Cobra parking aid module

[aeroelastic]

Hi bought an rx400h fitted with non factory reverse parking aid. This is the Cobra one, I found the control module in the boot. My sensor beep randomly while engaging reverse, even when not near to any obstacle. I am thinking of reseting the module. 

Found some information on line about re joining a cut blue wire loop for cobra reverse module then reverse the car to 50cm from wall, switch ignition on and engage reverse to reset. But I can't find any loose blue wire st all from the module. Anyone has any clue how to reset this? 

Thanks in advance.