Hi there i have got a problem with the above car as the exhaust flap is not working.

it has had a genuine rear box fitted as the previous one stuck shutand corroded through.

i located the vacuum valve in the boot, started the engine and joined the two pipes together and the flap closed ruling out a vacuum leak. I then scoped the signal and there isnt one just battery voltage. im guessing there should be a pwm signal from ecu?

any suggested things to check would be much apreciated

thanks matt ladds