2004 Citroen XSARA PICASSO Diesel pressure switch

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INJECTION
CHECKS: LOW PRESSURE FUEL SUPPLY CIRCUIT
Engines: 8HV 8HY 9HZ 9HY
Tools.
[1] Ø 10 mmlow pressure connector: 4215T.
[2]Pressure gauge for testing boost pressure: 4073T.A Tool kit 4073T
IMPERATIVE: Respect the safety and cleanliness specific to high pressure diesel
injection engines.
Remove the air filter duct.
Link tool [1]in series, downstream of the injectors, between the fuel high pressure pump
and the fuel filter at «a»and «b».
WARNING:Any checking of pressure downstream of the fuel filter is prohibited.
Switch on the ignition.
ESSENTIAL: Check that the tool [2] is clean.
Check the negative pressure according to the table below:
VacuumObservations
10 ±05 cmhg
Engine driven by the starter motor
20 ± 20 cmhg
60 ± 05 cmhgEngine running under full load
Supply circuit obstructed
(full tank
strainer, piping, fuel filter).B1BP2PHC
C3 XSARA PICASSO

Downloaded from www.Manualslib.com manuals search engine 261
INJECTION
XSARA PICASSO
CHECKS: LOW PRESSURE FUEL SUPPLY CIRCUIT
Engines: RHY RHZ
Tools.
[1] Ø 10 mm
low pressure connector: 4215T.
[2] Ø 8 mmlow pressure connector: 4218 T.
[3]Pressure gauge for testing boost pressure: 4073 T Kit 4073 T
Connect the tool [1]between the booster pump and the fuel filter (white mark at "a" on the
fuel supply pipe).
Connect the tool [2]downstream of the diesel injectors, between the high pressure fuel
pump and the fuel filter (green mark at "b"on the fuel return pipe).
WARNING: Any check of pressure downstream of the fuel filter is PROHIBITED.
Checks on pressure:static.
Switch on ignition
For 3 seconds(normal functioning):
Fuel supply pressure shown by the pressure gauge [3] = 1.8 ± 0.4 Bar. Fuel return pressure shown by the pressure gauge [3] = 0.5 ± 0.4 Bar.
B1BP1TWD