2009 NISSAN TIIDA engine control system

CVT
N
O
P
N
Description ..........................................................
..
293
CONSULT-III Refe rence Value in Data Monitor
Mode ................................................................... ..
293
On Board Diagnosis Logic .................................. ..293
Possible Cause ................................................... ..293
DTC Confirmation Procedure .............................. ..293
Diagnosis Procedure ........................................... ..293
DTC P1701 TRANSMISSION CONTROL
MODULE (POWER SUPPLY) ........................ ..295
Description .......................................................... ..295
On Board Diagnosis Logic .................................. ..295
Possible Cause ................................................... ..295
DTC Confirmation Procedure .............................. ..295
Wiring Diagram - CVT - POWER ........................ ..296
Diagnosis Procedure ........................................... ..297
DTC P1705 THROTTLE POSITION SENSOR ..299
Description .......................................................... ..299
CONSULT-III Refe rence Value in Data Monitor
Mode ................................................................... ..
299
On Board Diagnosis Logic .................................. ..299
Possible Cause ................................................... ..299
DTC Confirmation Procedure .............................. ..299
Diagnosis Procedure ........................................... ..299
DTC P1722 ESTM VEHICLE SPEED SIGNAL ..301
Description .......................................................... ..301
CONSULT-III Refe rence Value in Data Monitor
Mode ................................................................... ..
301
On Board Diagnosis Logic .................................. ..301
Possible Cause ................................................... ..301
DTC Confirmation Procedure .............................. ..301
Diagnosis Procedure ........................................... ..301
DTC P1723 CVT SPEED SENSOR FUNC-
TION ............................................................... ..303
Description .......................................................... ..303
On Board Diagnosis Logic .................................. ..303
Possible Cause ................................................... ..303
DTC Confirmation Procedure .............................. ..303
Diagnosis Procedure ........................................... ..303
DTC P1726 ELECTRIC THROTTLE CON-
TROL SYSTEM .............................................. ..
305
Description .......................................................... ..305
On Board Diagnosis Logic .................................. ..305
Possible Cause ................................................... ..305
DTC Confirmation Procedure .............................. ..305
Diagnosis Procedure ........................................... ..305
DTC P1740 LOCK-UP SELECT SOLENOID
VALVE CIRCUIT ............................................ ..
306
Description .......................................................... ..306
CONSULT-III Refe rence Value in Data Monitor
Mode ................................................................... ..
306
On Board Diagnosis Logic .................................. ..306
Possible Cause ................................................... ..306
DTC Confirmation Procedure .............................. ..306
Wiring Diagram - CVT - L/USSV ......................... ..307 Diagnosis Procedure ...........................................
..308
Component Inspection ......................................... ..309
DTC P1745 LINE PRESSURE CONTROL ..... 310
Description ........................................................... ..310
On Board Diagnosis Logic ................................... ..310
Possible Cause .................................................... ..310
DTC Confirmation Procedure .............................. ..310
Diagnosis Procedure ........................................... ..310
DTC P1777 STEP MOTOR - CIRCUIT ........... 311
Description ........................................................... ..311
CONSULT-III Reference Va lue in Data Monitor
Mode .................................................................... ..
311
On Board Diagnosis Logic ................................... ..311
Possible Cause .................................................... ..311
DTC Confirmation Procedure .............................. ..311
Wiring Diagram - CVT - STM ............................... ..312
Diagnosis Procedure ........................................... ..313
Component Inspection ......................................... ..314
DTC P1778 STEP MOTOR - FUNCTION ....... 315
Description ........................................................... ..315
CONSULT-III Reference Va lue in Data Monitor
Mode .................................................................... ..
315
On Board Diagnosis Logic ................................... ..315
Possible Cause .................................................... ..315
DTC Confirmation Procedure .............................. ..315
Diagnosis Procedure ........................................... ..316
OVERDRIVE CONTROL SWITCH .................. 317
Description ........................................................... ..317
CONSULT-III Reference Va lue in Data Monitor
Mode .................................................................... ..
317
Wiring Diagram - CVT - ODSW ........................... ..318
Diagnosis Procedure ........................................... ..318
Component Inspection ......................................... ..320
SHIFT POSITION INDICATOR CIRCUIT ........ 322
Description ........................................................... ..322
CONSULT-III Reference Va lue in Data Monitor
Mode .................................................................... ..
322
Diagnosis Procedure ........................................... ..322
TROUBLE DIAGNOSIS FOR SYMPTOMS .... 323
Wiring Diagram - CVT - NONDTC ....................... ..323
O/D OFF Indicator Lamp Does Not Come On ..... ..325
Engine Cannot Be Started in "P" and "N" Position ..327
In "P" Position, Vehicle Moves Forward or Back-
ward When Pushed ............................................. ..
327
In "N" Position, Vehicle Moves ............................ ..328
Large Shock "N" → "R" Position .......................... ..328
Vehicle Does Not Creep Backward in "R" Position ..329
Vehicle Does Not Creep Forward in "D" or "L" Po-
sition .................................................................... ..
330
Vehicle Speed Does Not Change in "L" Position . ..331
Vehicle Speed Does Not Change in overdrive-off
mode .................................................................... ..
332
Vehicle Speed Does Not Change in "D" Position .. 333
Vehicle Does Not Decelerate by Engine Brake ... ..333

