FBWS is a parking assistant system. It has a supersonic sensor which radiates supersonic to front and rear side of the vehicle to detect supersonic reflected from an obstacle. It calculates distances between vehicle and obstacle if it detects reflected supersonic. It warns being obstacle to drivers through buzzer or displaying on cluster according to distance from obstacle. Warning level is divided into 3 step (warning level rises progressively according to distance from obstacle)
This code reports an error in RX line. The purpose is to verify the status of FBWS UNIT, Sensor and Wire when error is detected..
Item
Detecting Condition
Possible Cause
DTC Strategy
Signal output of rear center left sensor check
TX line of rear center left sensor open or poor connection.
RX line of rear center left sensor open or poor connection.
Ground line of rear center left sensor open or poor connection.
Power line of rear center left sensor open or poor connection.
Enable Conditions
IG KEY ON.
Threshold Value
Signal voltage of RX is below 1.5V for more than 0.8ms when TX signal is transmitted to rear left sensor for 0.4ms.
Diagnostic Time
Immediately (1 check lasts 0.3sec after IG KEY ON)
DTC Erasing Time
DTC is erased immediately after trouble fixed
Fig 1) Normal waveform of rear left sensor' TX and RX line under scrubbing it with hand condition.