VEHICLE PROXIMITY NOTIFICATION SYSTEM


  1. FUNCTION OF MAIN COMPONENTS

    Component Function
    Hybrid Vehicle Control ECU Controls starting and stopping of operation, sound pitch and volume level based on signals received from the ECUs and switch.
    Vehicle Approaching Speaker Assembly Emits warning sounds based on the operation signal received from the hybrid vehicle control ECU.

    Pattern Select Switch Assembly


    • Vehicle approaching speaker switch

    		 Disables the vehicle proximity notification system operation when the switch is turned on.
    Transmission Shift Main Switch As this switch turns on, it detects the driver's operation of the parking lock (shift position P selected), and sends it to the hybrid vehicle control ECU.
    Stop Light Switch Assembly Detects when the brake pedal is depressed.
    Combination Meter Assembly Sends a vehicle speed signal to the hybrid vehicle control ECU.

    Brake Booster with Master Cylinder Assembly


    • Skid Control ECU

    		 Sends a stop light ON signal to the hybrid vehicle control ECU.
    Main Body ECU (Multiplex Network Body ECU) Sends a tail light ON signal to the hybrid vehicle control ECU.

  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) or higher, the engine is stopped, the stop light is off, vehicle approaching speaker switch is off and the shift position is other than P.*

    • The vehicle speed is 25 km/h (15 mph) or less, the engine is stopped, vehicle approaching speaker switch is off and the shift position is 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 P position 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 a vehicle speed of 0 km/h (0 mph) and the stop light switch assembly off signal is received continuously for more than approximately 3 seconds, the system operates 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 the 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 Global 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 hybrid vehicle control ECU will also store Diagnostic Trouble Codes (DTCs). The DTCs can be read by using the Global TechStream (GTS). For details, refer to the Repair Manual.