CVT
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PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER" INFOID:0000000004800719
The Supplemental Restraint System such as “A IR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severi ty of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and w hether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WARNING:
• To avoid rendering the SRS inoper ative, which could increase the risk of personal injury or death in
the event of a collision which would result in air bag inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.
• Improper maintenance, including in correct removal and installation of the SRS can lead to personal
injury caused by unintentional act ivation of the system. For removal of Spiral Cable and Air Bag
Module, see the SRS section.
• Do not use electrical test equipm ent on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identi fied by yellow and/or orange harnesses or har-
ness connectors.
• When working near the Airbag Diagnosis Sensor Un it or other Airbag System sensors with the Igni-
tion ON or engine running, DO NOT use air or el ectric power tools or strike near the sensor(s) with a
hammer. Heavy vibration could activate the sensor( s) and deploy the air bag(s), possibly causing
serious injury.
• When using air or electric power tools or hammers , always switch the Ignition OFF, disconnect the
battery, and wait at least 3 minutes before performing any service.
Precaution Necessary for Steering Wh eel Rotation After Battery Disconnect
INFOID:0000000004666854
NOTE:
• This Procedure is applied only to models with Intell igent Key system and NVIS/IVIS (NISSAN/INFINITI
VEHICLE IMMOBILIZER SYSTEM - NATS).
• Remove and install all control units after disconnecti ng both battery cables with the ignition knob in the
″ LOCK ″ position.
• Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.
If DTC is detected, perform trouble diagnosis according to self-diagnostic results.
For models equipped with the Intelligent Key system and NVIS/IVIS, an electrically controlled steering lock
mechanism is adopted on the key cylinder.
For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and
steering wheel rotation will become impossible.
If steering wheel rotation is required when battery pow er is interrupted, follow the procedure below before
starting the repair operation.
OPERATION PROCEDURE 1. Connect both battery cables. NOTE:
Supply power using jumper cables if battery is discharged.
2. Use the Intelligent Key or mechanical key to turn the ignition switch to the ″ACC ″ position. At this time, the
steering lock will be released.
3. Disconnect both battery cables. The steering lock will remain released and the steering wheel can be
rotated.
4. Perform the necessary repair operation.
5. When the repair work is completed, return the ignition switch to the ″LOCK ″ position before connecting
the battery cables. (At this time, the steering lock mechanism will engage.)
6. Perform a self-diagnosis check of al l control units using CONSULT-III.

