CITROEN 2005 C4-XSARA-XSARA PICASSO BERLINGO Owner's Manual page 310

XSARA PICASSO CHECKS: EXHAUST GASES RECYCLING CIRCUIT
Engines: RHY - RHZ
Tool.
[1] Manual vacuum pump : FACOM DA 16
IMPERATIVE: Respect the safety and cleanliness requirements.
EGR valve.
Connect the tool [1] to the capsule union (1).
Apply, several times in succession, a vacuum of approx. 0.6 bar to activate the rod "a".
In abrupt reaction to the vacuum, the valve should close on its seating with a clicking noise.
Exhaust gas reycling (EGR) electrovalve.
Check, not under load, between the electrovalve (2) and the EGR valve (1).
Connect the tool [1] between the electrovalve (2) and the capsule (1).
Compare readings with the values in the table below.
Engine speed (rpm) Vacuum value
780 0,5 bar
2500 0 bar
B1HP12GD
304