Nissan Versa Sedan. Manual - part 845

TM-286

< SYSTEM DESCRIPTION >

[CVT: RE0F11A]

SYSTEM

LOCK-UP CONTROL : System Description

INFOID:0000000009268091

SYSTEM DIAGRAM

DESCRIPTION

• Controls for improvement of the transmission efficiency by engaging the torque converter clutch in the

torque converter and eliminating slip of the converter. Achieves comfortable driving with slip control of the

torque converter clutch. 

• The oil pressure feed circuit for the torque converter clutch piston chamber is connected to the torque con-

verter clutch control valve. The torque converter clutch control valve is switched by the torque converter

clutch solenoid valve with the signal from TCM. This controls the oil pressure circuit, which is supplied to the

torque converter clutch piston chamber, to the release side or engagement side. 

• If the CVT fluid temperature is low or the vehicle is in fail-safe mode due to malfunction, lock-up control is

prohibited. 

Lock-up engagement 

In lock-up engagement, the torque converter clutch solenoid valve makes the torque converter clutch control

valve locked up to generate the lock-up apply pressure. This pushes the torque converter clutch piston for

engagement. 

Lock-up release condition 

In lock-up release, the torque converter clutch solenoid valve makes the torque converter clutch control valve

non-locked up to drain the lock-up apply pressure. This does not engage the torque converter clutch piston. 

IDLE NEUTRAL CONTROL

JSDIA1865GB

SYSTEM

TM-287

< SYSTEM DESCRIPTION >

[CVT: RE0F11A]

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IDLE NEUTRAL CONTROL : System Description

INFOID:0000000009268092

SYSTEM DIAGRAM

DESCRIPTION

If a driver has no intention of starting the vehicle in D position, TCM operates the low brake solenoid valve and

controls the oil pressure of the low brake to be low pressure. Therefore, the low brake is in the release (slip)

status and the power transmission route of transaxle is the same status as the N position. In this way, the tran-

saxle is in idling status and load to the engine can be reduced to improve fuel economy. 

NOTE:

JSDIA2535GB

TM-288

< SYSTEM DESCRIPTION >

[CVT: RE0F11A]

SYSTEM

Provides idle neutral control when stop/start operation is not performed. 

Idle Neutral Control Start Condition

Idle neutral control is started when all of the following conditions are fulfilled. However, during idle neutral con-

trol, idle neutral control is stopped when any of the following conditions is not met or idle neutral control contin-

ues 30 seconds.

NOTE:

Stops or prohibits the idle neutral control when the TCM and ECM detect that the vehicle is in one of the fol-

lowing conditions. 

• Engine coolant temperature and CVT fluid temperature are the specified temperature or more, or the speci-

fied temperature or less.

• When a transaxle malfunction occurs.

• When the vehicle detects DTC and is in the fail-safe mode.

Idle Neutral Control Resume Condition

JPDIA1215GB

Driving environment 

: Flat road or road with mild gradient

Selector lever position

: “D” position

Vehicle speed

: 0 km/h (0 MPH)

Accelerator pedal position

: 0.0/8

Brake pedal

: Depressed

Engine speed

: Idle speed

Turn signal lamp/hazard signal lamp

: Not activated

SYSTEM

TM-289

< SYSTEM DESCRIPTION >

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When the idle neutral control finishes, if the vehicle is driven at more than the specified speed and the idle

neutral control start conditions are satisfied, the idle neutral control starts again. If the vehicle has a malfunc-

tion, the idle neutral control does not start.