Nissan Maxima Service and Repair Manual: Lock-up and select control system

System Diagram

System Description

  •  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 position, the engine speed, and the secondary pulley (output) revolution speed to lessen the shift shock.

Component Parts Location

  1.  CVT shift selector assembly (Manual mode select switch and manual mode position select switch)
  2.  Secondary speed sensor
  3.  CVT unit harness connector
  4.  TCM
  5.  Accelerator pedal position (APP) sensor
  6.  Shift positioner indicator Manual mode indicator DS mode indicator
  7.  Paddle shifters

Component Description

TRANSAXLE ASSEMBLY

EXCEPT TRANSAXLE ASSEMBLY

    Control system
    System Diagram System Description The CVT senses vehicle operating conditions through various sensors. It always controls the optimum shift position and reduces shifting and lock-up shocks. T ...

    Shift control system
    System Diagram NOTE: The gear ratio is set for each position separately. System Description In order to select the gear ratio that can obtain the driving force in accordance with driver's inten ...

    Other materials:

    Parking, license plate and tail lamps
    System Diagram System Description BCM (Body Control Module) controls parking, license plate and tail lamps operation. IPDM E/R (Intelligent Power Distribution Module Engine Room) operates parking, license plate and tail lamps according to CAN communication signals from BCM. Comp ...

    Removal and installation
    EXHAUST SYSTEM Exploded View Front exhaust tube Ring gasket Front exhaust tube stay Front exhaust tube bracket Gasket Center exhaust tube rubber hanger Center exhaust tube Center exhaust tube hanger Rear muffler bracket (RH) Rear muffler (RH) Rear muffler bracket (LH) ...

    Parking, license plate and tail lamps system
    Wiring Diagram ...

    Nissan Maxima Owners Manual

    Nissan Maxima Service and Repair Manual

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