Nissan Ariya: System

Nissan Ariya (FE0) 2023-2025 Service & Repair Manual / Brakes / Brake Control System :: E-Step / System Description / System

E-Step
E-Step Display
E-Step Warning

E-Step

System Description

The e-Step function enables the driver to slow the vehicle, by operating only the accelerator pedal.

Acceleration

Deceleration

Extremely low speed (creep)
When the e-Step function is ON, the regenerative brake is enhanced and the driver can adjust the Nissan Ariya vehicle speed by only depressing or returning the accelerator pedal.

NOTE:
e-Step function is controlled by receiving input signal from chassis control module, VCM and electrically-driven intelligent brake unit via CAN communication and each related switches.

SYSTEM DIAGRAM

Component	Signal description
VCM	Mainly transmits the following signals to chassis control module via CAN communication. Request drive torque signal e-Step status signal VCM malfunction signal Shift position signal Motor speed signal Estimate slop signal Accelerator pedal position signal Estimate drive torque signal Coast deceleration torque signal Traction motor torque signal Mainly receives the following signals from ABS actuator and electric unit (control unit) via CAN communication. Brake torque signal Mainly receives the following signals from chassis control module via CAN communication. Chassis control module malfunction signal Slop estimate permission signal Coast limit torque signal Mainly receives the following signals from ADAS control unit 2 via CAN communication. Intelligent cruise control signal ProPILOT status signal
ABS actuator and electric unit (control unit)	Mainly transmits the following signals to chassis control module via CAN communication. ABS operation signal ABS malfunction signal VDC operation signal VDC malfunction signal Steering angle sensor signal Front LH wheel speed signal Front RH wheel speed signal Rear LH wheel speed signal Rear RH wheel speed signal Deceleration control permission status signal Target brake force signal Mainly receives the following signals from chassis control module via CAN communication. Stop lamp ON request signal Mainly transmits the following signals to VCM via CAN communication. Electric parking brake operation status signal Regenerative request torque signal Mainly receives the following signals from VCM via CAN communication. Coast deceleration torque signal Accelerator pedal position signal Motor speed signal Shift position signal Estimate drive torque signal Regenerative possible torque signal
Combination meter	Mainly transmits the following signals to VCM via CAN communication. e-Step mode memory setting signal Mainly receives the following signals from VCM via CAN communication. e-Step mode display signal e-Step malfunction display signal e-Step memory status signal Mainly receives the following signals from BCM via CAN communication. Stop lamp ON status signal Mainly receives the following signals from chassis control module via CAN communication. Meter display signal
BCM	Mainly transmits the following signals to chassis control module via CAN communication. Stop lamp switch malfunction signal Mainly receives the following signals from ABS actuator and electric unit (control unit) via CAN communication. Stop lamp request signal
ADAS control unit 2	Mainly transmits the following signals to chassis control module and VCM via CAN communication. ProPILOT status signal
Chassis control module

OPERATION OUTLINE

e-Step function ON/OFF

When the power switch is ON, operating the e-Step switch switches the display of the information display of the combination meter.

NOTE:

The display colors when e-Step function ON / OFF are as follows:

e-Step function ON: Blue

e-Step function OFF: Gray

The mode of e-Step function can be memorized. Refer to "MODE MEMORY" below for mode memory.

OPERATION

Operation condition

e-Step function will not be activated in the followings conditions.
- When shift position is N or P.
- When any driver assistance systems are activated.
Acceleration and deceleration while driving
- The e-Step function enables the driver to accelerate and decelerate the Nissan Ariya vehicle by operating only the accelerator pedal.
- When the accelerator pedal is released, the Nissan Ariya vehicle decelerates with a stronger deceleration when the e-Step function is ON than when it is OFF.
  
  CAUTION:
  If the deceleration is not sufficient even after releasing the accelerator pedal, depress the brake pedal.
- When the Nissan Ariya vehicle speed decreases, the deceleration decreases, and at extremely low speed, it becomes a creep state as in the e-Step function OFF state.
  
  CAUTION:
  When decelerating or stopping the Nissan Ariya vehicle, depress the brake pedal.

Reverse

As same characteristics as e-Step function OFF.

TIMING CHART

When regenerative brake operate (regenerative brake force: sufficient)

	Returning accelerator pedal
	Timing of acceleration and deceleration (deceleration start).
	Stop lamp turned ON (exceed deceleration speed to turn ON stop lamp)
	Release accelerator pedal
	Stop lamp turned OFF
	Creep state
	Re-acceleration

When regenerative brake operate (regenerative brake force: sufficient) / Driver brake

	Returning accelerator pedal
	Timing of acceleration and deceleration (deceleration start).
	Stop lamp turned ON (exceed deceleration speed to turn ON stop lamp)
	Release accelerator pedal
	Creep state / Stop lamp turned OFF
	Depress brake pedal / Stop lamp turned ON
	Release brake pedal / Stop lamp turned OFF
	Re-acceleration

When regenerative brake operate (regenerative brake force: insufficient)

	Returning accelerator pedal
	Timing of acceleration and deceleration (deceleration start)
	Stop lamp turned ON (exceed deceleration speed to turn ON stop lamp)
	Friction (normal) brake assists deceleration because regenerative braking amount is insufficient
	Release accelerator pedal (maximum deceleration)
	Creep state / Stop lamp turned OFF
	Re-acceleration

When regenerative brake does not operate

	Returning accelerator pedal
	Timing of acceleration and deceleration (deceleration start)
	Stop lamp turned ON (exceed deceleration speed to turn ON stop lamp)
	Release accelerator pedal (maximum deceleration)
	Creep state / Stop lamp turned OFF
	Nissan Ariya Vehicle restart

RETAIN MODE

Allows driver to maintain the e-Step function setting ''ON'' or ''OFF''.
When mode memory turned ON, previous e-Step function setting (ON/OFF) will be kept.
The mode is switched on the Nissan Ariya vehicle information display of the combination meter.

Circuit Diagram

Refer to Circuit Diagram.

Fail-safe

Refer to Fail-safe.

Operation

The e-Step function turns ON or OFF each time the e-Step switch is pushed. The e-Step indicator in the information display shows the status of the e-Step function.

CAUTION:

If OFF the power switch and then put the vehicle in READY again, the e-Step function setting will be turned OFF. If want to keep the e-Step function setting when return to READY, turn ON the mode memory setting on the information display of the combination meter.

NOTE:

The degree of deceleration changes when the e-Step function is switched ON / OFF.

NOTE:

The relationship between the e-Step function and the information display of the combination meter, Refer to System Description.