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Home >> Nissan-Datsun >> 2024 >> Sentra S >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System (2 Of 2) >> Symptom Diagnosis >> Normal Operating Condition >> Symptom Description
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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: SYMBOL 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 

When there is no prohibition cause in "Stop / Start prohibition cause data recorder". Idle start/stop system may be deactivated for driver safety and 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 vehicle at specified speed after turn ignition switch ON.
  • Not pass 5 seconds or more after engine restart.
  • Not drive the 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 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 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: SYMBOL If ABS system is activated, drive the 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 vehicle.
4WD mode 4WD mode is selected.
Delivery mode ON
NOTE: SYMBOL 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 vehicle.
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 vehicle.

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