Nissan Sentra B18 (2020-2025) Service Manual: System

Nissan Sentra B18 (2020-2025) Service Manual / Transmission & Driveline / Transaxle & Transmission :: Cvt: Re0f15a / System Description / System

Cvt Control System

System Description

System Description

SYSTEM DIAGRAM

Name	Function
TCM	TCM
Transmission range switch	Transmission Range Switch
Primary speed sensor	Primary Speed Sensor
secondary speed sensor	Secondary Speed Sensor
Input speed sensor	Input Speed Sensor
Electric oil pump	Electric Oil Pump
CVT fluid temperature sensor	CVT Fluid Temperature Sensor
Primary pressure sensor	Primary Pressure Sensor
Secondary pressure sensor	Secondary Pressure Sensor
Line pressure sensor	Line Pressure Sensor
Primary pressure solenoid valve	Primary Pressure Solenoid Valve
Secondary pressure solenoid valve	Secondary Pressure Solenoid Valve
Select solenoid valve	Select Solenoid Valve
Torque converter clutch solenoid	Torque Converter Clutch Solenoid
Line pressure solenoid valve	Line Pressure Solenoid Valve
Drive sport mode switch	Drive Sport Mode Switch
Shift position indicator	Shift Position Indicator
ECM	Mainly transmits the following signal to TCM via CAN communication. Engine and CVT integrated control signal Note: General term for the communication (torque-down permission, torque-down request, etc.) exchanged between the ECM and TCM. Engine speed signal Engine coolant temperature signal Accelerator pedal position signal Closed throttle position signal Mainly receives the following signal from TCM via CAN communication. Malfunctioning indicator lamp signal Stop/start enable signal
BCM	Mainly transmits the following signal to TCM via CAN communication. Stop lamp switch signal Drive sport mode switch signal
ABS actuator and electric unit (control unit)	Mainly transmits the following signals to TCM via CAN communication. ABS operation signal TCS operation signal VDC operation signal ABS malfunction signal Nissan Sentra Vehicle speed signal Decel G sensor signal
Combination meter	Mainly receives the following signals from TCM via CAN communication. Shift position indicator signal Drive sport mode indicator signal CVT system warning signal

MAIN CONTROL CONTENTS OF TCM

Controls	Reference
Line pressure control	System Description
Shift control	System Description
Select control	System Description
Lock-up control	System Description
ECO mode control	ECO Mode Switch
STOP START SYSTEM	System Description
Fail-safe	Fail-safe
Self-diagnosis function	CONSULT Function
Communication function with CONSULT	CONSULT Function

LIST OF CONTROL ITEMS AND INPUT/OUTPUT

Control Item		Line pressure control	Shift control	Select control	Lock-up control	Fail-safe function*
Input	Engine torque signal (CAN communication)	×	×	×	×	×
	Engine speed signal (CAN communication)	×	×	×	×	×
	Accelerator pedal position signal (CAN communication)	×	×	×	×
	Closed throttle position signal (CAN communication)	×	×		×
	Stop lamp switch signal (CAN communication)	×	×	×	×
	Primary pressure sensor	×				×
	Secondary pressure sensor	×	×			×
	Line pressure sensor	×				×
	CVT fluid temperature sensor	×	×	×	×	×
	Primary speed sensor	×	×	×	×	×
	Secondary speed sensor	×	×		×	×
	Input speed sensor	×	×	×	×	×
	Transmission range switch	×	×	×	×	×
	ECO mode switch signal (CAN communication)		×
	Drive sport mode switch signal (CAN communication)		×
Output	Line pressure solenoid valve	×	×	×		×
	Primary pressure solenoid valve	×	×			×
	Torque converter clutch solenoid				×	×
	Secondary pressure solenoid valve	×	×			×
	Select solenoid valve			×		×
	Electric oil pump		×			×
	Shift position indicator (CAN communication)			×
	ECO mode indicator lamp signal (CAN communication)		×
	Drive sport mode indicator signal (CAN communication)		×

*: If these input/output signals show errors, TCM activates the fail-safe function.

Fail-Safe

Fail-safe

Fail-safe function

TCM has a fail-safe mode. The mode functions so that operation can be continued even if the signal circuit of the main electronically controlled input/output parts is damaged.

If the Nissan Sentra vehicle shows following behaviors including “poor acceleration”, a malfunction of the applicable system is detected by TCM and the Nissan Sentra vehicle may be in a fail-safe mode. At this time, check the DTC code and perform inspection and repair according to the malfunction diagnosis procedures.

