT-III is detected when TCM detects the unexpected line pres-
sure.
Possible CauseINFOID:0000000005397957
TCM
DTC Confirmation ProcedureINFOID:0000000005397958
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 RESULTS” and then perform the following procedure to con-
firm the malfunction is eliminated.
WITH CONSULT-III
1. Turn ignition switch ON and select “DATA MONI TOR” mode for “TRANSMISSION” with CONSULT-III.
2. Make sure that output voltage of CVT fluid temperature 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 (cool down the fluid)
3. If DTC is detected, go to CVT-128, "
Diagnosis Procedure" .
Diagnosis ProcedureINFOID:0000000005397959
1.CHECK DTC
1. Turn ignition switch ON. (Do not start engine.)
2. Select “SELF-DIAG RESULTS” mode fo r “TRANSMISSION” with CONSULT-III.
3. Erase self-diagnostic results. Refer to CVT-27, "
OBD-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-48, "
CONSULT-III Function (TRANSMISSION)" .
Is the
“P1745” displayed?
YES >> Replace TCM. Refer to CVT-159, "Removal and Installation" .
NO >> INSPECTION END
Revision: January 20102010 Versa

P1778 STEP MOTORCVT-133
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P1778 STEP MOTOR
DescriptionINFOID:0000000005397968
• The step motor is included in the control valve assembly.
• The step motor's 4 aspects of ON/OFF change according to the signal from TCM. As a result, the flow of line pressure to primary pulley is changed and pulley ratio is controlled.
• This diagnosis item is detected when electrical system is OK, but mechanical system is NG.
• This diagnosis item is detected when the state of the changing the speed mechanism in unit does not oper- ate normally.
CONSULT-III Reference Val ue in Data Monitor ModeINFOID:0000000005397969
Remarks: Specification data are reference values.
On Board Diagnosis LogicINFOID:0000000005397970
• This is an OBD-II self-diagnostic item.
• Diagnostic trouble code “P1778” with CONSULT-III is detected under the following conditions.
- When not changing the pulley ratio according to the instruction of TCM.
Possible CauseINFOID:0000000005397971
Step motor
DTC Confirmation ProcedureINFOID:0000000005397972
CAUTION:
• Always drive vehicle at a safe speed.
• Before starting “DTC Confirmation Procedure”, confirm “Hi” or “Mid” or “Low” fixation by “PRI
SPEED” and “VEHICLE SPEED” on “DATA MONITOR MODE”.
• If hi-geared fixation occurred, go to CVT-134, "
Diagnosis Procedure".
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-III
1. Turn ignition switch ON and select “DATA MO NITOR” mode for “TRANSMISSION” with CONSULT-III.
2. Make sure that output voltage of CVT fluid temperature 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. Select “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.
4. Start engine and maintain the following conditions for at least 30 consecutive seconds. TEST START FROM 0 km/h (0 MPH)
CONSTANT ACCELERATION: Keep 30 sec or more
VEHICLE SPEED: 10 km/h (6 MPH) or more
ACC PEDAL OPEN: More than 1.0/8
RANGE: “D” position
ENG SPEED: 450 rpm or more
5. If DTC is detected, go to CVT-134, "
Diagnosis Procedure".
WITH GST
Follow the procedure “WITH CONSULT-III”.
Item name Condition Display value (Approx.)
STM STEP During driving(−
20) - (+180) step
GEAR RATIO 2.56 - 0.43
Revision: January 20102010 Versa

