2000 Citroen C5 Fuel pump

Downloaded from www.Manualslib.com manuals search engine ENGINE
82
CHECKING AND SETTING THE VALVE TIMING
Engines : RHY - RHZ
Setting the valve timing (continued).
- Retighten the screws (21)by hand.
- Turn the pinion(24)(clockwise) to the bottom of the buttonhole.
- Refit the belt on the crankshaft (25).
- Hold the belt, using tool [4].
Reposition the timing belt, keeping the belt tight at «a»,
in the following order :
- Guide roller (23).
- Fuel high pressure pump pinion (26).
- Camshaft pinion (24).
- Water pump pinion (18).
- Tensioner roller (20).
NOTE :If needed, slightly turn the pinion(24)anti-clockwise (not by
more than one tooth).
- Remove the tool [4].
B1EP154CB1EP155DB1EP153D

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88
CHECKING AND SETTING THE VALVE TIMING
Engine : 4HX
Setting the valve timing (continued).
Refit
- Retighten the screws (25) by hand.
- Turn the pinion (29)(clockwise)to the bottom of the buttonhole.
- Refit the belt on the crankshaft (28).
- Hold the belt, using tool[4].
- Reposition the timing belt, keeping the belt tight at «a», in the following order :
- Guide roller (27).
- Fuel high pressure pump pinion (30).
- Camshaft pinion (29).
- Water pump pinion (22).
- Tensioner roller (24).
NOTE : If needed, slightly turn the pinion (29)anti-clockwise(not by more
than one tooth).
- Remove the tool [4].
B1EP15CCB1EP15DDB1EP15BD

Downloaded from www.Manualslib.com manuals search engine 120
INJECTION
PROHIBITED OPERATIONS: HDi DIRECT INJECTION SYSTEM
Engines : RHY - RHZ - 4HX
Cleaning.
- The use of high pressure cleaners is prohibited.
- Do not use compressed air.
Fuel supply circuit.
- Required fuel : diesel.
Electric circuit.
- Swapping injection ECUs Between two vehicles will render it impossible to start either vehicle.
- It is forbidden to supply a diesel injector with 12 volts.
High pressure fuel pump.
Do not separate the following components from the high pressure fuel pump (5):
- Sealing ring (b)(no replacement parts).
- High pressure outlet connector (a)(will cause a malfunction).
PS : HDi = High pressure diesel injection.
B1HP19LC

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INJECTION
SAFETY REQUIREMENTS : HDi DIRECT INJECTION SYSTEM
Engines : RHY - RHZ - 4HX
CLEANLINESS REQUIREMENTS.
Preliminary operations
IMPERATIVE : The technician should wear clean overalls.
Before working on the injection system, it may be necessary to clean the apertures of the following sensitive components :
(refer to corresponding procedures).
- Fuel filter.
- High pressure fuel pump.
- Third piston deactivator.
- High pressure regulator.
- High pressure sensor.
- High pressure fuel injection common rail.
- High pressure fuel pipes
- Diesel injector carriers.
IMPERATIVE : After dismantling, immediately block the apertures of the sensitive components with plugs, to avoid the entry of impurities.
Work area.
- The work area must be clean and free of clutter.
- Components being worked on must be protected from dust contamination.

Downloaded from www.Manualslib.com manuals search engine 124
INJECTION
CHECKS : LOW PRESSURE FUEL SUPPLY CIRCUIT
Engines : RHY - RHZ - 4HX
Engines : RHY - RHZ
Engine : 4HX
TOOLS
[1] Ø 10 mmlow pressure connector: 4215-T.
[2] Ø 8 mmlow pressure connector: 4218 -T.
[3] Pressure gauge for testing boost pressure : 4073-T Tool kit 4073-T
[4] Extension: 4251-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.
NOTE : To check the pressures while the vehicle is being driven, insert tool[4] Between
tool[3] and tools[1] et[2].
Checks on pressure : static.
- Switch on ignition
- For 3 seconds(normal functioning):
- Fuel supply pressure shown by the pressure gauge [3] = 2.6 ± 0.4 Bar.
- Fuel return pressure shown by the pressure gauge [3] = 0.6 ± 0.4 Bar.
B1BP20JDB1BP27BD

