2. Press the parking system main switch and check that the indicator lights up and the buzzer sounds for 0.8 seconds.

If there are no signals, check the indicator unit.
If there is a break in the parking system sensors, or if they are frozen or flooded, fault codes will be issued (the LED, indicator and buzzer make 5 cycles of 2 short signals, after which the LED lights up continuously and the system indicator continues to flash).
(The text is taken from the specified website: ToyotaMan.ru)