DTC		Nissan Sentra Vehicle behavior	Conditions of vehicle
P0604	00	Selector shock is large Start is slow Acceleration is slow Lock-up is not performed Stop/start system prohibited	—
P0605	00	Selector shock is large Start is slow Acceleration is slow Lock-up is not performed Stop/start system prohibited	—
P0606	00	Selector shock is large Start is slow Acceleration is slow Lock-up is not performed Stop/start system prohibited	—
P060A	00	Selector shock is large Start is slow Acceleration is slow Lock-up is not performed Stop/start system prohibited	—
P062F	00	Not changed from normal driving Stop/start system prohibited	—
P0705	00	Shift position indicator on combination meter is not displayed Stop/start system prohibited	—
P0706	00	Shift position indicator on combination meter is not displayed Stop/start system prohibited	—
P0711	00	Start is slow Acceleration is slow Stop/start system prohibited	Engine coolant temperature when engine start: Temp. ≥ 10°C (50°F)
		Selector shock is large Start is slow Acceleration is slow Stop/start system prohibited	Engine coolant temperature when engine start: −35°C (−31°F) ≤ Temp. < 10°C (50°F)
		Selector shock is large Start is slow Acceleration is slow Stop/start system prohibited	Engine coolant temperature when engine start: Temp. <−35°C (−31°F)
P0712	00	Start is slow Acceleration is slow Stop/start system prohibited	Engine coolant temperature when engine start: Temp. ≥ 10°C (50°F)
		Selector shock is large Start is slow Acceleration is slow Stop/start system prohibited	Engine coolant temperature when engine start: −35°C (−31°F) ≤ Temp. < 10°C (50°F)
		Selector shock is large Start is slow Acceleration is slow Stop/start system prohibited	Engine coolant temperature when engine start: Temp. <−35°C (−31°F)
P0713	00	Start is slow Acceleration is slow Stop/start system prohibited	Engine coolant temperature when engine start: Temp. ≥ 10°C (50°F)
		Selector shock is large Start is slow Acceleration is slow Stop/start system prohibited	Engine coolant temperature when engine start: −35°C (−31°F) ≤ Temp. < 10°C (50°F)
		Selector shock is large Start is slow Acceleration is slow Stop/start system prohibited	Engine coolant temperature when engine start: Temp. <−35°C (−31°F)
P0715	00	Lock-up is not performed Stop/start system prohibited	—
P0716	00	Lock-up is not performed Stop/start system prohibited	—
P0717	00	Lock-up is not performed Stop/start system prohibited	—
P0718	00	Lock-up is not performed	—
P0740	00	Start is slow Acceleration is slow Lock-up is not performed Stop/start system prohibited	—
P0741	00	Start is slow Acceleration is slow Lock-up is not performed	—
P0742	00	Start is slow Acceleration is slow Engine stops when shift to “D” position during stopping the Nissan Sentra vehicle. Stop/start system prohibited	—
P0746	00	Lock-up is not performed Stop/start system prohibited	—
P0747	00	Lock-up is not performed Stop/start system prohibited	—
P0776	00	Selector shock is large Start is slow Acceleration is slow Lock-up is not performed Stop/start system prohibited	Nissan Sentra Vehicle speed < 40 km/h (25 MPH) or Input speed < 1300 rpm
P0776	00	Selector shock is large Start is slow Acceleration is slow Stop/start system prohibited	Other then the above
P0777	00	Selector shock is large Lock-up is not performed Stop/start system prohibited	Nissan Sentra Vehicle speed < 40 km/h (25 MPH) or Input speed < 1300 rpm
P0777	00	Selector shock is large Stop/start system prohibited	Other then the above
P0791	00	Lock-up is not performed Stop/start system prohibited	—
P0792	00	Lock-up is not performed Stop/start system prohibited	—
P0793	00	Lock-up is not performed Stop/start system prohibited	—
P0794	00	Not changed from normal driving	—
P0796	00	Selector shock is large Start is slow Acceleration is slow Lock-up is not performed Nissan Sentra Vehicle speed is not increased Stop/start system prohibited	Nissan Sentra Vehicle speed < 40 km/h (25 MPH) or Input speed < 1300 rpm
