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Home >> Infiniti >> 2021 >> QX50 Autograph, FWD >> Repair and Diagnosis >> Accessories & Equipment >> Cruise Control Systems >> Cruise Control System >> System Description >> System >> System Description >> Operation Description

Operation Description

Quickly push (less than 1.5 seconds) and release the MAIN switch ON.

The MAIN switch indicator, set distance indicator, own vehicle indicator, and set vehicle speed indicator come on and ICC system is set to a standby state.

ADAS control unit performs the control as per the following:

Constant speed

Comparing the set vehicle speed with the current vehicle speed, transmit the command to ECM via CAN communication to reach the set vehicle speed, and controls the electric throttle control actuator

Deceleration

When a vehicle ahead (slower than driver set vehicle speed) appears or when a vehicle ahead slows down, the system controls the electric throttle control actuator into the close direction and decelerates the vehicle. If greater deceleration is necessary, the system transmits the brake fluid pressure control signal to the ABS actuator and electric unit (control unit) via CAN communication and operates the brake

Following

The system controls the electric throttle control actuator and the brake fluid pressure to keep the proper distance between the vehicles according to the vehicle speed change of the vehicle ahead

Acceleration

When a vehicle ahead is not detected because of it changes lanes or own vehicle changes lanes during the following driving, the system controls the electric throttle control actuator in the open direction and accelerates the vehicle to the set vehicle speed slowly

Set Condition 

Under a standby state, pushing down the SET - switch will start system control.

If the system is canceled by conditions 1-6 below, the system will resume control at the last set cruising speed by pushing up the RESUME + switch.

NOTE:
  • When the SET - switch is pushed under the following conditions, the system cannot be set and the set vehicle speed indicator will blink for approximately 2 seconds.
    • When traveling below 30 km/h (20 MPH) and the vehicle ahead is not detected.
    • When the selector lever is not in the "D" position or manual mode.
    • When the parking brakes are applied.
    • When the brakes are operated by the driver.
  • When the SET - switch is pushed under the following conditions, the system cannot be set and a warning chime will sound and displays that causes in combination meter (information display).
    • When the VDC is OFF. (To use the ICC system, turn ON the VDC system, push the MAIN switch to turn OFF the ICC system and reset the ICC system by pushing the MAIN switch again).
    • When VDC (including the TCS) operates.
    • When the wheel is slipping. (To use the ICC system, make sure the wheels are no longer spinning, push the MAIN switch to turn OFF the ICC system and reset the ICC system by pushing the MAIN switch again).
    • When the drive mode select switch is in SNOW position. (To use the system, turn OFF the snow mode, push the MAIN switch to turn OFF the ICC system and reset the ICC system by pushing the MAIN switch again).

Cancel Conditions 

  1. When CANCEL switch is pressed.
  2. When brake pedal is depressed.
  3. When the vehicle ahead is not detected below the speed of 25 km/h (15 MPH).
  4. When the selector lever is not in the "D" position or manual mode.
  5. When the parking brakes are applied.
  6. When the system judges the vehicle is at standstill.
  7. When VDC (including the TCS) operates.
  8. When the MAIN switch is turned OFF.
  9. When a wheel slips.
  10. When the VDC is turned OFF.
  11. When the system malfunction occurs.
  12. When the drive mode select switch is in SNOW position.


When the ProPILOT Assist system is off, pressing the main switch of the ProPILOT Assist system switch (less than 1.5 seconds) displays the state of the ProPILOT Assist system is off and enters the set standby state.

ADAS control unit performs the control as per the following:

In control (Straight road)

The Front camera unit detects the lane marker of the driving lane and transmits the lane marker detection signal to ADAS control unit via CAN communication. Based on the lane marker detection signal, the ADAS control unit sends a command to the EPS control unit via CAN communication to support the steering so that the vehicle maintains the driving lane.

In control (curved road)

The Front camera unit detects the lane marker of the driving lane and transmits the lane marker detection signal to ADAS control unit via CAN communication. Based on the lane marker detection signal, the ADAS control unit sends commands to the EPS control unit via CAN communication to support the steering according to the curve, so that the vehicle maintains the driving lane.

Waiting for control

When the ADAS control unit receives the turn signal indicator light signal from the BCM via the CAN communication, temporarily releases the handle assist function.

Control return

When the lane change is completed and the lane marker detection signal is received from the Front camera unit by the CAN communication, the ADAS control unit restores the handle support function.


To turn ON the conventional (fixed speed) cruise control mode, push and hold the MAIN switch for longer than approximately 1.5 seconds when ICC system is OFF.

When pushing the MAIN switch ON, the ICC system display and the MAIN switch indicator are displayed on the information display.

After hold the MAIN switch ON for longer than approximately 1.5 seconds, the ICC system display goes out.

The MAIN switch indicator stays lit and brings the system to standby state.

NOTE: To turn on the vehicle-to-vehicle distance control mode again, turn OFF the system and quickly push (less than 1.5 seconds) the MAIN switch.

ADAS control unit performs the control as per the following:

Constant speed

Comparing the set vehicle speed with the current vehicle speed, transmits the command to ECM via CAN communication to reach the set vehicle speed, and controls the electronic throttle control actuator.

SET CONDITION 

When the system is under a standby state and the vehicle speed is between approximately 40 km/h (25 MPH) and 144 km/h (90 MPH), pushing the SET - switch will start system control.

If the system is canceled by conditions 1-5 below, the system will resume control at the last set cruising speed by pushing the RESUME + switch.

CANCEL CONDITIONS 

  1. When CANCEL switch is pressed.
  2. When brake pedal depressed.
  3. When the vehicle slows down more than 13 km/h (8 MPH) below the set speed.
  4. When the selector lever is not in the "D" position or manual mode.
  5. When the parking brakes are applied.
  6. When the MAIN switch is turned OFF.
  7. When VDC (including the TCS) operates.
  8. When a wheel slips.
  9. When the system malfunction occurs.
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