CVT
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Lock-up and Select Control System Diagram
Lock-up Released In the lock-up released state, the torque converter clutch control valve is set into the unlocked state by the
torque converter clutch solenoid and the lock-up apply pressure is drained.
In this way, the torque converter clutch piston is not coupled.
Lock-up Applied In the lock-up applied state, the torque converter clutch control valve is set into the locked state by the torque
converter clutch solenoid and lock-up apply pressure is generated.
In this way, the torque converter clutch piston is pressed and coupled.
Select Control When shifting between “N” (“P”) ⇔“D” (“R”), optimize the operating pressure on the basis of the throttle posi-
tion, the engine speed, and the secondary pulley (out put) revolution speed to lessen the shift shock.
Control Valve INFOID:0000000004666874
FUNCTION OF CONTROL VALVE

CVT-34< SERVICE INFORMATION >
[RE0F08A]
TROUBLE DIAGNOSIS
If an unexpected signal is sent from the solenoid to t he TCM, the CVT lock-up select solenoid is turned OFF to
cancel the lock-up.
TCM Power Supply (Memory Back-up)
Transaxle assembly is protected by limiting the engine torque when the memory back-up power supply (for
controlling) from the battery is not supplied to TCM. Normal statues is restored when turning the ignition switch
OFF to ON after the normal power supply.
How to Perform Trouble Diagnosis for Quick and Accurate Repair INFOID:0000000004666882
INTRODUCTION
The TCM receives a signal from the vehicle speed sensor, PNP switch and provides shift control or lock-up
control via CVT solenoid valves.
The TCM also communicates with the ECM by means of a signal
sent from sensing elements used wit h the OBD-related parts of the
CVT system for malfunction-diagnostic purposes. The TCM is capa-
ble of diagnosing malfunctioning parts while the ECM can store mal-
functions in its memory.
Input and output signals must always be correct and stable in the
operation of the CVT system. The CVT system must be in good
operating condition and be free of valve seizure, solenoid valve mal-
function, etc.
It is much more difficult to diagnose an error that occurs intermit-
tently rather than continuously. Mo st intermittent errors are caused
by poor electric connections or improper wiring. In this case, careful
checking of suspected circuits ma y help prevent the replacement of
good parts.
A visual check only may not find the cause of the errors. A road test
with CONSULT-III (or GST) or a circuit tester connected should be
performed. Follow the "WORK FLOW" .
Before undertaking actual checks, take a few minutes to talk with a
customer who approaches with a driveability complaint. The cus-
tomer can supply good information about such errors, especially
intermittent ones. Find out what symptoms are present and under
what conditions they occur. A “DIAGNOSTIC WORKSHEET” as
shown on the example (Refer to "Diagnostic Worksheet Chart" )
should be used.
Start your diagnosis by looking for “conventional” errors first. This will
help troubleshoot driveability errors on an electronically controlled
engine vehicle.
Also check related Service bulletins.
WORK FLOW
A good understanding of the malfunction conditions can make troubleshooting faster and more accurate.
In general, each customer feels differently about a malf unction. It is important to fully understand the symp-
toms or conditions for a customer complaint.
Make good use of the two sheets provided, "Informati on From Customer" and "Diagnostic Worksheet Chart" ,
to perform the best troubleshooting possible.
Work Flow Chart SAT631IB
SAT632I
SEF234G

