2009 NISSAN TIIDA e control

CVT SYSTEM
CVT-207
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Lock-up and Se
lect Control INFOID:0000000004305581
• The torque converter clutch piston in the torque conv erter is engaged to eliminate torque converter slip to
increase power transmission efficiency.
• The torque converter clutch control valve operation is controlled by the torque converter clutch solenoid
valve, which is controlled by a signal from TCM. The torque converter clutch control valve engages or
releases the torque converter clutch piston.
• When shifting between “N” (“P”) ⇔ “D” (“R”), torque converter clutch solenoid controls engagement power of
forward clutch and reverse brake.
• The lock-up applied gear range was expanded by locking up the torque converter at a lower vehicle speed than conventional CVT
models.
TORQUE CONVERTER CLUTCH AND SELECT CONTROL VALVE CONTROL
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:0000000004305582
FUNCTION OF CONTROL VALVE SCIA1958E
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Fail-Safe INFOID:0000000004305589
The TCM has an electrical fail-safe mode. This mode make s it possible to operate even if there is an error in a
main electronic control input/output signal circuit.
FAIL-SAFE FUNCTION
If any malfunction occurs in a sensor or solenoid, th is function controls the CVT to make driving possible.
Output Speed Sensor (S econdary Speed Sensor)
The shift pattern is changed in accordance with thrott le position when an unexpected signal is sent from the
output speed sensor (secondary speed sensor) to the TCM. The overdrive-off mode is inhibited, and the tran-
saxle is put in “D”.
Input Speed Sensor (Primary Speed Sensor)
The shift pattern is changed in accordance with thro ttle position and secondary speed (vehicle speed) when
an unexpected signal is sent from the input speed sensor (primary speed sensor) to the TCM. The overdrive-
off mode is inhibited, and the transaxle is put in “D”.
PNP Switch
If an unexpected signal is sent from the PNP switch to the TCM, the transaxle is put in “D”.
CVT Fluid Temperature Sensor
If an unexpected signal is sent from the CVT fluid temper ature sensor to the TCM, the gear ratio in use before
receiving the unexpected signal is maintained or t he gear ratio is controlled to keep engine speed under 3500
rpm.
Transmission Fluid Pressure Sensor A (Secondary Pressure Sensor)
• If an unexpected signal is sent from the transmission fluid pressure sensor A (secondary pressure sensor) to
the TCM, the secondary pressure feedback control is stopped and the offset value obtained before the non-
standard condition occurs is used to control line pressure.
• If transmission fluid pressure sensor A (secondary pres sure sensor) error signal is input to TCM, secondary
pressure feedback control stops, but line pressure is controlled normally.
Pressure Control Solenoid A (Line Pressure Solenoid)
If an unexpected signal is sent from the solenoid to t he TCM, the pressure control solenoid A (line pressure
solenoid) is turned OFF to achieve the maximum fluid pressure.
Pressure Control Solenoid B (Secondary Pressure Solenoid)
If an unexpected signal is sent from the solenoid to t he TCM, the pressure control solenoid B (secondary pres-
sure solenoid) is turned OFF to achieve the maximum fluid pressure.
Torque Converter Clutch Solenoid
If an unexpected signal is sent from the solenoid to t he TCM, the torque converter clutch solenoid is turned
OFF to cancel the lock-up.
Step Motor
If an unexpected signal is sent from the step motor to the TCM, the step motor coil phases “A” through “D” are
all turned OFF to hold the gear ratio used right before the non-standard condition occurred.
CVT Lock-up Select Solenoid Priority Detected items (DTC)
1 U1000 CAN communication line
2 Except above

TROUBLE DIAGNOSIS
CVT-213
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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:0000000004305590
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-diagnos tic 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. Most intermittent errors are caused
by poor electric connections or impr oper wiring. In this case, careful
checking of suspected circuits may help prevent the replacement of
good parts.
A visual check only may not find t he 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
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CVT-218< SERVICE INFORMATION >
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TROUBLE DIAGNOSIS
CVT Electrical Parts Location INFOID:0000000004305591
1. O/D OFF indicator lamp 2. Shift position indicator 3. Accelerator pedal position sensor
4. CVT unit harness connector 5. Fuel door release 6. TCM
7. Overdrive control switch BCIA0033E

TROUBLE DIAGNOSIS
CVT-223
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Road Test
INFOID:0000000004305594
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-224 .
