Home ReviewsRefund
Home/Infiniti/QX80/Infiniti QX80 I (2013-2014)/Repair manual/Anti-Lock/traction Control/Brake Control System (With Preview Function): Overview
Contents Wiring diagrams Section: Anti-Lock/traction Control All sections

Brake Control System (With Preview Function): Overview Infiniti QX80 I

Anti-Lock/traction Control 1 illustration ~367 words

Scheme 40

Scheme 40: Precautions for Removing of Battery Terminal
Scheme 40: Precautions for Removing of Battery Terminal
  1. When removing the 12V battery terminal, turn OFF the ignition switch and wait at least 30 seconds. NOTE: ECU may be active for several tens of seconds after the ignition switch is turned OFF. If the battery terminal is removed before ECU stops, then a DTC detection error or ECU data corruption may occur.
  2. For vehicles with the 2-batteries, be sure to connect the main battery and the sub battery before turning ON the ignition switch. NOTE: If the ignition switch is turned ON with any one of the terminals of main battery and sub battery disconnected, then DTC may be detected.
  3. After installing the 12V battery, always check "Self Diagnosis Result" of all ECUs and erase DTC. NOTE: The removal of 12V battery may cause a DTC detection error.

FUNCTION DESCRIPTION

When the Preview Function identifies the need to apply emergency braking by sensing a vehicle ahead in the same lane and the distance and relative speed from it, it applies the brake pre-pressure before the driver depress the brake pedal and helps improve brake response by reducing pedal free play.

The Preview Function shares component parts and diagnosis with the Intelligent Cruise Control (ICC) system.

CAUTIONThis system is only an aid to assist braking operation and is not a collision warning or avoidance device. It is the driver's responsibility to stay alert, drive safely and be in control of the vehicle at all times.

OPERATION DESCRIPTION

  1. The system detects the distance to the vehicle in front with the ICC sensor of ICC and judges the necessity of emergency braking.
  2. The system detects the accelerator pedal release operation of the driver by the accelerator pedal position sensor and estimates the driver's brake operation intention.
  3. If the system is judged that the emergency braking is necessary and that the driver has the intention to operate the brake, the ABS actuator and electric unit (control unit) applies pre-pressure to reduce brake pedal play.

Note. This system will not operate under the following conditions: When the vehicle is moving at approximately 32 km/h (20 MPH) or less. When the 4WD shift switch is in the 4H or 4L position.

END OF OPERATION

The pre-pressure function ceases when the following conditions are met

  1. When the driver depresses the accelerator pedal or the brake pedal.
  2. If the driver does not operate the accelerator pedal or brake pedal within approximately 1 second.

More articles — Brake Control System (With Preview Function)