PRIMARY SPEED SENSORCVT-169
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PRIMARY SPEED SENSOR
Exploded ViewINFOID:0000000005398005
Removal and InstallationINFOID:0000000005398006
REMOVAL
1. Disconnect the battery cabl e from the negative terminal.
2. Remove air duct (inlet) and air cleaner case. Refer to EM-135, "
Component".
3. Disconnect primary speed sensor connector.
4. Remove primary speed sensor.
5. Remove O-ring from primary speed sensor.
INSTALLATION
Note the following, and install in the reverse order of removal.
CAUTION:
• Never reuse O-ring.
• Apply CVT fluid to O-ring.
InspectionINFOID:0000000005398007
INSPECTION AFTER INSTALLATION
Check for CVT fluid leakage and check CVT fluid level. Refer to CVT-14, "Checking CVT Fluid".
1. Primary speed sensor2. O-ring3. Transaxle assembly
: Apply CVT Fluid NS-2.
JSDIA0750GB
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CVT-170
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SECONDARY SPEED SENSOR
SECONDARY SPEED SENSOR
Exploded ViewINFOID:0000000005398008
Removal and InstallationINFOID:0000000005398009
REMOVAL
1. Disconnect the battery cable from the negative terminal.
2. Remove air duct (inlet) and air cleaner case. Refer to
EM-135, "
Component".
3. Disconnect secondary speed sensor connector.
4. Remove secondary speed sensor.
5. Remove O-ring from secondary speed sensor.
INSTALLATION
Note the following, and install in the reverse order of removal.
CAUTION:
• Never reuse O-ring.
• Apply CVT fluid to O-ring.
InspectionINFOID:0000000005398010
INSPECTION AFTER INSTALLATION
Check for CVT fluid leakage and check CVT fluid level. Refer to CVT-14, "Checking CVT Fluid".
1. Secondary speed sensor2. O-ring3. Transaxle assembly
: Apply CVT Fluid NS-2.
JSDIA0751GB
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CVT-174
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TRANSAXLE ASSEMBLY
2. Disconnect the primary speed sensor (A) and the secondary
speed sensor connector (B) and CVT unit connector (C). Refer
to CVT-9, "
Removal and Installation Procedure for CVT Unit
Connector".
3. Remove the harness from the transaxle.
4. Remove the four drive plate to torque converter nuts. NOTE:
Rotate the crankshaft clockwise as viewed from front of engine
for access to drive plate to torque converter nuts.
5. Put matching marks on the drive plate and torque converter alignment stud. CAUTION:
For matching marks, use paint. Never dama ge the drive plate or torque converter.
6. Remove the transaxle to engine and engine to transaxle bolts.
7. Separate the transaxle from the engine.
8. If necessary, remove the following from the transaxle: • CVT fluid charging pipe
• Engine mounting bracket (LH)
• Fluid cooler tubes
• Air breather hose
• Any necessary brackets
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
• When replacing an engine or transmission you must make sure any dowels are installed correctly
during re-assembly.
• Improper alignment caused by missing dowels m ay cause vibration, oil leaks or breakage of drive
train components.
• Do not reuse O-rings and copper washers.
• When turning crankshaft, turn it clockwi se as viewed from the front of the engine.
• When tightening the nuts for the torque converte r while securing the crankshaft pulley bolt, be sure
to confirm the tightening torque of the crankshaft pulley bolt. Refer to EM-156
.
• After converter is installed to drive plate, ro tate crankshaft several turns to check that transaxle
rotates freely without binding.
AWDIA0661GB
WCIA0616E
Revision: January 20102010 Versa

SERVICE DATA AND SPECIFICATIONS (SDS)CVT-177
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Solenoid ValvesINFOID:0000000005398018
CVT Fluid Temperature SensorINFOID:0000000005398019
Primary Speed SensorINFOID:0000000005398020
Secondary Speed SensorINFOID:0000000005398021
Removal and InstallationINFOID:0000000005398022
Name Resistance (Approx.) Terminal
secondary pressure solenoid valve 3 - 9 Ω3
Line pressure solenoid valve 2
Torque converter clutch solenoid valve 12
Lock-up select solenoid valve 6 - 19Ω 13
NameCondition CONSULT-III “DATA MONI TOR” (Approx.) Resistance (Approx.)
AT F T E M P S E N 20
°C (68 °F) 2.0 V 6.5 kΩ
80 °C (176 °F) 1.0 V 0.9 kΩ
Name ConditionData (Approx.)
Primary speed sensor When driving [“L” position, 20 km/h (12 MPH)]. 1250 Hz
NameConditionData (Approx.)
Secondary speed sensor When driving [“D” position, 20 km/h (12 MPH)]. 570 Hz
Distance between end of converter housing and torque converter 14.4 mm (0.57 in)
Revision: January 20102010 Versa