2. “Check at Idle” CVT-224 .
3. “Cruise Test” CVT-226 .
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 (lin e 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 (l ine 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-226< SERVICE INFORMATION >
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TROUBLE DIAGNOSIS
Cruise Test INFOID:00000000043055971.
CHECK VEHICLE SPEED WHEN SHIFTING GEARS — PART 1
1. Drive vehicle for approximately 10 minutes to wa rm engine oil and CVT fluid up to operating temperature.
2. Park vehicle on flat surface.
3. Move selector lever to “P” position.
4. Start engine.
5. Move selector lever to “L” position.
6. Accelerate vehicle to 2/8-way throttle depressing accelerator pedal constantly.
Read vehicle speed and engine speed. Refer to CVT- 228, " Vehicle Speed When Shifting Gears " .
OK or NG OK >> GO TO 2.
NG >> Mark the box of CVT-331, " Vehicle Speed Does Not
Change in "L" Position " on the
CVT-213, " How to Per-
form Trouble Diagnosis for Quick and Accurate Repair " .
Continue “Road Test”. 2.
CHECK VEHICLE SPEED WHEN SHIFTING GEARS — PART 2
1. Park vehicle on flat surface.
2. Move selector lever to “D” position.
3. Push overdrive control switch. (O/D OFF indicator lamp is on.)
4. Accelerate vehicle to 2/8-way throttle depressing accelerator pedal constantly.
Read vehicle speed and engine speed. Refer to CVT- 228, " Vehicle Speed When Shifting Gears " .
OK or NG OK >> GO TO 3.
NG >> Mark the box of CVT-332, " Vehicle Speed Does Not
Change in overdrive-off mode " on the
CVT-213, " How
to Perform Trouble Diagnosis for Quick and Accurate
Repair " . Continue “Road Test”.
3.
CHECK VEHICLE SPEED WHEN SHIFTING GEARS — PART 3
1. Park vehicle on flat surface.
2. Move selector lever to “D” position.
3. Push overdrive control switch. (O/D OFF indicator lamp is off.)
4. Accelerate vehicle to 2/8-way throttle depressing accelerator pedal constantly.
Read vehicle speed and engine speed. Refer to CVT- 228, " Vehicle Speed When Shifting Gears " .
OK or NG OK >> GO TO 4.
NG >> Mark the box of CVT-333, " Vehicle Speed Does Not
Change in "D" Position " on the
CVT-213, " How to Per-
form Trouble Diagnosis for Quick and Accurate Repair " .
Continue “Road Test”. 4.
CHECK VEHICLE SPEED WHEN SHIFTING GEARS — PART 4
1. Park vehicle on flat surface.
2. Move selector lever to “L” position. CVT fluid operating temperature: 50 - 80
°C (122 - 176 °F) SCIA6644E
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TROUBLE DIAGNOSIS
CVT-227
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3. Accelerate vehicle to full depression depressing accelerator
pedal constantly.
Read vehicle speed and engine speed. Refer to CVT- 228, " Vehicle Speed When Shifting Gears " .
OK or NG OK >> GO TO 5.
NG >> Mark the box of CVT-331, " Vehicle Speed Does Not
Change in "L" Position " on the
CVT-213, " How to Per-
form Trouble Diagnosis for Quick and Accurate Repair " .
Continue “Road Test”. 5.
CHECK VEHICLE SPEED WHEN SHIFTING GEARS — PART 5
1. Park vehicle on flat surface.
2. Move selector lever to “D” position.
3. Push overdrive control switch. (O/D OFF indicator lamp is on.)
4. Accelerate vehicle to full depressing depressing accelerator pedal constantly.
Read vehicle speed and engine speed. Refer to CVT- 228, " Vehicle Speed When Shifting Gears " .
OK or NG OK >> GO TO 6.
NG >> Mark the box of CVT-332, " Vehicle Speed Does Not
Change in overdrive-off mode " on the
CVT-213, " How
to Perform Trouble Diagnosis for Quick and Accurate
Repair " . Continue “Road Test”.
