EMERGENCY CALL SYSTEM

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Caution
•  If the finalization procedure is not performed, the emergency call system will not operate normally, therefore, perform the finalization procedure. For details on the finalization procedure, refer to the [EMERGENCY CALL UNIT FINALIZATION PROCEDURE] in the workshop manual.
•  If an automatic call is made, the built-in battery power may be depleted and emergency calls may not be possible in the event that an emergency occurs again. After an automatic emergency call has been made, have the built-in battery replaced by an expert repairer (we recommend an Authorized Mazda Repairer).

Outline

•  The emergency call system is a system which reports the location of an accident occurring with the vehicle and vehicle information to a call center to assist in a prompt emergency rescue in an emergency situation such as an accident or sudden illness occurring while driving.
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Functions


Auto call function

•  The emergency call unit makes a call automatically to a call center to report an emergency if an accident occurs with the vehicle.


Manual call function

•  The emergency call unit makes the call to a call center to report an emergency based on the operation of the emergency call unit switch by the user.


Audio speaker mute function

•  The emergency call unit stops audio output so that it does not interfere with an on-going voice call with the call center.


System conditions notification function

•  The emergency call system notifies occupants of the system operation status using the illumination/flashing pattern of the emergency call system indicator and the notification sound output from the emergency call speaker.

Status

Indicator illumination/flashing pattern*1

Notification sound*2

Green

Red
Normal (market mode)
―
―
―
Malfunction (market mode)
―
ON
ON
Diagnosis
ON
ON
―
Dialing call center
Flash
―
Call audio
While sending accident/vehicle information
Flash
―
ON
Voice call starts
ON
―
ON
During voice call
ON
―
―
Connection failed
Flash
ON
ON
Normal (factory mode)
Flash
Flash
―
Malfunction (factory mode)
Flash
ON
ON

*1  :For details on the flashing pattern of the indicator, refer to the emergency call switch. (See EMERGENCY CALL SWITCH [(E)].)
*2  :For details on the notification sound, refer to the EMERGENCY CALL UNIT. (See EMERGENCY CALL UNIT [(E)].)


Structural View

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Operation


Auto call operation

1.  If the vehicle is involved in a collision, the SAS control module sends (1) a collision detection signal to the emergency call unit via CAN communication and hard wire.

2.  When the collision detection signal is received from the SAS control module, the emergency call unit detects the following information based on a signal (2) from the related module.

•  Vehicle/accident information
―  Accident occurrence position information and accident occurrence time information received from GPS/GLONASS antenna
―  Vehicle model information and traveled distance (total traveled distance) received from instrument cluster
―  Engine information (fuel information) received from BCM

3.  The emergency call unit sends (3) accident information/vehicle information to a call center via TEL antenna. In addition, the emergency call unit sends an operation status notification signal to the emergency call speaker and the emergency call switch, and controls the activation of the notification sound and the illumination/flashing of the indicator.

4.  When the transmission of the accident information/vehicle information to the call center is completed or approx. 20 s have elapsed after starting to send the accident information/vehicle information, the emergency call unit starts the voice call (5) with the call center via the emergency call speaker/microphone.

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Manual call operation

1.  When an emergency call switch OFF signal is received (1) after receiving an emergency call switch ON signal for approx. 1 s or more, the emergency call unit detects (2) an emergency call request from the user.

Note
•  If an emergency call switch OFF signal is received after receiving the emergency call switch ON signal for approx. 0.5 s or more before the voice call with the call center starts, the emergency call unit stops the emergency call.

2.  When the emergency call request is detected, the emergency call unit detects the following information based on a signal (3) from the related module.

•  Vehicle information
―  Vehicle position information and emergency call request occurrence time information received from GPS/GLONASS antenna
―  Vehicle model information and traveled distance (total traveled distance) received from instrument cluster
―  Engine information (fuel information) received from BCM

3.  The emergency call unit sends (4) accident information/vehicle information to a call center via TEL antenna. In addition, the emergency call unit sends an operation status notification signal (5) to the emergency call speaker and the emergency call switch, and controls activation of the notification sound and the illumination/flashing of the indicator.

4.  When the transmission of the vehicle information to the call center is completed or approx. 20 s have elapsed after starting to send the vehicle information, the emergency call unit starts the voice call (6) with the call center via the emergency call speaker/microphone.

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Audio speaker mute operation

1.  When a collision detection signal is received or an emergency call request is detected, the emergency call unit sends (1) an audio output stop signal to the connectivity master unit (CMU) via CAN communication.
2.  When the audio output stop signal is received, the connectivity master unit (CMU) stops (2) audio output.
3.  When the audio output is stopped, the connectivity master unit (CMU) sends an audio output stop completion signal (3) to the emergency call unit via CAN communication.
4.  When the audio output stop completion signal is received, the emergency call unit detects that stopping of the audio output is completed.
Note
•  If the audio output stop completion signal cannot be received, the emergency call unit cuts off the ACC power supply circuit of the remote tuner (RT) and forcefully stops audio output.
5.  The emergency call unit restores audio output after a voice call is finished.
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