P0796	00	Selector shock is large Start is slow Acceleration is slow Nissan Sentra Vehicle speed is not increased Stop/start system prohibited	Other then the above
P0797	00	Selector shock is large Start is slow Acceleration is slow Lock-up is not performed Stop/start system prohibited	Nissan Sentra Vehicle speed < 40 km/h (25 MPH) or Input speed < 1300 rpm
P0797	00	Selector shock is large Start is slow Acceleration is slow Stop/start system prohibited	Other then the above
P07BF	00	Lock-up is not performed Stop/start system prohibited	—
P07C0	00	Lock-up is not performed Stop/start system prohibited	—
P07C1	00	Lock-up is not performed Stop/start system prohibited	—
P07C2	00	Lock-up is not performed Stop/start system prohibited	—
P07C5	00	Lock-up is not performed Stop/start system prohibited	—
P07C6	00	Lock-up is not performed Stop/start system prohibited	—
P0845	00	Not changed from normal driving Stop/start system prohibited	—
P0846	00	Not changed from normal driving Stop/start system prohibited	—
P0847	00	Not changed from normal driving Stop/start system prohibited	—
P0848	00	Not changed from normal driving Stop/start system prohibited	—
P084A	00	Not changed from normal driving Stop/start system prohibited	—
P084B	00	Not changed from normal driving Stop/start system prohibited	—
P084C	00	Not changed from normal driving Stop/start system prohibited	—
P084D	00	Not changed from normal driving Stop/start system prohibited	—
P0863	00	Selector shock is large Start is slow Acceleration is slow Lock-up is not performed Stop/start system prohibited	—
P0870	00	Not changed from normal driving Stop/start system prohibited	—
P0871	00	Not changed from normal driving Stop/start system prohibited	—
P0872	00	Not changed from normal driving Stop/start system prohibited	—
P0873	00	Not changed from normal driving Stop/start system prohibited	—
P0890	00	Selector shock is large Start is slow Acceleration is slow Lock-up is not performed Nissan Sentra Vehicle speed is not increased Stop/start system prohibited	—
P0960	00	Lock-up is not performed Stop/start system prohibited	—
P0961	00	Start is slow Acceleration is slow Lock-up is not performed Nissan Sentra Vehicle speed is not increased Stop/start system prohibited	When a malfunction occurs on the low oil pressure side
P0961	00	Start is slow Acceleration is slow Lock-up is not performed Stop/start system prohibited	When a malfunction occurs on the high oil pressure side
P0962	00	Lock-up is not performed Stop/start system prohibited	—
P0963	00	Lock-up is not performed Stop/start system prohibited	—
P0964	00	Selector shock is large Start is slow Acceleration is slow Lock-up is not performed Stop/start system prohibited	Nissan Sentra Vehicle speed < 40 km/h (25 MPH) or Input speed < 1300 rpm
P0964	00	Selector shock is large Start is slow Acceleration is slow Stop/start system prohibited	Other then the above
P0966	00	Selector shock is large Start is slow Acceleration is slow Lock-up is not performed Stop/start system prohibited	Nissan Sentra Vehicle speed < 40 km/h (25 MPH) or Input speed < 1300 rpm
P0966	00	Selector shock is large Start is slow Acceleration is slow Stop/start system prohibited	Other then the above
P0967	00	Selector shock is large Start is slow Acceleration is slow Lock-up is not performed Stop/start system prohibited	Nissan Sentra Vehicle speed < 40 km/h (25 MPH) or Input speed < 1300 rpm
P0967	00	Selector shock is large Start is slow Acceleration is slow Stop/start system prohibited	Other then the above
P0968	00	Start is slow Acceleration is slow Lock-up is not performed Stop/start system prohibited	—
P0970	00	Start is slow Acceleration is slow Lock-up is not performed Stop/start system prohibited	Nissan Sentra Vehicle speed < 40 km/h (25 MPH) or Input speed < 1300 rpm
P0970	00	Start is slow Acceleration is slow Stop/start system prohibited	Other then the above