6.
CHECK VEHICLE SPEED WHEN SHIFTING GEARS — PART 6
1. Park vehicle on flat surface.
2. Move selector lever to “D” position.
3. Push overdrive control switch. (O/D OFF indicator lamp is off.)
4. Accelerate vehicle to full depression depressing accelerator
pedal constantly.
Read vehicle speed and engine speed. Refer to CVT- 228, " Vehicle Speed When Shifting Gears " .
OK or NG OK >> GO TO 7.
NG >> Mark the box of CVT-333, " Vehicle Speed Does Not
Change in "D" Position " on the
CVT-213, " How to Per-
form Trouble Diagnosis for Quick and Accurate Repair " .
Continue “Road Test”. 7.
CHECK ENGINE BRAKE FUNCTION — PART 1
1. Release accelerator pedal.
2. Check engine brake. (O/D OFF indicator lamp is off.)
Does engine braking effectively reduce speed in “ D ” position?
YES >> GO TO 8.
NO >> Mark the box of CVT-333, " Vehicle Does Not Decelerate by Engine Brake " on the
CVT-213, " How
to Perform Trouble Diagnosis for Quick and Accurate Repair " . Continue “Road Test”.
8.
CHECK ENGINE BRAKE FUNCTION — PART 2
1. Push overdrive control switch. (O/D OFF indicator lamp is on.)
2. Check engine brake.
Does engine braking effectively reduce speed in “ D ” position?
YES >> GO TO 9.
NO >> Mark the box of CVT-333, " Vehicle Does Not Decelerate by Engine Brake " on the
CVT-213, " How
to Perform Trouble Diagnosis for Quick and Accurate Repair " . Continue “Road Test”. SCIA4366E
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CVT-228< SERVICE INFORMATION >
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TROUBLE DIAGNOSIS 9.
CHECK ENGINE BRAKE FUNCTION — PART 3
1. Move selector lever to “L” position.
2. Check engine brake.
Does engine braking effectively reduce speed in “ L ” position?
YES >> 1. Stop the vehicle.
2. Perform self-diagnosis. Refer to CVT-230, " CONSULT-III Function (TRANSMISSION) " .
NO >> Mark the box of CVT-333, " Vehicle Does Not Decelerate by Engine Brake " on the
CVT-213, " How
to Perform Trouble Diagnosis for Quick and Accurate Repair " . Then continue trouble diagnosis.
Vehicle Speed When Shifting Gears INFOID:0000000004305598
Numerical value data are reference values.
CAUTION:
Lock-up clutch is engaged when vehicle speed is approximately 18 km/h (11 MPH) to 90 km/h (56 MPH).
TCM Terminal and Reference Value INFOID:0000000004305599
TCM HARNESS CONNECTOR TERMINAL LAYOUT
TERMINALS AND REFERENCE VALUES FOR TCM
Data are reference values and are measured between each terminal and ground. Engine type Throttle position Shift pattern
Engine speed (rpm)
At 40 km/h (25 MPH) At 60 km/h (37 MPH)
MR18DE 8/8
“D” position
Overdrive-off mode “L” position 3,600 - 4,500 4,400 - 5,300
2/8 “D” position 1,300 - 3,100 1,400 - 3,500
Overdrive-off mode 2,200 - 3,000 2,800 - 3,600 “L” position 3,100 - 4,000 3,800 - 4,700 WCIA0717E
Terminal
Wire
color Item Condition Data (Approx.)
1 GR Pressure control
solenoid valve A
(Line pressure
solenoid valve)
and Release your foot from the accelerator pedal. 5.0 - 7.0 V
Press the accelerator pedal all the way down. 1.0 - 3.0 V
2 LG Pressure control
solenoid valve B
(Secondary
pressure sole-
noid valve) Release your foot from the accelerator pedal. 5.0 - 7.0 V
Press the accelerator pedal all the way down. 3.0 - 4.0 V
3 SB Torque converter
clutch solenoid
valve When vehi-
cle cruises in
“D” position. When CVT performs lock-up. 6.0 V
When CVT does not perform lock-up. 1.0 V