2007 NISSAN TIIDA Service Repair Manual

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Page 4969 of 5883

NISSAN TIIDA 2007 Service Repair Manual A/T CONTROL SYSTEM
TM-23
< FUNCTION DIAGNOSIS >[TYPE 1 (4AT: RE4F03B)]
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P*1: Spare for vehicle speed sensor·A/T (revolution sensor)
*2: Spare for accelerator pedal positi

Page 4970 of 5883

NISSAN TIIDA 2007 Service Repair Manual TM-24
< FUNCTION DIAGNOSIS >[TYPE 1 (4AT: RE4F03B)]
A/T CONTROL SYSTEM
The line pressure is temporarily reduced corresponding to a change
in engine torque when shifting gears (that is, when the shift

Page 4971 of 5883

NISSAN TIIDA 2007 Service Repair Manual A/T CONTROL SYSTEM
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CONTROL OF SHIFT VALVES A AND B
Pilot pressure generated by the operation of shift solenoid valve

Page 4972 of 5883

NISSAN TIIDA 2007 Service Repair Manual TM-26
< FUNCTION DIAGNOSIS >[TYPE 1 (4AT: RE4F03B)]
A/T CONTROL SYSTEM
Lock-up Control System Diagram
Lock-up Released
In the lock-up released state, the torque converter clutch control valve is set

Page 4973 of 5883

NISSAN TIIDA 2007 Service Repair Manual A/T CONTROL SYSTEM
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OVERRUN CLUTCH OPERATING CONDITIONS
OVERRUN CLUTCH SOLENOID VALVE CONTROL
The overrun clutch sole

Page 4974 of 5883

NISSAN TIIDA 2007 Service Repair Manual TM-28
< FUNCTION DIAGNOSIS >[TYPE 1 (4AT: RE4F03B)]
A/T CONTROL SYSTEM
Control Valve
INFOID:0000000001694429
FUNCTION OF CONTROL VALVES
Centrifugal Cancel MechanismINFOID:0000000001694419
FUNCTION
The

TM-28
< FUNCTION DIAGNOSIS >[TYPE 1 (4AT: RE4F03B)]
A/T CONTROL SYSTEM
Control Valve
INFOID:0000000001694429
FUNCTION OF CONTROL VALVES
Centrifugal Cancel MechanismINFOID:0000000001694419
FUNCTION
The centrifugal cancel mechanism is a mechanism to cancel the centrifugal hydraulic pressure instead of the
conventional check balls. It cancels the centrifugal hydraulic pressure which is generated as high clutch drum
rotates, and it allows for preventing high clutch from dragging and for providing stable high clutch piston press-
ing force in all revolution speeds.
STRUCTURE/OPERATION
Valve name Function
Pressure regulator valve, plug and sleeve
plugRegulates oil discharged from the oil pump to provide optimum line pressure for all driving
conditions.
Pressure modifier valve and sleeve Used as a signal supplementary valve to the pressure regulator valve. Regulates pres-
sure-modifier pressure (signal pressure) which controls optimum line pressure for all driv-
ing conditions.
Pilot valve Regulates line pressure to maintain a constant pilot pressure level which controls lock-up
mechanism, overrun clutch, shift timing.
Accumulator control valve Regulates accumulator back-pressure to pressure suited to driving conditions.
Manual valve Directs line pressure to oil circuits corresponding to select positions.
Hydraulic pressure drains when the shift lever is in Neutral.
Shift valve A Simultaneously switches three oil circuits using output pressure of shift solenoid valve A
to meet driving conditions (vehicle speed, throttle opening, etc.).
Provides automatic downshifting and upshifting (1st → 2nd → 3rd → 4th gears/4th → 3rd
→ 2nd → 1st gears) in combination with shift valve B.
Shift valve B Simultaneously switches two oil circuits using output pressure of shift solenoid valve B in
relation to driving conditions (vehicle speed, throttle opening, etc.).
Provides automatic downshifting and upshifting (1st → 2nd → 3rd → 4th gears/4th → 3rd
→ 2nd → 1st gears) in combination with shift valve A.
Overrun clutch control valve Switches hydraulic circuits to prevent engagement of the overrun clutch simultaneously
with application of the brake band in D
4. (Interlocking occurs if the overrun clutch engages
during D
4.)
1st reducing valve Reduces low & reverse brake pressure to dampen engine-brake shock when downshift-
ing from the 1st position 1
2 to 11.
Overrun clutch reducing valve Reduces oil pressure directed to the overrun clutch and prevents engine-brake shock.
In the 1st and 2nd positions, line pressure acts on the overrun clutch reducing valve to
increase the pressure-regulating point, with resultant engine brake capability.
Torque converter relief valve Prevents an excessive rise in torque converter pressure.
Torque converter clutch control valve, plug
and sleeveActivates or inactivates the lock-up function.
Also provides smooth lock-up through transient application and release of the lock-up
system.
1-2 accumulator valve and piston Lessens the shock find when the 2nd gear band servo contracts, and provides smooth
shifting.
3-2 timing valve Switches the pace that oil pressure is released depending on vehicle speed; maximizes
the high clutch release timing, and allows for soft downshifting.
Shuttle valve Determines if the overrun clutch solenoid valve should control the 3-2 timing valve or the
overrun clutch control valve and switches between the two.
Cooler check valve At low speeds and with a small load when a little heat is generated, saves the volume of
cooler flow, and stores the oil pressure for lock-up.

Page 4975 of 5883

NISSAN TIIDA 2007 Service Repair Manual A/T CONTROL SYSTEM
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< FUNCTION DIAGNOSIS >[TYPE 1 (4AT: RE4F03B)]
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A centrifugal cancel housing is provided to cancel the clutch housing pressure. The centrifugal c

Page 4976 of 5883

NISSAN TIIDA 2007 Service Repair Manual TM-30
< FUNCTION DIAGNOSIS >[TYPE 1 (4AT: RE4F03B)]
A/T CONTROL SYSTEM
Component Parts Location
INFOID:0000000001694446
1. OD OFF indicator lamp 2. Shift position indicator 3. Accelerator pedal positi

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