P0971	00	Start is slow Acceleration is slow Lock-up is not performed Stop/start system prohibited	Nissan Sentra Vehicle speed < 40 km/h (25 MPH) or Input speed < 1300 rpm
P0971	00	Start is slow Acceleration is slow Stop/start system prohibited	Other then the above
P1588	00	Not changed from normal driving	—
P159C	00	Not changed from normal driving	—
P159D	00	Not changed from normal driving	—
P17F0	07	Not changed from normal driving	—
P17F1	07	Not changed from normal driving	—
P17F2	07	Not changed from normal driving	—
P187E	09	Not changed from normal driving	—
P188E	00	Not changed from normal driving Stop/start system prohibited	—
P1AE0	61	Shift position indicator on combination meter is not displayed	—
P271E	00	Not changed from normal driving	—
P2765	00	Lock-up is not performed Stop/start system prohibited	—
P2766	00	Lock-up is not performed Stop/start system prohibited	—
P2767	00	Lock-up is not performed Stop/start system prohibited	—
P2768	00	Not changed from normal driving	—
P2769	00	Start is slow Acceleration is slow Lock-up is not performed Stop/start system prohibited	—
P2770	00	Start is slow Acceleration is slow Engine stops when shift to “D” position during stopping the Nissan Sentra vehicle. Stop/start system prohibited	—
P27A1	00	Not changed from normal driving Stop/start system prohibited	—
P27A3	00	Not changed from normal driving Stop/start system prohibited	—
P27A4	00	Not changed from normal driving Stop/start system prohibited	—
P27A6	00	Start is slow Acceleration is slow Lock-up is not performed Stop/start system prohibited	—
P27B3	00	Powertrain becomes neutral Stop/start system prohibited	—
P27B5	00	shock at step-shift	—
P27EB	00	Shift position indicator on combination meter is not displayed Stop/start system prohibited	—
P27EC	00	Shift position indicator on combination meter is not displayed Stop/start system prohibited	—
P27EF	00	Shift position indicator on combination meter is not displayed Stop/start system prohibited	—
P27F0	00	Shift position indicator on combination meter is not displayed Stop/start system prohibited	—
P2808	00	Selector shock is large Start is slow Acceleration is slow Nissan Sentra Vehicle speed is not increased Stop/start system prohibited	—
P2809	00	Selector shock is large Idle stop is not performed Stop/start system prohibited	—
P2812	00	Selector shock is large Stop/start system prohibited	—
P2814	00	Selector shock is large Stop/start system prohibited	—
P2815	00	Powertrain becomes neutral Stop/start system prohibited	—
P28ED	00	Not changed from normal driving Stop/start system prohibited	—
P28EE	00	Not changed from normal driving Stop/start system prohibited	—
U0073	00	Selector shock is large Start is slow Acceleration is slow Lock-up is not performed Stop/start system prohibited	—
U007A	00	Selector shock is large Start is slow Acceleration is slow Lock-up is not performed Stop/start system prohibited	—
U0100	00	Selector shock is large Start is slow Acceleration is slow Lock-up is not performed Stop/start system prohibited	—
U0115	00	Selector shock is large Start is slow Acceleration is slow Lock-up is not performed Stop/start system prohibited	—
U0122	00	Not changed from normal driving	—
U0140	00	Not changed from normal driving	—
U0287	00	Not changed from normal driving Stop/start system prohibited	—
U0300	00	Selector shock is large Start is slow Acceleration is slow Lock-up is not performed	—
U1112	24	Not changed from normal driving	—
U2140	87	Selector shock is large Start is slow Acceleration is slow Lock-up is not performed	—
U2148	87	Not changed from normal driving	—
U214F	87	Not changed from normal driving	—
U2153	87	Not changed from normal driving	—
U215B	87	Not changed from normal driving	—
U2240	87	Selector shock is large Start is slow Acceleration is slow Lock-up is not performed	—
U2252	87	Not changed from normal driving	—
U2276	87	Not changed from normal driving	—

