GENERAL INFORMATION
The Emergency Stop signal System (ESS),
which blinks the hazard warning lamps rapidly
at a sudden braking, is employed in some vehicles. The other service
procedures are the same
as before.
ESS
FUNCTION
ESS SYSTEM CONFIGURATION
The ABS-ECU
judges whether the brake is applied suddenly or not according to the
stop
lamp switch ON signal sent from the stop lamp switch and the frequency
signal in proportion
to the rotation speed of each wheel sent from the wheel speed sensors.
If the ABS-ECU judges
that the brake is applied suddenly, it sends the ESS activation request
signal to the ETACS-ECU.
When the ETACS-ECU receives the ESS activation request signal, it makes
the hazard warning lamps
flash quickly.
Emergency stop signal operating condition
It operates when
the following conditions are met.
- The vehicle speed is 55 km/h or more.
- The brake pedal is depressed, and the system judges that the
brake is applied suddenly
according to the deceleration of the vehicle and the ABS
operation status.
Emergency stop signal operation stop condition
The operation
will be stopped under one of the following
conditions.
- The brake pedal is released.
- The hazard warning lamps are flashing by the hazard warning lamp
switch operation.
- The system judges that the brake is not applied suddenly
according to the deceleration
of the vehicle and the ABS operation status.