Nissan Quest E52. Instruction — part 1196
TM-14
< SYSTEM DESCRIPTION >
[CVT: RE0F09B]
COMPONENT PARTS
• When pressure is applied to the ceramic device in the secondary pressure sensor, the ceramic device is
deformed, resulting in voltage change. TCM evaluates the secondary pressure from its voltage change. Volt-
age is increased along with pressure increase.
CVT CONTROL SYSTEM : Secondary Pressure Solenoid Valve
INFOID:0000000009650067
• The secondary pressure solenoid valve is included in the control valve assembly.
• The secondary pressure solenoid valve controls secondary valve. For detailed secondary valve, refer to
21, "TRANSAXLE : Component Description"
• The secondary pressure solenoid valve contains a linear solenoid valve [N/H (Normal High) type].
NOTE:
• The principle of the linear solenoid valve utilizes the fact that the force pressing on the valve spool installed
inside the coil increases nearly in proportion to the current. This allows it to produce a fluid pressure that is
proportional to this pressing force.
• The N/H (Normal High) produces hydraulic control when the coil is not energized.
CVT CONTROL SYSTEM : Line Pressure Solenoid Valve
INFOID:0000000009650068
• The line pressure solenoid valve is included in the control valve assembly.
• Line pressure solenoid valve controls pressure regulator valve. For detailed pressure regulator valve, refer
TM-21, "TRANSAXLE : Component Description"
.
• The line pressure solenoid valve contains a linear solenoid valve [N/H (Normal High) type].
NOTE:
• The principle of the linear solenoid valve utilizes the fact that the force pressing on the valve spool installed
inside the coil increases nearly in proportion to the current. This allows it to produce a fluid pressure that is
proportional to this pressing force.
• The N/H (Normal High) produces hydraulic control when the coil is not energized.
CVT CONTROL SYSTEM : Torque Converter Clutch Solenoid Valve
INFOID:0000000009650069
• The torque converter clutch solenoid valve is included in the control valve assembly.
• The torque converter clutch solenoid valve controls TCC control valve. For detailed TCC control valve, refer
TM-21, "TRANSAXLE : Component Description"
.
• The torque converter clutch solenoid valve contains a linear solenoid valve [N/L (Normal Low) type].
NOTE:
• The principle of the linear solenoid valve utilizes the fact that the force pressing on the valve spool installed
inside the coil increases nearly in proportion to the current. This allows it to produce a fluid pressure that is
proportional to this pressing force.
• The N/L (Normal Low) type does not produce hydraulic control when the coil is not energized.
CVT CONTROL SYSTEM : Lock-up Select Solenoid Valve
INFOID:0000000009650070
• The lock-up select solenoid valve is included in the control valve assembly.
• The lock-up select solenoid valve controls the select switch valve. For detailed secondary valve, refer to
21, "TRANSAXLE : Component Description"
• The lock-up select solenoid valve contains an ON/OFF solenoid valve.
NOTE:
JSDIA1831GB
COMPONENT PARTS
TM-15
< SYSTEM DESCRIPTION >
[CVT: RE0F09B]
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• The only operations of the valve spool installed inside the coil are pressing or not pressing the ball which
seals the hydraulic supply section into the seat. This A/T uses N/L (Normal Low) type.
• When voltage is not applied to the coil, the force of the pilot pressure presses the ball against the seat,
stopping the pilot pressure at that point.
• When voltage is applied to the coil, the valve is pulled in the direction of the coil, disengaging the hydraulic
seal which the ball creates. This supplies pilot pressure to the operating locations.
CVT CONTROL SYSTEM : Step Motor
INFOID:0000000009650071
The step motor changes the step by turning 4 coils ON/OFF according to the signal from TCM. As a result, the
flow of line pressure to primary pulley is changed and pulley ratio is controlled.
CVT CONTROL SYSTEM : ROM Assembly
INFOID:0000000009650072
The ROM assembly stores the calibration data (characteristic value) of each solenoid valve. TCM enables
accurate hydraulic control by obtaining the calibration data.
CVT CONTROL SYSTEM : Shift Position Indicator
INFOID:0000000009650073
• The shift position indicator is located in the combination meter.
• TCM transmits shift position signal to combination meter via CAN communication. The actual shift position is
displayed on combination meter according to the signal.
CVT CONTROL SYSTEM : Overdrive Control Switch
INFOID:0000000009650074
• The overdrive control switch is installed on the selector lever knob.
• If the overdrive control switch is pressed when the O/D OFF indicator lamp on the combination meter is not
lit, the status changes to overdrive OFF and the O/D OFF indicator lamp illuminates.
• If the overdrive control switch is pressed when the O/D OFF indicator lamp on the combination meter is lit,
the overdrive OFF status is canceled and the O/D OFF indicator lamp turns off.
CVT CONTROL SYSTEM : O/D OFF Indicator Lamp
INFOID:0000000009650075
• The O/D OFF indicator lamp is located in the combination meter.
• The O/D OFF indicator lamp illuminates when the overdrive function is deactivated (O/D OFF).
• For checking the bulb, this lamp turns on for a certain period of time when the ignition switch turns ON, and
then turns off.
CVT CONTROL SYSTEM : Stop Lamp Relay
INFOID:0000000009650076
The stop lamp relay is turned ON by the stop lamp switch operation.
SHIFT LOCK SYSTEM
Condition (status)
O/D OFF indicator lamp
Ignition switch OFF.
OFF
Ignition switch ON.
ON (Approx. 2 seconds)
Overdrive control switch is pressed when the selector lever is in the “D” position
and the O/D OFF indicator lamp is OFF (when system is normal).
ON
Overdrive control switch is pressed when the selector lever is in the “D” position
and the O/D OFF indicator lamp is ON.
OFF
Selector lever is shifted from the “D” position to another position when the O/D
OFF indicator lamp is ON.
OFF
TM-16
< SYSTEM DESCRIPTION >
[CVT: RE0F09B]
COMPONENT PARTS
SHIFT LOCK SYSTEM : Component Parts Location
INFOID:0000000009650077
COMPONENT DESCRIPTION
A.
CVT shift selector assembly
B.
Brake pedal, upper
JSDIA2754ZZ
No.
Component
Function
1
Shift lock release button
Forcibly releases the shift lock when pressed.
2
Shift lock solenoid
It operates according to the signal from the stop lamp switch and moves the lock lever.
3
Park position switch
It detects that the selector lever is in “P” position.
4
Stop lamp switch
• The stop lamp switch turns ON when the brake pedal is depressed.
• When the stop lamp switch turns ON, the shift lock solenoid is energized.
STRUCTURE AND OPERATION
TM-17
< SYSTEM DESCRIPTION >
[CVT: RE0F09B]
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STRUCTURE AND OPERATION
TRANSAXLE
TRANSAXLE : Exploded View
INFOID:0000000009650078
TRANSAXLE : Planetary Gear
INFOID:0000000009650079
• A planetary gear type of forward/reverse selector mechanism is installed between the torque converter and
primary pulley.
1.
Converter housing
2.
Oil pump
3.
Forward clutch
4.
Reverse brake
5.
Planetary carrier
6.
Primary pulley
7.
Steel belt
8.
Sun gear
9.
Side cover
10. Internal gear
11. Secondary pulley
12. Final gear
13. Differential case
14. Idler gear
15. Reduction gear
16. Taper roller bearing
17. Output gear
18. Parking gear
19. Input shaft
20. Torque converter
JSDIA2729ZZ
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