VEHICLE PROXIMITY NOTIFICATION SYSTEM


  1. FUNCTION OF MAIN COMPONENTS

    Item Function
    Vehicle Approaching Speaker Controller Controls starting and stopping of operation, sound pitch and volume level based on signals received from ECUs and sensors.
    Vehicle Approaching Speaker Assembly Emits warning sounds based on the operation signal received from the vehicle approaching speaker controller.
    Power Management ECU Sends a shift lever P position state signal (parking lock state of hybrid transaxle) to the main body ECU (multiplex network body ECU).
    Main Body ECU (Multiplex Network Body ECU) Sends a shift lever P position state signal (parking lock state of hybrid transaxle) to the vehicle approaching speaker controller.
    Combination Meter Assembly Sends a vehicle speed signal to the vehicle approaching speaker controller.
    Engine Oil Pressure Switch Assembly Sends an engine running signal to the vehicle approaching speaker controller.
    Stop Light Switch Assembly Sends a brake pedal state signal to the integration relay.
    Vehicle approaching speaker switch Disables the vehicle proximity notification system operation when the switch is turned on.

  2. OPERATING CONDITION

    Condition Outline
    System Active

    The vehicle proximity notification system operates (emits a warning sound) when either of the following conditions is met:


    • The vehicle speed is 0 km/h (0 mph), the engine is stopped, the stop light is off, vehicle approaching speaker switch is off and the shift lever is in any position other than P.*

    • The vehicle speed is 25 km/h (15 mph) or less, the engine is stopped and the shift lever is in any position other than P.
    System Stop

    The vehicle proximity notification system stops operating when any of the following conditions is met:


    • The engine starts.

    • The vehicle speed is more than 25 km/h (15 mph).

    • With a vehicle speed of 0 km/h (0 mph), the stop light on signal is received continuously for more than approximately 1 second.

    • With a vehicle speed of 0 km/h (0 mph), the shift lever P position state signal is received continuously for more than approximately 1 second.

    • With a vehicle speed of 0 km/h (0 mph), the stop light off signal is received continuously for more than approximately 3 seconds. (Such as when the vehicle is stopped, and in neutral with the parking brake applied).

    • The vehicle approaching speaker switch tuned on.

    Tech Tips


    • *: When the system is stopped due to the vehicle being in a condition where the vehicle speed is 0 km/h (0 mph) and the stop light off signal is received continuously for more than approximately 3 seconds, the system will stop operating and will begin operating again when any of the following conditions is met:


      • A vehicle speed signal of 1 km/h (1 mph) or more is received.

      • The brake pedal is operated.

  3. SYSTEM CONTROL

    Control Outline
    Vehicle Speed Linked Control

    • Emits the warning sound by controlling the pitch of the sound in accordance with vehicle speed.

    • The warning sound becomes higher as the vehicle accelerates and it becomes lower as the vehicle decelerates.
    Audibility Enhancing Control*1 When the vehicle proximity notification system is not sounding and the vehicle is stopped (vehicle speed of 0 km/h (0 mph)), if the system operates due to a vehicle speed signal or brake pedal operation (system is changed from being disabled to enabled), the warning sound volume becomes higher than usual for about 1 second to warn people around the vehicle that the vehicle may move.
    Fade-in/Fade Out Control When the system starts operating, the warning sound volume gradually increases*2, and when system operation is stopped, the sound volume gradually decreases.

    Tech Tips

    *1: The customizable functions can be turned on or off using the Techstream. For details, refer to the Repair Manual.

    *2: When audibility enhancing control is performed, the system starts operating using this control.

  4. DIAGNOSIS


    1. The vehicle approaching speaker controller will also store Diagnostic Trouble Codes (DTCs). The DTCs can be read by using the Techstream. For details, refer to the Repair Manual.