CVT-44< SERVICE INFORMATION >
[RE0F08A]
TROUBLE DIAGNOSIS
Road Test INFOID:0000000004666886
DESCRIPTION
• The purpose of the test is to determine overall performance of CVT and analyze causes of problems.
• The road test consists of the following three parts:
1. “Check Before Engine Is Started” CVT-45 .
2. “Check at Idle” CVT-45 .
3. “Cruise Test” CVT-47 .
Judgement Possible cause
Idle speed Low for all positions
(“P”, “R”, “N”, “D”, “L”) Possible causes include malfunctions in the pressure supply system and low oil pump output.
For example
• Oil pump wear
• Pressure regulator valve or plug sticking or spring fatigue
• Oil strainer ⇒ oil pump ⇒ pressure regulator valve passage oil leak
• Engine idle speed too low
Only low for a specific
position Possible causes include an oil pressure leak in a passage or device related to the position after
the pressure is distributed by the manual valve.
High Possible causes include a sensor malfunction or malfunction in the line pressure adjustment
function.
For example
• Accelerator pedal position signal malfunction
• CVT fluid temperature sensor malfunction
• Pressure control solenoid A (line pressure solenoid) malfunction (sticking in OFF state, filter
clog, cut line)
• Pressure regulator valve or plug sticking
Stall speed Line pressure does
not rise higher than
the line pressure for
idle. Possible causes include a sensor malfunction or malfunction in the pressure adjustment func-
tion.
For example
• Accelerator pedal position signal malfunction
• TCM malfunction
• Pressure control solenoid A (line pressure solenoid) malfunction (shorting, sticking in ON state)
• Pressure regulator valve or plug sticking
The pressure rises,
but does not enter the
standard position. Possible causes include malfunctions in the pressure supply system and malfunction in the pres-
sure adjustment function.
For example
• Accelerator pedal position signal malfunction
• Pressure control solenoid A (line pressure solenoid) malfunction (sticking, filter clog)
• Pressure regulator valve or plug sticking
Only low for a specific
position Possible causes include an oil pressure leak in a passage or device related to the position after
the pressure is distributed by the manual valve. SAT786A

CVT
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DTC P0868 SECONDARY PRESSURE DOWN
Description INFOID:0000000004667022
• The pressure control solenoid valve B (secondary pressure solenoid valve) is included in the control valve assembly.
• The pressure control solenoid valve B (secondary pressure solenoid valve) regulates the secondary 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:0000000004667023
Remarks: Specification data are reference values.
On Board Diagnosis Logic INFOID:0000000004667024
• This is not an OBD-II self-diagnostic item.
• Diagnostic trouble code “P0868 SEC/PRESS DOWN” with CONSULT-III is detected when secondary fluid
pressure is too low compared with the commanded value while driving.
Possible Cause INFOID:0000000004667025
• Harness or connectors (Solenoid circuit is open or shorted.)
• Pressure control solenoid valve B (Secondary pressure solenoid valve) system
• Transmission fluid pressure sensor A (Secondary pressure sensor)
• Line pressure control system
DTC Confirmation Procedure INFOID:0000000004667026
CAUTION:
Always drive vehicle at a safe speed.
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 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-123, " Diagnosis Procedure " .
Diagnosis Procedure INFOID:0000000004667027

CVT
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DTC P1723 CVT SPEED SENSOR FUNCTION
Description INFOID:0000000004667046
• The input speed sensor (primary speed sensor) is included in the control valve assembly.
• The vehicle speed sensor CVT [output speed sensor (s econdary 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 Logic INFOID:0000000004667047
• 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 Cause INFOID:0000000004667048
• 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 Procedure INFOID:0000000004667049
CAUTION:
Always drive vehicle at a safe speed.
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 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-133, " Diagnosis Procedure " .
Diagnosis Procedure INFOID:0000000004667050CONSULT-III Functi
on (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-145 .)
NO >> GO TO 2.
2. CHECK OUTPUT SPEED SENSOR (SECONDARY SPEED SENSOR SYSTEM) AND INPUT SPEED ,
CVT-80 .

CVT
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DTC P1726 ELECTRIC TH
ROTTLE CONTROL SYSTEM
Description INFOID:0000000004667051
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:0000000004667052
• 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:0000000004667053
Harness or connectors
(Sensor circuit is open or shorted.)
DTC Confirmation Procedure INFOID:0000000004667054
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-135, " Diagnosis Procedure " .
Diagnosis Procedure INFOID:0000000004667055 CONSULT-III
Function (ENGINE) " .
OK or NG OK >> GO TO 2.
NG >> Check the DTC Detected Item. Refer to EC-604, " CONSULT-III F
unction (ENGINE) " .
• If CAN communication line is detected, go to CVT-60 .
DTC Confirmation Procedure " .
OK or NG OK >>
INSPECTION END
NG >> GO TO 3. OK >> Replace TCM. Refer to
CVT-12, " Service After Replacing TCM and Transaxle Assembly " .
NG >> Repair or replace damaged parts.