System Overview
RPAS (Rear Parking Assist System) is an electronic driving aid device warning driver to be cautious during parking or low speed when after detecting an object on side and behind of vehicle by using the feature of ultrasonic waves.
RPAS consists of four RPS sensors which detect the obstacles and transmit the result in three separate warning levels, the first, second and third to BCM by LIN communication. BCM decides the alarm level by the transmitted communication message from the slave sensors, then operate the buzzer or transmits the data for display.
Scheme 8
Scheme 9
System Operation Spec
When the system has the power (after IGN ON and R gear), MICOM checks every sensor channel. In case it is not find any error, it sounds 300ms buzzer 500ms afterward. But it finds any error even a sensor, it sounds buzzer corresponding fault sensor instead of initial starting alarm. Function for normal mode entrance is as below
Scheme 10
With R Gear, system function is as below
Scheme 11
With R gear releasing, system function is as below
Scheme 12
*acceptable error range on waveform ±10%