Protection Control

Protection Control

The TCM becomes the protection control status temporarily to protect the safety when the safety of TCM and transmission is lost. It automatically returns to the normal status if the safety is secured.

The TCM has the following protection control.

CONTROL FOR WHEEL SPIN

Control

When a wheel spin is detected, the engine output and gear ratio are limited and the line pressure is increased.

Limits engine output when a wheel spin occurs in any of right and left drive wheels.

Nissan Sentra Vehicle behavior in control

If the accelerator is kept depressing during wheel spin, the engine revolution and Nissan Sentra vehicle speed are limited to a certain degree.

Normal return condition

Wheel spin convergence returns the control to the normal control.

TORQUE IS REDUCED WHEN DRIVING WITH THE REVERSE GEAR

Control	Engine output is controlled according to a Nissan Sentra vehicle speed while reversing the vehicle.
Vehicle behavior in control	Power performance may be lowered while reversing the Nissan Sentra vehicle.
Normal return condition	Torque returns to normal by positioning the shift position in a range other than “R” position.

CONTROL WHEN FLUID TEMPERATURE IS HIGH

Control	When the CVT fluid temperature is high, the gear shift permission maximum revolution and the maximum torque are reduced than usual to prevent increase of the oil temperature.
Nissan Sentra Vehicle behavior in control	Power performance may be lowered, compared to normal control.
Normal return condition	The control returns to the normal control when CVT fluid temperature is lowered.

REVERSE PROHIBIT CONTROL

Control	The reverse brake is controlled to avoid becoming engaged when the shift position is set in “R” position while driving in forward direction at more than the specified speed.
Nissan Sentra Vehicle behavior in control	If the shift position is put at “R” position when driving with the forward gear, the gear becomes neutral, not reverse.
Normal return condition	The control returns to normal control when the Nissan Sentra vehicle is driven at low speeds. (The reverse brake becomes engaged.)

Line Pressure Control

System Description

System Description

SYSTEM DIAGRAM

DESCRIPTION

Highly accurate line pressure control and secondary pressure control reduces friction for improvement of fuel economy.

Normal Oil Pressure Control

Appropriate line pressure and secondary pressure suitable for driving condition are determined based on the accelerator pedal position, engine speed, primary pulley (input) speed, secondary pulley (output) speed, Nissan Sentra vehicle speed, input torque, stop lamp switch signal, transmission range switch signal, lock-up signal, power voltage, target shift ratio, oil temperature, oil pressure, and drive sport mode switch signal.

Secondary Pressure Feedback Control

In normal oil pressure control and oil pressure control in shifting, highly accurate secondary pressure is determined by detecting the secondary pressure using an oil pressure sensor and by feedback control.

Shift Control

System Description

System Description

SYSTEM DIAGRAM

DESCRIPTION

To select the gear ratio that can give the driving force to meet driver's intent or Nissan Sentra vehicle situation, the vehicle driving condition such as vehicle speed or accelerator pedal position is detected and the most appropriate gear ratio is selected and the shifting method before reaching the speed is determined. The information is output to the primary pressure solenoid valve and secondary pressure solenoid valve to control the line pressure input/output to the pulley, to determine the pulley (movable pulley) position and to control the gear position.

Shift Position Function

D Position (Normal)

Gear shifting is performed in all shifting ranges from the lowest to the highest gear ratio.

D Position (Drive sport mode)

The gear ratio is generally high by limiting the shifting range on the high side, and this always generates a large driving power.
L Position

By limiting the shifting range only to the lowest of the gear ratio, a large driving force and engine brake are obtained.

Hill Climbing And Descending Control

If a downhill is detected with the accelerator pedal is released, the system performs downshift to increase the engine brake force so that Nissan Sentra vehicle may not be accelerated more than necessary. If a climbing hill is detected, the system improves the acceleration performance in re-acceleration by limiting the gear shift range on the high side.

Note:

For engine brake control on a downhill, the control can be stopped with CONSULT.

Control In Acceleration

From change of the Nissan Sentra vehicle speed or accelerator pedal position, the acceleration request level of the driver or driving scene is evaluated. In start or acceleration during driving, the gear shift characteristics with linearity of revolution increase and Nissan Sentra vehicle speed increase are gained to improve the acceleration feel.

Select Control

System Description

System Description

SYSTEM DIAGRAM

DESCRIPTION

Based on accelerator pedal angle, engine speed, primary pulley speed, and the input speed, the optimum operating pressure is set to reduce impact of a shift operation while shifting from “N” (“P”) to “D” (“R”) position.

Lock-Up Control

System Description

System Description

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 converter clutch control valve. The torque converter clutch control valve is switched by the torque converter clutch solenoid 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 Nissan Sentra 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 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 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.

Eco Mode Control

System Description

System Description

Driving mode that selects the shift schedule with priority on fuel economy which gives low engine revolution.
The gear shift line is not changed with the control mode change for the following conditions:
- When the shift position is at D position and overdrive is OFF.
For details on ECO mode control, refer to System Description.

FAIL-SAFE

If a malfunction occurs in the system of CVT during ECO mode, the ECO mode indicator lamp turns OFF and the control switches to the normal mode control.

Stop/start System

System Description

System Description

STOP/START OPERATION PERMISSION CONDITION EVALUATED BY TCM

When TCM detects the vehicle status and stop/start system operation OK is determined, stop/start enable signal is sent to ECM through CAN communication.

Item	Description	Permission conditions
CVT fluid temperature sensor	CVT fluid temperature	18℃～113℃ (64.4～235.4℉)
Electric oil pump	Malfunction	Normal
Pully ratio	—	1.3 or more

TIME CHART

Information Display (combination Meter)

Cvt System Warning

CVT System Warning

DESIGN/PURPOSE

CVT Malfunction Warning (Type A)

This warning is displayed when CVT system/function is not normal.

