Ioni NISSAN TEANA 2008 Service Manual

TM-178
< BASIC INSPECTION >[CVT: RE0F10A]
DIAGNOSIS AND REPAIR WORK FLOW
DIAGNOSTIC WORK SHEET
Symptomso Vehicle does not move. (o Any positiono Particular position)
o No shift
o Lock-up malfunction
o Shift shock or slip (o N → Do N → Ro Lock-upo Any drive position)
o Noise or vibration
o No pattern select
o Others
()
Malfunction Indicator (MI)o Continuously lito Not lit
1o Read the item on cautions concerning fail-safe and understand the customer's complaint.TM-283
2o CVT fluid inspection, stall test and line pressure test
o CVT fluid inspection
TM-304
o Leak (Repair leak location.)
o State
o Amount
o Stall test
TM-306
,
TM-308
o Torque converter one-way clutch
o Reverse brake
o Forward clutch
o Steel belto Engine
o Line pressure low
o Primary pulley
o Secondary pulley
o Line pressure inspection - Suspected part:
3o Perform self-diagnosis.
TM-204
Enter checks for detected items.
4o Perform road test.TM-310
4-1. Check before engine is started TM-310
4-2. Check at idleTM-311
4-3. Cruise testTM-312
o Check malfunction phenomena to repair or replace malfunctioning part after completing all road tests. Refer to TM-286,
"Symptom Table".
5o Drive vehicle to check that the malfunction phenomenon has been resolved.
6o Erase the results of the self-diagnosis from the TCM and the ECM.TM-202
,
TM-204

TM-184
< FUNCTION DIAGNOSIS >[CVT: RE0F10A]
MECHANICAL SYSTEM
System Diagram
INFOID:0000000003806350
System DescriptionINFOID:0000000003806351
Transmits the power from the engine to the drive wheel.
JPDIA0743GB

MECHANICAL SYSTEM
TM-185
< FUNCTION DIAGNOSIS >[CVT: RE0F10A]
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Component Parts LocationINFOID:0000000003809651
*: Control valve assembly is included in CVT assembly.
NOTE:
The following components are included in control valve assembly (8).
 CVT fluid temperature sensor
 Torque converter clutch solenoid valve
 Line pressure solenoid valve
 Step motor
 ROM assembly
 Secondary pressure sensor
 Secondary pressure solenoid valve
 Lock-up select solenoid valve
1. Sport mode switch 2. Shift position indicator 3. SPORT indicator lamp
4. TCM 5. Secondary speed sensor 6. PNP switch
7. Primary speed sensor 8.
Control valve assembly
*9. CVT unit connector
10. Accelerator pedal position sensor
A. Center console B. Combination meter C. Engine room LH
D. CVT assembly E. Accelerator pedal, upper
JPDIA0746ZZ

HYDRAULIC CONTROL SYSTEM
TM-187
< FUNCTION DIAGNOSIS >[CVT: RE0F10A]
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HYDRAULIC CONTROL SYSTEM
System DiagramINFOID:0000000003806354
System DescriptionINFOID:0000000003806355
The hydraulic control mechanism consists of the oil pump directly driven by the engine, the hydraulic control
valve that controls line pressure and transmission, and the input signal line.
LINE PRESSURE AND SECONDARY PRESSURE CONTROL
 When an input torque signal equivalent to the engine driving force is transmitted from the ECM to the TCM,
the TCM controls the line pressure solenoid valve and secondary pressure solenoid valve.
 Line pressure solenoid valve activates pressure regulator valve, and line pressure from oil pump is adjusted
for the optimum driving condition. Secondary pressure is controlled by lowering line pressure.
JPDIA0733GB
SCIA1846E

TM-188
< FUNCTION DIAGNOSIS >[CVT: RE0F10A]
HYDRAULIC CONTROL SYSTEM
Normal Control
Optimize the line pressure and secondary pressure, depending on driving conditions, on the basis of the throt-
tle position, the engine speed, the primary pulley (input) revolution speed, the secondary pulley (output) revo-
lution speed, the brake signal, the PNP switch signal, the lock-up signal, the voltage, the target gear ratio, the
fluid temperature, and the fluid pressure.
Feedback Control
For the normal fluid control and the select fluid control, secondary pressure is detected for feedback control by
using a secondary pressure sensor to set a high-precision secondary pressure.
Component Parts LocationINFOID:0000000003809652
*: Control valve assembly is included in CVT assembly.
NOTE:
The following components are included in control valve assembly (8).
 CVT fluid temperature sensor
1. Sport mode switch 2. Shift position indicator 3. SPORT indicator lamp
4. TCM 5. Secondary speed sensor 6. PNP switch
7. Primary speed sensor 8.
Control valve assembly
*9. CVT unit connector
10. Accelerator pedal position sensor
A. Center console B. Combination meter C. Engine room LH
D. CVT assembly E. Accelerator pedal, upper
JPDIA0746ZZ

