Nissan Maxima. Manual - part 1141

TM-28

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LOCK-UP AND SELECT CONTROL SYSTEM

Component Parts Location

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AWDIA0564ZZ

LOCK-UP AND SELECT CONTROL SYSTEM

TM-29

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Component Description

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TRANSAXLE ASSEMBLY

EXCEPT TRANSAXLE ASSEMBLY

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

7.

Shift positioner indicator
Manual mode indicator
DS mode indicator

8.

Paddle shifters

Name

Function

Torque converter regulator valve

TM-22

TCC control valve

Select control valve

Select switch valve

Manual valve

TCC solenoid valve

TM-67

Lock-up select solenoid valve

TM-106

Primary speed sensor

TM-57

Secondary speed sensor

TM-60

CVT fluid temperature sensor

TM-53

Transmission range switch

TM-50

Forward clutch

TM-18

Reverse brake

Torque converter

Name

Function

TCM

TM-22

Accelerator pedal position sensor

TM-98

TM-30

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SHIFT CONTROL SYSTEM

SHIFT CONTROL SYSTEM

System Diagram

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NOTE:

The gear ratio is set for each position separately.

System Description

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In order to select the gear ratio that can obtain the driving force in accordance with driver's intention and the

vehicle condition, TCM monitors the driving conditions, such as the vehicle speed and the throttle position,

selects the optimum gear ratio, and determines the gear change steps to the gear ratio. Then TCM sends the

command to the step motor, controls the inflow/outflow of line pressure from the primary pulley to determine

the position of the moving-pulley and controls the gear ratio.

“D” POSITION

Shifting over all the ranges of gear ratios from the lowest to the high-

est.

“M” POSITION

By moving the selector lever to + side or - side, the manual mode

switch is changed over, and shift change like M/T becomes possible

following the changing gear set line step by step.

“DS” POSITION

• When the selector lever is put in the manual shift gate side, the driver can drive more sporty than “D” posi-

tion.

• “DS” mode can be switched according to the following method.

AWDIA0741GB

SCIA1953E

SCIA1953E

SCIA4582E

SHIFT CONTROL SYSTEM

TM-31

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- When the selector lever is in the “D” position, shifting the selector lever to manual shift gate enables switch-

ing to “DS” mode.

- When in “DS” mode, shifting the selector lever to the main gate enables to cancel “DS” mode.

- After switching to manual mode with paddle shifter, switching to “DS” mode can not be enabled even when

the selector lever is shifted to the manual gate. (With paddle shifter)

DOWNHILL ENGINE BRAKE CONTROL (AUTO ENGINE BRAKE CONTROL)

When a downhill slope is detected with the accelerator pedal released, the engine brake will be strengthened

up by downshifting so as not to accelerate the vehicle more than necessary. 

ACCELERATION CONTROL

According to vehicle speed and a change of accelerator pedal angle, driver's request for acceleration and driv-

ing scene are judged.   This function assists improvement in the acceleration feeling by making the engine

speed proportionate to the vehicle speed. And a shift map that can gain a larger driving force is available for

compatibility of mileage with driveability.