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INJECTION
CHECKS : LOW PRESSURE FUEL SUPPLY CIRCUIT
Engines : RHY - RHZ - 4HX (continued)
Checks on pressure : dynamic.
Engine running, at idle (normal functioning):
- Fuel supply pressure shown by the pressure gauge [3] = 2 ± 0.4 Bar.
- Fuel return pressure shown by the pressure gauge [3] = 0.8 ± 0.4 Bar.
Abnormal functioning
Impossible to start the engine :
Fuel supply pressure less than 0.8 Bar:
- Check the low pressure regulator incorporated in the filter(locked open)
- Check the high pressure pump distribution valve (locked shut)Check : diesel injector return flow. (Table below)
Uncouple the diesel injector return pipe.
Fuel supply pressure Fuel return pressure Checks
Between 3.3et 4 Bars 0.8 ± 0.4 BarCheck the condition of the diesel filter
More than 4 Bars
More than 4 BarsLess than 0.8 Bar
More than 0.8 BarCheck the low pressure regulator incorporated in
the filter (locked shut) : replace.
Check the fuel return circuit (pipe pinched or trapped...).
Between 0.8et 1.5 BarLess than 0.8 BarCheck the fuel suppy circuit :
- Booster pump(low pressure), piping.
Check :
Observe :
The flow should be drop by drop
Diesel injector functioning correctly
Excessive fuel return
Diesel injector locked shut.

Downloaded from www.Manualslib.com manuals search engine FEATURES OF MULTIPOINT INJECTION SYSTEM
Summary
(1) Air pump
(2) Power steering pressure sensor
(3) Engine management ECU
(4) Canister purge electrovalve
(5)Butterfly housing
(6)Idle regulation stepper motor
(7) Inlet air temperature sensor
(8)Inlet housing heater element
(9)Butterfly potentiometer
(10)Automatic gearbox (Option)
(11)Built-in systems interface
(12) Transponder
(13)Diagnostic connector
(14) Ignition injection test warning lamp
(15)Battery
(16)Immobiliser unit
(17) Air conditioning
(18) Instrument panel
(19)Fuel tank
(20)Fuel pump, gauge and filter assembly(21)Canister reservoir
(22) Downstream oxygen sensor
(23)Upstream oxygen sensor
(24)Air inlet valve
(25)EGR electrovalve
(26)Camshaft position sensor
(27) Ignition coil
(28)Sparking plug
(29) Injector supply rail
(30)Injectors
(31) Air inlet pressure sensor
(32) Engine coolant temperature sensor
(33) Engine speed sensor
(34)Cooling fan unit
(35) Knock sensor
B1HP1C5P
139
INJECTION

Downloaded from www.Manualslib.com manuals search engine 140
INJECTION
FEATURES OF MULTIPOINT INJECTION SYSTEM
Fuel circuit
Air inlet circuit
(diagr.) Component Supplier Reference Observations
30
4
19
21
20
7
31
6
5
9Recommended fuel
Petrol injector
Canister purge electrovalve
Fuel tank
Canister reservoir
Fuel pump and gauge assembly
with integral fuel filter
Air temperature sensor
Air inlet pressure sensor
Idle regulation stepper motor
Butterfly housing
PotentiometerSAGEM
BOSCH
SAGEM (1)
SOLVAY
MGI
MARWAL
MAGNETI
MARELLI
BOSCH
MGI
MAGNETI
MARELLI (1)
MGI
MAGNETI
MARELLI280520274
IAT S04
0261230034
B13 (1)Unleaded 95 RON or 98 RON
2 way black connector. Resistance : 12,2 ohms
2 way brown connector. Installation : between the engine
fusebox and the brake amplifier
Capacity = 66 Litres
Installation : in the rear LH wheelarch
6 way black connector. Pressure : 3,5 Bars.
2 way grey connector, fixed on the butterfly housing
3 way grey connector integral with the inlet manifold.
4 way black connector, fixed on the butterfly housing
The butterfly housing comprises the inlet air temperature
sensor, the butterfly potentiometer, the electric motor.
3 way black connector, installed on the butterfly housing.
(1) = RFNengine