2000 Citroen C5 check engine

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90
Setting the valve timing (continued)
- Remove the tool [1].
- Refit the tool [1].
- Tension value should be :
51 ± 3 SEEM units.
IMPERATIVE : If value is incorrect, restart the operation.
- Remove tools [1]. [2] and [5].
- Rotate the crankshaft 2 times(normal direction of rotation).
- Fit the tool [3].
IMPERATIVE : Should it be impossible to peg the camshaft, check that the
offset between the camshaft pinion hole and the pegging hole is not more
than 1 mm. In the case of an incorrect value, recommence the operation.
- Remove the tool [2].
- Complete the refitting of components.
CHECKING AND SETTING THE VALVE TIMING
Engine : 4HX
B1EP15ED

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108
CHECKING THE OIL PRESSURE
Engine type
Temperature (°C)
Pressure (Bars)
Rpm
Engine type
Temperature (°C)
Pressure (Bars)
Rpm6FZ RFN RLZ XFX
90°C
1.5 5 1.5 5 1.5 5 7 8
1000 3000 1000 3000 1000 3000 900 3000
Diesel engines 1.8i 16V
2.0 HDi 2.2 HDi2.0i 16V2.0 HPi3.0i V6 Petrol engines
Tools
Tool kit 4103-T
RHY RHZ 4HX
90°
242 424
1000 2000 1000 2000 1000 2000
ESSENTIAL : Respect the safety and cleanliness recommendations.

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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.

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INJECTION
AIR SUPPLY CIRCUIT SPECIFICATION
Engine : 4HX
ESSENTIAL : Respect the safety and cleanliness
recommendations.
Tool.
[1] Manual vacuum pump: FACOMM DA 16.
Checks.
ESSENTIAL : Respect the safety and cleanliness
recommendations that are specific to high pressure
diesel injection (HDi) engines.
B1HP1ARP

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INJECTION
CHECKS : AIR SUPPLY CIRCUIT
Engine : 4HX
Vacuum pump.
- Connect the tool [1] on the vacuum pump (3).
- Start the engine.
- The vacuum should be 0.8 bar at750 rpm.
Boost vacuum regulation electrovalve.
- Connect the tool [1] between the electrovalve (2)and the valve(1).
Compare readings with the values in the table below.
Boost pressure regulation valve.
- Connect the tool [1] on the valve(1).(Grey marking on pipe).
- Appy a vacuum of 0.8 bar. The rod "a"should move 12 ± 2 mm.
- Rod "a"should be moved 12 mm.
«Swirl» control electrovalve.
- Connect the tool[1] as an adaptor between the electrovalve (4)and the control diaphragm of the «Swirl» (5).
- Compare readings with the values in the table below :
«Swirl» control diaphragm.
- Connect the tool[1] on the control diaphragm of the «Swirl» (5).
- Apply a vacuum of approx. 0,6 Bar; the pin (6)should be at the end stop, at «b».
Engine speed (rpm) Vacuum (Bar)
7800.6 Bar
40000.25 Bar
Engine speed (rpm) Vacuum (Bar)
7800.6 Bar
40000.25 Bar

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INJECTION
CHECKS : EXHAUST GASES RECYCLING CIRCUIT
Engines : RHZ - RHY
(1) Butterfly housing(3) Electrovalve (black connector)
(2) EGR valve(tube with blue marking)(4) Electrovalve(blue connector)
TOOL
[1] Manual vacuum pump : FACOM DA 16.
ESSENTIAL : Respect the safety and cleanliness requirements specific to
high pressure diesel injection (HDi) engines.
EGR electrovalve
- Check, not under load, between the electrovalve(4)and the EGR valve (2).
- Connect the tool[1] between the electrovalve (3)and the butterfly housing (1).
- Compare readings with the values in the table below.
Butterfly housing electrovalve.
- Check, not under load, between the electrovalve (3)and the butterfly housing (1).
- Connect the tool[1]between the electrovalve(3) and the butterfly housing(1).
- Compare readings with the values in the table below.
Engine speed (rpm) Vacuum value (bar)
7800.5 Bar
25000 Bar
B1HP1BVD

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INJECTION
CHECKS : EXHAUST GASES RECYCLING CIRCUIT
Engines : RHZ – RHY
EGR valve
- Connect tool [1]on the EGR valve capsule take-off (2).
- Apply a vacuum of approx.0,6 barto activate the EGRvalve.
- In abruptly suppressing the vacuum, the valve should click and lock itself back on its seating.
- Repeat the operation several times.
Butterfly housing
- Remove the air duct between the air/air exchanger and the butterfly housing (5),(1).
- Connect tool[1]on the butterfly housing vacuum capsule (1).
- Apply a vacuum of approx. 0,8 bar, the flap (a)of the butterfly housing(1)should be closed.
B1HP1BWCB1BP2ADC