HYDRAULIC CONTROL SYSTEM
TM-189
< FUNCTION DIAGNOSIS >[CVT: RE0F10A]
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 Torque converter clutch solenoid valve
 Line pressure solenoid valve
 Step motor
 ROM assembly
 Secondary pressure sensor
 Secondary pressure solenoid valve
 Lock-up select solenoid valve
Component DescriptionINFOID:0000000003806357
TRANSAXLE ASSEMBLY
EXCEPT TRANSAXLE ASSEMBLY
Name Function
Torque converter regulator valve Optimizes the supply pressure for the torque converter depending on driving conditions.
Pressure regulator valve Optimizes the discharge pressure from the oil pump depending on driving conditions.
TCC control valve Activates or deactivates the lock-up.
 Locks-up smoothly by opening lock-up operation excessively.
Shift control valveControls inflow/outflow of line pressure from the primary pulley depending on the stroke
difference between the stepping motor and the primary pulley.
Secondary valve Controls the line pressure from the secondary pulley depending on operating conditions.
Clutch regulator valve Adjusts the clutch operating pressure depending on operating conditions.
Manual valveTransmits the clutch operating pressure to each circuit in accordance with the selected
position.
Select control valve Engages forward clutch, reverse brake smoothly depending on select operation.
Select switch valveThe select switch valve enables to select engagement/disengagement of lock-up clutch
and that of forward clutch and reverse clutch.
TCC solenoid valveTM-230
Secondary pressure solenoid valveTM-240
Line pressure solenoid valveTM-234
Step motorTM-261
Lock-up select solenoid valveTM-258
Primary speed sensorTM-218
Secondary speed sensorTM-222
PNP switchTM-213
Primary pulley
TM-186
Secondary pulley
Forward clutch
Torque converter
Name Function
TCMJudges the vehicle driving status according to the signal from each sensor and controls
the non-step transmission mechanism properly.
Accelerator pedal position sensorTM-252

TM-190
< FUNCTION DIAGNOSIS >[CVT: RE0F10A]
CONTROL SYSTEM
CONTROL SYSTEM
System DiagramINFOID:0000000003806358
System DescriptionINFOID:0000000003806359
The CVT senses vehicle operating conditions through various sensors. It always controls the optimum shift
position and reduces shifting and lock-up shocks.
TCM FUNCTION
The function of the TCM is to:
 Receive input signals sent from various switches and sensors.
 Determine required line pressure, shifting point, and lock-up operation.
 Send required output signals to the step motor and the respective solenoids.
INPUT/OUTPUT SIGNAL OF TCM
JPDIA0744GB
SENSORS (or SIGNALS)
⇒TCM
⇒ACTUATORS
PNP switch
Accelerator pedal position signal
Closed throttle position signal
Engine speed signal
CVT fluid temperature sensor
Vehicle speed signal
Sport mode switch signal
Stop lamp switch signal
Primary speed sensor
Secondary speed sensor
Secondary pressure sensorShift control
Line pressure control
Primary pressure control
Secondary pressure control
Lock-up control
Engine brake control
Vehicle speed control
Fail-safe control
Self-diagnosis
CONSULT-III communication
line
Duet-EA control
CAN system
On board diagnosisSte p m ot or
Torque converter clutch solenoid
valve
Lock-up select solenoid valve
Line pressure solenoid valve
Secondary pressure solenoid
valve
SPORT indicator lamp
Shift position indicator

CONTROL SYSTEM
TM-193
< FUNCTION DIAGNOSIS >[CVT: RE0F10A]
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Component DescriptionINFOID:0000000003806361
TRANSAXLE ASSEMBLY
EXCEPT TRANSAXLE ASSEMBLY
Name Function
PNP switchTM-213
CVT fluid temperature sensorTM-216
Primary speed sensorTM-218
Secondary speed sensorTM-222
Secondary pressure sensorTM-242
Step motorTM-261
TCC solenoid valveTM-230
Lock-up select solenoid valveTM-258
Line pressure solenoid valveTM-234
Secondary pressure solenoid valveTM-240
Name Function
TCMOptimally controls continuously variable transmission system by judging driving condi-
tions based on signals from each sensor.
Stop lamp switchTM-210

TM-194
< FUNCTION DIAGNOSIS >[CVT: RE0F10A]
LOCK-UP AND SELECT CONTROL SYSTEM
LOCK-UP AND SELECT CONTROL SYSTEM
System DiagramINFOID:0000000003806362
System DescriptionINFOID:0000000003806363
 The torque converter clutch piston in the torque converter 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 valve 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 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 valve 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 valve 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 (output) revolution speed to lessen the shift shock.
SCIA2374E
JPDIA0312GB

LOCK-UP AND SELECT CONTROL SYSTEM
TM-195
< FUNCTION DIAGNOSIS >[CVT: RE0F10A]
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Component Parts LocationINFOID:0000000003809654
*: Control valve assembly is included in CVT assembly.
NOTE:
The following components are included in control valve assembly (8).
 CVT fluid temperature sensor
 Torque converter clutch solenoid valve
 Line pressure solenoid valve
 Step motor
 ROM assembly
 Secondary pressure sensor
 Secondary pressure solenoid valve
 Lock-up select solenoid valve
1. Sport mode switch 2. Shift position indicator 3. SPORT indicator lamp
4. TCM 5. Secondary speed sensor 6. PNP switch
7. Primary speed sensor 8.
Control valve assembly
*9. CVT unit connector
10. Accelerator pedal position sensor
A. Center console B. Combination meter C. Engine room LH
D. CVT assembly E. Accelerator pedal, upper
JPDIA0746ZZ