ESS (EMERGENCY STOP SIGNAL SYSTEM) OPERATION

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  Note
  • The ESS (Emergency stop signal system) gives priority to the ESS operation over the turn switch operation.
  • The ESS (Emergency stop signal system) gives priority to the hazard warning switch over the ESS operation.

• The ESS (Emergency stop signal system) system has two warning modes; the sudden deceleration hazard warning mode in which the turn lights flash rapidly, and the emergency stop hazard warning mode in which the turn lights flash normally.
• The mode switches from the sudden deceleration hazard warning mode to the emergency stop hazard warning mode after certain conditions are met.

Sudden Deceleration Hazard Warning Mode

• The sudden deceleration hazard warning mode operates while the vehicle speed is 50 km/h {31 mph} or more.
• When the sudden deceleration hazard warning mode operates the turn lights flash at 3.0-4.0 Hz.

Operation

1. If the brake pedal is depressed and the vehicle is decelerated while the vehicle speed is 50 km/h {31 mph} or more, the BCM calculates the vehicle deceleration speed based on the speed signal of each wheel sent from the ABS wheel-speed sensor.

2. The BCM controls the flashing of the turn lights at 3.0-4.0 Hz when the calculated deceleration speed is the set value or more for the sudden deceleration hazard warning mode. A turn indicator light illumination request signal is also sent to the instrument cluster.

3. If the calculated deceleration speed is the set value or less for the sudden deceleration hazard warning mode, the BCM stops the sudden deceleration warning mode.

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Emergency Stop Hazard Warning Mode

• When the emergency stop hazard warning mode operates, the turn lights flash at 1.5 Hz.

Operation

1. After the sudden deceleration hazard warning mode operates, the BCM controls the flashing of the turn lights at 1.5 Hz (same as normal flashing) if the vehicle speed is 10 km/h {6.2 mph} or less and the brake pedal switch is on (brake pedal depressed). A turn indicator light illumination request signal is also sent to the instrument cluster.

2. If the brake switch is off (brake pedal not depressed), the BCM stops the operation of the emergency stop hazard warning mode.

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