NISSAN LATIO 2010 Service Repair Manual

CVT-108
< SERVICE INFORMATION >[RE0F08B]
P0840 TRANSMISSION FLUID PRESSURE SEN/SW A
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK HARNESS BETWEEN TCM A
ND SECONDARY 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-105, "
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-46, "
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-173, "Removal and Installation" .
NG >> Repair or replace damaged parts.
Item Connector Terminal Continuity
TCM E3237
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CVT unit harness connector F46 23
SCIA4690E
Revision: January 20102010 Versa

P0841 TRANSMISSION FLUID PRESSURE SEN/SW ACVT-109
< SERVICE INFORMATION > [RE0F08B]
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P0841 TRANSMISSION FLUI D PRESSURE SEN/SW A
DescriptionINFOID:0000000005397907
Using the engine load (throttle position), the primary pulley revolution speed, and the secondary pulley revolu-
tion speed as input signal, TCM changes the operating pr essure of the primary pulley and the secondary pul-
ley and changes the groove width of the pulley to control the gear ratio.
CONSULT-III Reference Val ue in Data Monitor ModeINFOID:0000000005397908
Remarks: Specification data are reference values.
On Board Diagnosis LogicINFOID:0000000005397909
• This is not an OBD-II self-diagnostic item.
• Diagnostic trouble code “P0841” with CONSULT-III is detected when secondary fluid pressure is too high
compared with the commanded value while driving.
Possible CauseINFOID:0000000005397910
• Secondary pressure sensor
• Harness or connectors (Sensor circuit is open or shorted.)
DTC Confirmation ProcedureINFOID:0000000005397911
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, 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 maintain the following conditions for at least 12 consecutive seconds. VEHICLE SPEED: 40 km/h (25 MPH) More than
RANGE: “D” position
3. If DTC is detected, go to CVT-109, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000005397912
1.CHECK CAN COMMUNICATION LINE
Perform the self-diagnosis. 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 INPUT SIGNALS
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” and “PRI HYDR SEN”.
Item nameCondition Display value (Approx.)
PRI HYDR SEN “N” position idle 0.7 V
SEC HYDR SEN 1.0 V
Revision: January 20102010 Versa

CVT-110
< SERVICE INFORMATION >[RE0F08B]
P0841 TRANSMISSION FLUID PRESSURE SEN/SW A
Without CONSULT-III
1. Start engine.
2. Check voltage between TCM connector terminals and ground.
OK or NG
OK >> GO TO 6.
NG >> GO TO 3.
3.CHECK LINE PRESSURE
Perform line pressure test. Refer to CVT-37, "
Inspections before Trouble Diagnosis".
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts. Refer to CVT-37, "
Inspections before Trouble Diagnosis".
4.CHECK SECONDARY PRESSURE SENSOR SYSTEM
Check secondary pressure sensor system. Refer to CVT-105
.
OK or NG
OK >> GO TO 5.
NG >> Repair or replace damaged parts.
5.DETECT MALFUNCTIONING ITEM
Check the following:
• Line pressure solenoid valve. Refer to CVT-94, "
Component Inspection".
• Step motor. Refer to CVT-132, "
Component Inspection".
OK or NG6
OK >> GO TO 6.
NG >> Repair or replace damaged parts.
6.CHECK DTC
Perform CVT-109, "
DTC Confirmation Procedure".
OK or NG
OK >> INSPECTION END
NG >> Replace TCM or transaxle assembly. Refer to CVT-173, "
Removal and Installation".
Item name ConditionDisplay value (Approx.)
PRI HYDR SEN “N” position idle 0.7 V
SEC HYDR SEN 1.0 V
Name Connector Terminal Condition Voltage
(Approx.)
Secondary pres-
sure sensor E32 37 - Ground “N” position idle 1.0 V
AWDIA0650GB
Revision: January 20102010 Versa

