Vacuum regulating valve is located in left side of engine compartment.
Remove
Vacuum regulating valve (arrowed) from clip.
Vacuum hoses from vacuum regulating valve.
Measure
Operating pressure of valve - apply vacuum of 0.60 bar/8.7 psi to port S then check vacuum at port Z is 0.31 to 0.35 bar/4.5 to 5.1 psi.
Install
Vacuum hoses to vacuum regulating valve.
Vacuum regulating valve to clip.