Design	Warning Message
	CVT (AT) Malfunction Service now

Design

Warning Message

CVT (AT) Malfunction

Service now

CVT Malfunction Warning (Type B)

This warning is displayed when CVT system/function is not normal.

Design	Warning Message
	CVT (AT) Malfunction Stop safety

Design

Warning Message

CVT (AT) Malfunction

Stop safety

CVT Malfunction Warning (Type C)

This warning is displayed when CVT system/function is not normal.

Design	Warning Message
	Service CVT Power reduced

Design

Warning Message

Service CVT

Power reduced

CVT Hot Warning

This warning is displayed when CVT fluid temperature is high.

Design	Warning Message
	CVT (AT) hot Power reduced

Design

Warning Message

CVT (AT) hot

Power reduced

CVT Stop The Nissan Sentra Vehicle Warning

This warning is displayed when CVT system judges the vehicle is reversed on an uphill road with the shift position in D (Drive), or moved forward on a downhill road with the shift position in R (Reverse).

Design		Warning Message
		Stop the Nissan Sentra vehicle

SYNCHRONIZATION WITH MASTER WARNING LAMP

Applicable

SYNCHRONIZATION WITH WARNING BUZZER

Not applicable

SYSTEM DIAGRAM

SIGNAL PATH

The TCM judges the condition of CVT system system/function based on the signal received from each sensor and the operating state of each actuator.
When the displaying conditions of the CVT system warning are satisfied, TCM transmits a CVT system warning signal to the combination meter via CAN communication.
The combination meter displays the CVT system warning according to the CVT system warning signal.

WARNING CONDITION

CVT Malfunction Warning Type A, Type B and Type C

When CVT system/function malfunction is detected at ignition ON.

Note:

For DTCs that the CVT system warning displays, refer to DTC Index.

CVT Hot Warning

When CVT fluid temperature becomes high and CVT protection control operates.

Stop The Nissan Sentra Vehicle Warning

When the CVT system judges the vehicle is reversed on an uphill road with the shift position in D (Drive), or moved forward on a downhill road with the shift position in R (Reverse).

WARNING CANCEL CONDITION

CVT Malfunction Warning Type A, Type B and Type C

Erase DTC

CVT Hot Warning

When CVT fluid temperature becomes low and CVT protection control stops.

Stop The Nissan Sentra Vehicle Warning

When the CVT system does not judge the vehicle is reversed on an uphill road with the shift position in D, or moved forward on a downhill road with the shift position in R.

Shift Position Indicator

Shift Position Indicator

PURPOSE

The shift position indicator displays the shift position of transaxle.

SYSTEM DIAGRAM

SIGNAL PATH

The TCM judges the shift position by the transmission range switch signal.
The TCM transmits the shift position signal to the combination meter via CAN communication.
The combination meter displays the shift position indicator on the information display, according to the signal.

INDICATOR OPERATING CONDITION

Ignition switch ON

INDICATOR CANCEL CONDITION

Ignition switch OFF

Drive Sport Mode Indicator

Drive Sport Mode Indicator

DESIGN/PURPOSE

Drive sport mode indicator informs the driver that the CVT control is in drive sport mode.

SYSTEM DIAGRAM

SIGNAL PATH

TCM judges the shift position by the transmission range switch.
BCM transmits a drive sport mode switch signal to the TCM.
TCM transmits a drive sport mode indicator signal to the combination meter when the drive sport mode switch is pressed in the D position.

INDICATOR OPERATING CONDITION

When all of the following conditions are satisfied:

Shift position: D position
Drive sport mode switch is pressed while drive sport mode indicator is not displayed.

INDICATOR CANCEL CONDITION

When any of the following conditions are satisfied:

Shift position: Except D position
Drive sport mode switch is pressed while drive sport mode indicator is displayed.

Warning/indicator/chime List

Warning Lamp/indicator Lamp

Warning Lamp/Indicator Lamp

Item	Design	Layout / Function
Malfunction indicator lamp (MIL)		Regarding the function, refer to Malfunction Indicator Lamp (MIL).

Warning/indicator (on Information Display)

Warning/Indicator (On Information Display)

Item	Function
CVT system warning	Refer to CVT System Warning.
Shift position indicator	Refer to Shift Position Indicator.
Drive sport mode indicator	Refer to Drive Sport Mode Indicator.

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