2005 CITROEN C6 fuel

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INJECTION
PROHIBITED OPERATIONS: SIEMENS HDI DIRECT INJECTION SYSTEM
Engine: DT17BTED4
Cleaning.
The use of high pressure cleaners is prohibited.
Do not use compressed air.
Fuel supply circuit.
Required fuel: Diesel.
WARNING: Do not use other fuels.
Electrical circuit.
Swapping injection ECUs between two vehicles will render it impossible to start either vehicle.
It is forbiddento supply a diesel injector with 12 volts.
Do not disconnect a diesel injector when the engine is running.
Fuel high pressure pump.
Do not separate the fuel high pressure pump (1)from the following components:
- The sealing ring (a)(no replacement parts).
- The high pressure outlet connector (b)(will cause a malfunction).
- The fuel pressure regulator (c)(no replacement parts).
- The flow electrovalve (d)(no replacement parts).
B1HP23GC
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INJECTION
PROHIBITED OPERATIONS: SIEMENS HDI DIRECT INJECTION SYSTEM
Engine: DT17BTED4
B1HP23JCB1HP23HC
Diesel injectors.
WARNING: Diesel and ultrasonic cleaners are prohibited.Do not separate the diesel injector carrier (2)from the following components:
- Diesel injector (g)(no replacement parts).
- The fuel flow actuator (e)(destruction).
Do not move the nut (f)(will cause a malfunction).
Do not separate the union (h)from a diesel injector.
It is forbidden
to clean the carbon deposits from the diesel injector nozzle.
Central fuel high pressure common injection rail.
Do not separate the fuel high pressure sensor (j)from the central fuel high pressure injection rail (3).
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INJECTION
SAFETY REQUIREMENTS: HDi DIRECT INJECTION SYSTEM
Safety requirements.
Preamble.
All interventions on the injection system must be carried out to conform
with the following requirements and regulations:
- Competent health authorities.
- Accident prevention.
- Environmental protection.
WARNING: Repairs must be carried out by specialised personnel
informed of the safety requirements and of the precautions to be
taken.
Safety requirements.
IMPERATIVE: Take into account the very high pressures in the high
pressure fuel circuit (1600 bars), and respect the requirements
below:
- No smoking in proximity to the high pressure circuit when work is being
carried out.
- Avoid working close to flame or sparks.
Engine running:
- Do not work on the high pressure fuel circuit.
- Always stay clear of the trajectory of any possible jet of fuel, which could
cause serious injuries.
- Do not place your hand close to any leak in the high pressure fuel circuit.After the engine has stopped, wait 30 secondsbefore any intervention.
NOTE:This waiting time is necessary in order to allow the high pressure
fuel circuit to return to atmospheric pressure.
Cleanliness requirements.
Preliminary operations.
IMPERATIVE: The technician should wear clean overall.
Before working on the injection system, it may be necessary to
clean the apertures of the following sensitive componen (refer to
corresponding procedures):
- Fuel filter.
- Fuel high pressure pump.
- Fuel high pressure common injection rail.
- Fuel high pressure pipes
- Diesel injector carriers.
IMPERATIVE: After dismantling, immediately block the apertures of
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.
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INJECTION
CHECKS: LOW PRESSURE FUEL SUPPLY CIRCUIT
Engine: DT17BTED4
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 Kit 4073-T
[4]Extension: 4251-T
Checks.
IMPERATIVE : Respect the safety and cleanliness requirements specific to high pressure
diesel injection (HDi) engines.
Connect the tool [1]between the booster pump and the fuel filter (white mark 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 on the fuel return pipe.
Connect the tool [3]on tool [1]or on tool [2].
WARNING: Any check of pressure downstream of the fuel filter is prohibited.
NOTE:To check the pressures while the vehicle is being driven, insert the extension [4] between
tool [3]and tools [1]or [2].
B1BP3CRD
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INJECTION
CHECKS: LOW PRESSURE FUEL SUPPLY CIRCUIT
Engine: DT17BTED4
Checks on pressure: static.
Switch on the ignition.
For 3 seconds(normal functioning):
- Fuel supply pressure shown by the pressure gauge[3] = 1.1 ± 0.4 bar.
- Fuel return pressure shown by the pressure gauge [3] = 2 ± 0.5 bar.
Abnormal functioning:
Fuel supply Fuel return
Checks
pressure pressure
Between 2and 3 bar 0.8 ± 0.4 barCheck the condition of the diesel fuel filter
More than 3 barMore than 0.8 barCheck the fuel return circuit (pipe pinched)
Between
Less than 0.8 barCheck the fuel suppy circuit :
0.3and 0.5 barBooster pump (low pressure), piping
Impossible to start the engine:
- Fuel supply pressure less than 0.3 bar.
B1BP3CRD
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