MAZDA RADAR CRUISE CONTROL (MRCC) SYSTEM WARNING ALARM
id151400001000
Purpose
• The MRCC warning alarm alerts the user of the following conditions.
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― The distance between vehicles is close
― The MRCC system was canceled automatically due to low vehicle speed
― Malfunction has occurred in MRCC system
Function
• The radar unit sends a warning sound request signal to the instrument cluster in the following cases.
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― Collision with vehicle ahead is determined even though automatic braking control is performed
― Vehicle speed decreases below set vehicle speed and MRCC system is canceled automatically
― Malfunction is detected in MRCC system
• If the instrument cluster receives a warning sound request signal from the radar unit, is sounds the MRCC warning alarm using the buzzer in the instrument cluster.
• The MRCC warning alarm sound pattern is as indicated in the figure.
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― Collision with vehicle ahead is determined even though automatic braking control is performed
― Vehicle speed decreases below set vehicle speed and MRCC system is canceled automatically
― Malfunction is detected in MRCC system
Construction
• The MRCC warning alarm sounds using the buzzer built into the instrument cluster.
Operation
1. The radar unit sends a warning sound request signal via CAN communication to the instrument cluster.
2. The instrument cluster turns the transistor ON (2) when it receives the warning sound request signal from the radar unit.
3. When the transistor turns on, a ground circuit with the alarm is established and the alarm sounds (3).
Fail-safe
• Not applicable
