2008 NISSAN TIIDA Engine

DTC P1722 ESTM VEHICLE SPEED SIGNAL
CVT-127
< SERVICE INFORMATION >
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DTC P1722 ESTM VEHICLE SPEED SIGNAL
DescriptionINFOID:0000000001703611
The vehicle speed signal is transmitted from ABS actuator and electric unit (control unit) to TCM by CAN com-
munication line.
CONSULT-III Reference Value in Data Monitor ModeINFOID:0000000001703612
Remarks: Specification data are reference values.
On Board Diagnosis LogicINFOID:0000000001703613
• This is not an OBD-II self-diagnostic item.
• Diagnostic trouble code “P1722 ESTM VEH SPD SIG” with CONSULT-III is detected when TCM does not
receive the proper vehicle speed signal (input by CAN communication) from ABS actuator and electric unit
(control unit).
Possible CauseINFOID:0000000001703614
• Harness or connectors
(Sensor circuit is open or shorted.)
• ABS actuator and electric unit (control unit)
DTC Confirmation ProcedureINFOID:0000000001703615
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-127, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000001703616
1.CHECK CAN COMMUNICATION LINE
Perform the self-diagnosis check. Refer to CVT-47, "
CONSULT-III Function (TRANSMISSION)".
Is any malfunction of the
“U1000 CAN COMM CIRCUIT” 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 (control unit) self-diagnosis check. Refer to BRC-18, "
CONSULT-III
Function (ABS)".
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.
Item name Condition Display value
ESTM VSP SIG
During driving Approximately matches the speedometer reading.
VEHICLE SPEED

CVT-128
< SERVICE INFORMATION >
DTC P1722 ESTM VEHICLE SPEED SIGNAL
3.CHECK INPUT SIGNALS
With CONSULT-III
1. Start engine.
2. Select “SELECTION FROM MENU” in “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.
3. Drive vehicle and read out the value of “VEHICLE SPEED” and “ESTM VSP SIG”.
4. Check if there is a great difference between the two values.
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.
4.CHECK TCM
Check TCM input/output signals. Refer to CVT-45, "
TCM Terminal and Reference Value".
OK or NG
OK >> GO TO 5.
NG >> Repair or replace damaged parts.
5.CHECK DTC
Perform CVT-127, "
DTC Confirmation Procedure".
OK or NG
OK >>INSPECTION END
NG >> GO TO 2.
Item name Condition Display value
ESTM VSP SIG
During drivingApproximately matches
the speedometer reading.
VEHICLE SPEED

DTC P1723 CVT SPEED SENSOR FUNCTION
CVT-129
< SERVICE INFORMATION >
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DTC P1723 CVT SPEED SENSOR FUNCTION
DescriptionINFOID:0000000001703617
• The input speed sensor (primary speed sensor) is included in the control valve assembly.
• The vehicle speed sensor CVT [output speed sensor (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 input speed sensor (primary speed sensor) detects the primary pulley revolution speed and sends a sig-
nal to the TCM.
On Board Diagnosis LogicINFOID:0000000001703618
• This is not an OBD-II self-diagnostic item.
• Diagnostic trouble code “P1723 CVT SPD SEN/FNCTN” with CONSULT-III is detected when there is a great
difference between the vehicle speed signal and the secondary speed sensor signal.
CAUTION:
One of the “P0720 VEH SPD SEN/CIR AT”, the “P0715 INPUT SPD SEN/CIRC” or the “P0725 ENGINE
SPEED SIG“ is displayed with the DTC at the same time.
Possible CauseINFOID:0000000001703619
• Harness or connectors
(Sensor circuit is open or shorted.)
• Output speed sensor (Secondary speed sensor)
• Input speed sensor (Primary speed sensor)
• Engine speed signal system
DTC Confirmation ProcedureINFOID:0000000001703620
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 MONITOR” 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 vehicle uphill (increased engine load) will help maintain the driving
conditions required for this test.
3. If DTC is detected, go to CVT-129, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000001703621
1.CHECK STEP MOTOR FUNCTION
Perform the self-diagnosis check. Refer to CVT-47, "
CONSULT-III Function (TRANSMISSION)".
Is a malfunction in the step motor function indicated in the results?
YES >> Repair or replace damaged parts. (Check the step motor function. Refer to CVT-141.)
NO >> GO TO 2.
2.CHECK OUTPUT SPEED SENSOR (SECONDARY SPEED SENSOR SYSTEM) AND INPUT SPEED
SENSOR (PRIMARY SPEED SENSOR) SYSTEM
Check output speed sensor (secondary speed sensor) system and input speed sensor (primary speed sensor)
system. Refer to CVT-80
, CVT-76.