P0868 TRANSMISSION FLUID PRESSURECVT-111
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P0868 TRANSMISSION FLUID PRESSURE
DescriptionINFOID:0000000005397913
• The secondary pressure solenoid valve is included in the control valve assembly.
• The secondary pressure solenoid valve regulates the secondary pressure to suit the driving condition in
response to a signal sent from the TCM.
CONSULT-III Reference Val ue in Data Monitor ModeINFOID:0000000005397914
Remarks: Specification data are reference values.
On Board Diagnosis LogicINFOID:0000000005397915
• This is not an OBD-II self-diagnostic item.
• Diagnostic trouble code “P0868” with CONSULT-III is det ected when secondary fluid pressure is too low
compared with the commanded value while driving.
Possible CauseINFOID:0000000005397916
• Harness or connectors (Solenoid circuit is open or shorted.)
• Secondary pressure solenoid valve system
• Secondary pressure sensor
• Line pressure control system
DTC Confirmation ProcedureINFOID:0000000005397917
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, 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 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. Start engine and maintain the following conditions for at least 10 consecutive seconds. VEHICLE SPEED (accelerate slowly): 0 → 50 km/h (31 MPH)
ACC PEDAL OPEN: 0.5/8 - 1.0/8
RANGE: “D” position
4. If DTC is detected, go to CVT-111, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000005397918
1.CHECK INPUT SIGNAL
With CONSULT-III
1. Start engine.
2. Select “MAIN SIGNALS” in “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.
3. Start vehicle and read out the value of “SEC PRESS”.
OK or NG
Item name Condition Display value (Approx.)
SEC PRESS “N” position idle 0.8 MPa
Item nameConditionDisplay value (Approx.)
SEC PRESS “N” position idle0.8 MPa
Revision: January 20102010 Versa

CVT-112
< SERVICE INFORMATION >[RE0F08B]
P0868 TRANSMISSION FLUID PRESSURE
OK >> GO TO 5.
NG >> GO TO 2.
2.CHECK LINE PRESSURE
Perform line pressure test. Refer to CVT-37, "
Inspections before Trouble Diagnosis".
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts. Refer to CVT-37, "
Inspections before Trouble Diagnosis".
3.DETECT MALFUNCTIONING ITEM
Check the following:
• Secondary pressure solenoid valve. Refer to CVT-103, "
Component Inspection".
• Line pressure solenoid valve. Refer to CVT-94, "
Component Inspection".
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts.
4.CHECK SECONDARY PRESSURE SENSOR SYSTEM
Check secondary pressure sensor system. Refer to CVT-105
.
OK or NG
OK >> GO TO 5.
NG >> Repair or replace damaged parts.
5.DETECT MALFUNCTIONING ITEM
Check the following:
• Power supply and ground circuit for TCM. Refer to CVT-114, "
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.
6.CHECK DTC
Perform CVT-111, "
DTC Confirmation Procedure".
OK or NG
OK >> INSPECTION END
NG >> Replace the transaxle assembly. Refer to CVT-173, "
Removal and Installation".
Revision: January 20102010 Versa

P1701 TCMCVT-113
< SERVICE INFORMATION > [RE0F08B]
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P1701 TCM
DescriptionINFOID:0000000005397919
When the power supply to the TCM is cut OFF, for exam ple because the battery is removed, and the self-diag-
nosis memory function stop s, malfunction is detected.
NOTE:
Since “P1701” will be indicated when replacing TCM, perform diagnosis after erasing “SELF-DIAG
RESULTS”
On Board Diagnosis LogicINFOID:0000000005397920
• This is not an OBD-II self-diagnostic item.
• Diagnostic trouble code “P1701” with CONSULT-III is detected when TCM does not receive the voltage sig- nal from the battery power supply.
• This is not a malfunction message. (Whenever shutti ng OFF a power supply to the TCM, this message
appears on the screen.)
Possible CauseINFOID:0000000005397921
Harness or connectors
(Battery or ignition switch and TCM circuit is open or shorted.)
DTC Confirmation ProcedureINFOID:0000000005397922
NOTE:
If “DTC Confirmation Procedure” has been previously conducted, always turn ignition switch OFF and
wait at least 10 seconds before conducting the next test.
After the repair, perform the following procedure to confirm 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. Wait for at least 2 consecutive seconds.
4. If DTC is detected, go to CVT-115, "
Diagnosis Procedure" .
Revision: January 20102010 Versa

