2.5L AET Petrol T4 Transporter - should there be a vacuum hose going to ECU?

[shakeyjakey]

Hi guys

Just wondering if anyone knows if on a 2.5l AET Petrol T4 Transporter if there should be a vacuum hose going to the ECU? it looks like one of the little vacuum hoses coming out of the top of the cylinder head on mine has been cut and goes nowhere.

Thanks for your help

[Rebuild]

probably need pics to get help from a T4 guru.
Wouldn't think theres any mechanical component that requires a vacuum line on an ECU