CVT-130
< SERVICE INFORMATION >
DTC P1723 CVT SPEED SENSOR FUNCTION
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.
3.CHECK ENGINE SPEED SIGNAL SYSTEM
Check engine speed signal system. Refer to CVT-85
.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts. Refer to EC-531
.
4.DETECT MALFUNCTIONING ITEM
Check the following:
• Power supply and ground circuit for TCM. Refer to CVT-121
.
• 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-129, "
DTC Confirmation Procedure".
OK or NG
OK >>INSPECTION END
NG >> Replace TCM or transaxle assembly. Refer to CVT-8, "
Service After Replacing TCM and Tran-
saxle Assembly", CVT-178, "Removal and Installation".

DTC P1726 ELECTRIC THROTTLE CONTROL SYSTEM
CVT-131
< SERVICE INFORMATION >
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DTC P1726 ELECTRIC THROTTLE CONTROL SYSTEM
DescriptionINFOID:0000000001703622
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:0000000001703623
• This is not an OBD-II self-diagnostic item.
• Diagnostic trouble code “P1726 ELEC TH CONTROL” with CONSULT-III is detected when the electronically
controlled throttle for ECM is malfunctioning.
Possible CauseINFOID:0000000001703624
Harness or connectors
(Sensor circuit is open or shorted.)
DTC Confirmation ProcedureINFOID:0000000001703625
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-131, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000001703626
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-109, "
CONSULT-II
Function (ENGINE)".
OK or NG
OK >> GO TO 2.
NG >> Check the DTC Detected Item. Refer to EC-109, "
CONSULT-II Function (ENGINE)".
• If CAN communication line is detected, go to CVT-56
.
2.CHECK DTC
Perform CVT-131, "
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-8, "Service After Replacing TCM and Transaxle Assembly".
NG >> Repair or replace damaged parts.

CVT-132
< SERVICE INFORMATION >
DTC P1740 LOCK-UP SELECT SOLENOID VALVE CIRCUIT
DTC P1740 LOCK-UP SELECT SOLENOID VALVE CIRCUIT
DescriptionINFOID:0000000001703627
• The lock-up select solenoid valve is included in the control valve assembly.
• The lock-up select solenoid valve controls lock-up clutch pressure or forward clutch pressure (reverse brake
pressure).
• When controlling lock-up clutch, the valve is turned OFF. When controlling forward clutch, it is turned ON.
CONSULT-III Reference Value in Data Monitor ModeINFOID:0000000001703628
On Board Diagnosis LogicINFOID:0000000001703629
• This is an OBD-II self-diagnostic item.
• Diagnostic trouble code “P1740 LU-SLCT SOL/CIRC” with CONSULT-III is detected under the following con-
ditions.
- When TCM compares target value with monitor value and detects an irregularity.
Possible CauseINFOID:0000000001703630
• Lock-up select solenoid valve
• Harness or connectors
(Solenoid circuit is open or shorted.)
DTC Confirmation ProcedureINFOID:0000000001703631
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.
RANGE: “D” position and “N” position
(At each time, wait for 5 seconds.)
4. If DTC is detected, go to CVT-134, "
Diagnosis Procedure" .
WITH GST
Follow the procedure “WITH CONSULT-III”.
Item name Condition Display value
LUSEL SOL OUTSelector lever in “P” and “N” positions ON
Wait at least for 5 seconds with the selector lever
in “R”, “D” and “L” positionsOFF

CVT-136
< SERVICE INFORMATION >
DTC P1745 LINE PRESSURE CONTROL
DTC P1745 LINE PRESSURE CONTROL
DescriptionINFOID:0000000001703635
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.
On Board Diagnosis LogicINFOID:0000000001703636
• This is not an OBD-II self-diagnostic item.
• Diagnostic trouble code “P1745 L/PRESS CONTROL” with CONSULT-III is detected when TCM detects the
unexpected line pressure.
Possible CauseINFOID:0000000001703637
TCM
DTC Confirmation ProcedureINFOID:0000000001703638
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 MONITOR” 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-136, "
Diagnosis Procedure" .
Diagnosis ProcedureINFOID:0000000001703639
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-26, "
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-47, "
CONSULT-III Function (TRANSMISSION)" .
Is the
“P1745 L/PRESS CONTROL” displayed?
YES >> Replace TCM. Refer to CVT-8, "Service After Replacing TCM and Transaxle Assembly" .
NO >>INSPECTION END

DTC P1777 STEP MOTOR - CIRCUIT
CVT-139
< SERVICE INFORMATION >
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Diagnosis ProcedureINFOID:0000000001703646
1.CHECK INPUT SIGNALS
With CONSULT-III
1. Start engine.
2. Select “SELECTION FROM MENU” in “DATA MONITOR” 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-140, "
Component Inspection" .
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts.
4.CHECK DTC
Perform CVT-137, "
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
Ye s
CVT unit harness connector F46 6
TCM E31 12
Ye s
CVT unit harness connector F46 7
TCM E31 20
Ye s
CVT unit harness connector F46 8
TCM E31 21
Ye s
CVT unit harness connector F46 9
SCIA4695E