CVT-114
< SERVICE INFORMATION >[RE0F08B]
P1701 TCM
Wiring Diagram - CVT - POWER
INFOID:0000000005397923
TCM TERMINALS AND REFERENCE VALUES
Refer to CVT-46, "TCM Terminal and Reference Value" .
AADWA0023GB
Revision: January 20102010 Versa

P1701 TCMCVT-115
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Diagnosis ProcedureINFOID:0000000005397924
1.CHECK DTC
1. Turn ignition switch ON. (Do not start engine.)
2. Select “SELF-DIAG RESULTS” mode for “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 5 seconds or more.
5. Start engine.
6. Confirm self-diagnostic results again. Refer to CVT-48, "
CONSULT-III Function (TRANSMISSION)" .
Is the
“P1701” displayed?
YES >> GO TO 2.
NO >> INSPECTION END
2.CHECK TCM POWER SOURCE, STEP 1
1. Turn ignition switch OFF.
2. Check voltage between TCM connector terminal and ground.
OK or NG
OK >> GO TO 3.
NG >> GO TO 4.
3.CHECK TCM POWER SOURCE, STEP 2
1. Turn ignition switch ON. (Do not start engine.)
2. Check voltage between TCM connector terminals and ground.
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.
4.DETECT MALFUNCTIONING ITEM
Check the following.
• Harness for short or open between battery and TCM connector terminal 28
• Harness for short or open between ignition switch and TCM connector terminal 10, 19
Name Connector Terminal Condition Voltage
(Approx.)
Power supply
(memory back-
up) E32 28, 30 - Ground Always
Battery
voltage
AWDIA0651GB
Name Connector Terminal Condition Voltage
(Approx.)
Power supply E3110 - Ground
Battery
voltage
0 V
Power supply 19 - Ground Battery
voltage
0 V
Power supply
(memory back-
up) E32 28, 30 - Ground Always
Battery
voltage
AWDIA0652GB
Revision: January 20102010 Versa

CVT-116
< SERVICE INFORMATION >[RE0F08B]
P1701 TCM
• 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-4
.
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-113, "
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-46, "
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 E3225
Ye s
48
SCIA2671E
Revision: January 20102010 Versa

P1705 TP SENSORCVT-117
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P1705 TP SENSOR
DescriptionINFOID:0000000005397925
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.
CONSULT-III Reference Val ue in Data Monitor ModeINFOID:0000000005397926
Remarks: Specification data are reference values.
On Board Diagnosis LogicINFOID:0000000005397927
• This is not an OBD-II self-diagnostic item.
• Diagnostic trouble code “P1705” with CONSULT-III is detected when TCM does not receive the proper
accelerator pedal position signals (input by CAN communication) from ECM.
Possible CauseINFOID:0000000005397928
•ECM
• Harness or connectors(CAN communication line is open or shorted.)
DTC Confirmation ProcedureINFOID:0000000005397929
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-III
1. Turn ignition switch ON. (Do not start engine.)
2. Select “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.
3. Depress accelerator pedal fully and release it, then wait for 5 seconds.
4. If DTC is detected, go to CVT-117, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000005397930
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 the CAN communication line. Refer to CVT-56.
NO >> GO TO 2.
2.CHECK INPUT SIGNAL
With CONSULT-III
1. Turn ignition switch ON. (Do not start engine.)
2. Select “ECU INPUT SIGNALS” in “DATA MONITO R” mode for “TRANSMISSION” with CONSULT-III.
3. Read out the value of “ACC PEDAL OPEN”.
OK or NG
Item name Condition Display value (Approx.)
ACC PEDAL OPEN Released accelerator pedal - Fully depressed accelerator pedal 0.0/8 - 8.0/8
Item name ConditionDisplay value (Approx.)
ACC PEDAL OPEN Release accelerator ped-
al.↓
Fully depressed acceler- ator pedal 0.0/8
↓
8.0/8
Revision: January 20102010 Versa