Nissan Murano: System / Hill Start Assist Function

Nissan Murano (Z52) 2015-2024 Service Manual / Brakes / Brake Control System :: Vdc/tcs/abs / System Description / System / Hill Start Assist Function

System Description

SYSTEM DIAGRAM

This function maintains brake fluid pressure so that the vehicle does not move backward even if brake pedal is released to depress accelerator pedal to start the Nissan Murano vehicle while it is stopped on an uphill slope by depressing brake pedal.
This function operates when the Nissan Murano vehicle is in stop status on a uphill slope of slope ratio 10% or more and selector lever is in a position other than P or N.
Hill start assist function is only for the start aid. It maintains the brake fluid pressure for approximately 2 seconds after releasing the brake pedal and then decreases the pressure gradually. If the Nissan Murano vehicle can start by the accelerator operation, the brake is released automatically and a smooth start can be performed.
Fail-safe function is adopted. When a malfunction occurs in hill start assist function, the control is suspended for VDC function, TCS function, brake assist function and hill start assist function. The Nissan Murano vehicle status becomes the same as models without VDC function, TCS function, brake assist function and hill start assist function. However, ABS function and EBD function are operated normally. Refer to Fail-Safe.

SIGNAL TRANSMISSION FUNCTION LIST

Major signal transmission between each unit via communication lines is shown in the following table:

Component	Signal description
ECM	Mainly transmits the following signals to ABS actuator and electric unit (control unit) via CAN communication: Accelerator pedal position signal Brake pedal position signal Engine speed signal Engine torque signal Mainly receives the following signal from ABS actuator and electric unit (control unit) via CAN communication: Engine torque request signal
TCM	Mainly transmits the following signal to ABS actuator and electric unit (control unit) via CAN communication: Current gear position signal
Combination meter	Mainly receives the following signals from ABS actuator and electric unit (control unit) via CAN communication: Brake fluid level switch signal Parking brake switch signal Mainly receives the following signals from ABS actuator and electric unit (control unit) via CAN communication: VDC warning lamp signal VDC OFF indicator lamp signal

Component

Signal description

ECM

Mainly transmits the following signals to ABS actuator and electric unit (control unit) via CAN communication:

Accelerator pedal position signal
Brake pedal position signal
Engine speed signal
Engine torque signal

Mainly receives the following signal from ABS actuator and electric unit (control unit) via CAN communication:

Engine torque request signal

TCM

Mainly transmits the following signal to ABS actuator and electric unit (control unit) via CAN communication:

Current gear position signal

Combination meter

Mainly receives the following signals from ABS actuator and electric unit (control unit) via CAN communication:

Brake fluid level switch signal
Parking brake switch signal

Mainly receives the following signals from ABS actuator and electric unit (control unit) via CAN communication:

VDC warning lamp signal
VDC OFF indicator lamp signal

Brake Assist Function

System Description SYSTEM DIAGRAM When the driver brakes hard in an emergency, the stopping distance is reduced by increasing brake fluid pressure. Fail-safe function is adopted...

Warning/indicator/chime List

Warning Lamp/Indicator Lamp Name Design Layout/Function ABS warning lamp or For function: Refer to Component Function Check. For layout: Refer to Design...

Other information:

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