Nissan Sentra manuals

Nissan Sentra B18 (2020-2025) Service Manual: Normal Operating Condition

Nissan Sentra B18 (2020-2025) Service Manual / Engine / Work Procedure (After Replacing Electric Throttle Control Actuator) / Symptom Diagnosis / Normal Operating Condition

Symptom Description

Symptom Description

FUEL CUT CONTROL (AT NO LOAD AND HIGH ENGINE SPEED)

If the status of that the engine speed is above 2,500 rpm under no load (at 0 km/h and the selector lever position is P or N) takes more than the specified time, fuel will be cut off after some time. The exact time when the fuel is cut off varies based on engine speed.Fuel cut will be operated until the engine speed falls below 2,000 rpm.

Note:

This function is different from deceleration control listed under direct injection gasoline system, Refer to System Description.

Fuel cut when the accelerator pedal is fully depressed.

When starts the engine with fully depressing the accelerator pedal, in order to eliminate the spark plug fouling, performs fuel cut while cranking and prevent the engine from starting. The fuel cut continues until the accelerator pedal is released.

NORMAL OPERATION OF IDLE START/STOP SYSTEM

1. When there is no prohibition cause in "Stop / Start prohibition cause data recorder".

Idle start/stop system may be deactivated for driver safety and Nissan Sentra vehicle protection by cooperation with other control units as normal operation. Refer to System Description.

Check displayed items on CONSULT following the table below to confirm relation between cause of Idle start/stop system deactivation and a customer complaint.

If "Driver operation", "S/S OFF switch ON”, "Driving pattern", "Fail-safe" are displayed in "Stop / Start prohibition cause data recorder" of "Work support" of CONSULT, investigate the cause in the table. Also, if the above four points are displayed as the main factors, please ignore the numbers displayed on the CONSULT screen.

CONSULT display

Detailed condition
Work support

Main factors

Stop/Start prohibit cause data recorder

Driving pattern

  • Not drive the Nissan Sentra vehicle at specified speed after turn ignition switch ON.

  • Not pass 5 seconds or more after engine restart.

  • Not drive the Nissan Sentra vehicle forward at specified speed after engine restart.

Driver operation

  • Shift lever position is at Neutral position and clutch pedal is not depressed. (M/T models)

  • Brake pedal is not depressed. (A/T models)

S/S OFF switch ON

Start/Stop OFF switch is ON.

Fail-safe

Fail safe of idle start/stop system is applied.

Select "Stop / Start error" in "Monitor Menu" of "DATA MONITOR" mode of CONSULT, and check if there is any "NG" item. Refer to Diagnosis Description.

Stop/Start engine restart cause data recorder

Driving pattern

  • M/T models

    - Clutch pedal is slightly depressed when shift lever position is at Neutral position.

    - Clutch pedal is fully depressed when shift lever position is at except Neutral position.

  • A/T models

    - Brake pedal is released.

    - Shift selector is switched from P or N position to D or R position.

    - Accelerator pedal is depressed.

    - Paddle shifter is operated when shift selector is at D, L, or M position.

    - Change gear position when shift selector is at M position.

S/S OFF switch ON

Start/Stop OFF switch is ON.

Fail-safe

Fail safe of idle start/stop system is applied.

Select "Stop / Start error" in "Monitor Menu" of "DATA MONITOR" mode of CONSULT, and check if there is any "NG" item. Refer to Diagnosis Description.
Stop/Start engine stall cause data recorder

Fail-safe

Fail safe of idle start/stop system is applied.

Select "Stop / Start error" in "Monitor Menu" of "DATA MONITOR" mode of CONSULT, and check if there is any "NG" item. Refer to Diagnosis Description.

Prevent jumping out

  • One of below condition is satisfied when engine is stopped and gear position is except N position without depressing clutch pedal.

    - Driving seat door is opened.

    - Driving seat belt is unfastened.

    - 5 minutes passes after other system requires restarting engine.

  • Clutch pedal is released cranking.

Hood open

Hood is opened.

*: Not applicable for this Nissan Sentra vehicle.

2. When there is a prohibition cause in the "Stop / Start prohibition cause data recorder"

Idle start/stop system may be deactivated for driver safety and Nissan Sentra vehicle protection by cooperation with other control units as normal operation. Refer to System Description.

Check displayed items on CONSULT following the table below to confirm relation between cause of Idle start/stop system deactivation and a customer complaint.

If "System condition" is displayed in "Stop/Start prohibition cause data recorder" of "Work support" of CONSULT, investigate the cause in the table. Also, please check the consultation screen for the explanation of the numbers displayed on the CONSULT screen.

CONSULT display

Detailed condition
Work support

Main factors

Condition item

Stop/Start prohibit cause data recorder

System condition

Hood condition

Open

Driving seat door

Open

Driving seat belt

Not fastened

ABS condition

Operating

Note:

If ABS system is activated, drive the Nissan Sentra vehicle at 12 km/h (7.5 MPH) or more after stop the vehicle.

VDC condition

Brake control system prohibits idle start/stop system operation.

Negative pressure cond

Below specified pressure

AC cond

Air conditioner system prohibits idle start/stop system operation.

Power supply cond

  • Power supply system prohibits idle start/stop system operation.

  • The battery is depleted.

  • Insufficient battery charge.

  • Check whether use battery designed for idle start/stop system. Refer to Battery.

IPA condition

Operating

ProPILOT condition

ProPILOT system prohibits idle start/stop system operation.

ABH condition

Automatic brake hold system prohibits idle start/stop system operation.(Brake fluid pressure is insufficient.)

I-KEY condition

Intelligent key is outside Nissan Sentra vehicle.

4WD mode

4WD mode is selected.

Delivery mode

ON

Note:

No activation in market

Continuous times

Starter becomes hot due to continuous operation.

ST RLY OFF exp

Starter relay which is connected to BCM is not turned off after engine restart.

DC/DC temp cond

Above specified temperature (CVT models)

Neutral SW OFF exp *

Neutral switch is not turned off after engine restart. (M/ T models)

ENG/TM condition

Engine or transmission conditions are not satisfied.

ST RLY condition

Starter relay which is connected to BCM is turned on.

Steering condition

Steer

Slope condition

Above specified degrees

Brake fluid pressure

Above specified pressure

Automatic emergency braking

Automatic emergency braking system prohibits idle start/stop system operation.

TOW mode

"TOW" mode is selected as the drive mode.

Drive mode

—

Stop/Start engine restart cause data recorder

System condition

VDC condition

Brake control system requires restarting engine.

Negative pressure cond

Below specified pressure.

AC cond

Air conditioner requires restarting engine.

Power supply cond

Power supply system requires restarting engine.

IPA condition

Operating

ProPILOT condition

ProPILOT system requires restarting engine.

ABH condition

 Automatic brake hold system requires restarting engine.

I-KEY condition

Intelligent key is outside Nissan Sentra vehicle.

Nissan Sentra Vehicle speed cond

Above specified speed.

ENG/TM condition

Engine or transmission are satisfied.

Steering condition

Steer (A/T models)

DC/DC temp cond

Above specified temperature (CVT models)

Driving seat door

Open

Driving seat belt

Unfastened

Automatic emergency braking

Automatic emergency braking system prohibits idle start/stop system operation.

TOW mode

"TOW" mode is selected as the drive mode.

Drive mode

—

*: Not applicable for this Nissan Sentra vehicle.

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