2005 CITROEN C6 sensor

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HYDRAULICS
SAFETY REQUIREMENTS: ACTIVE SUSPENSION WITH VARIABLE DAMPING
During the operation.
Wait for the pressure in the hydraulic circuit to fall fully before disconnecting the unions on the following components (risk of sudden sinking of the
vehicle):
- Built-in Hydro-electronic Interface (BHI).
- Front suspension cylinder.
- Rear suspension cylinder.
- Front stiffness regulator.
- Rear stiffness regulator.
- Suspension pressure sensors.
IMPERATIVE: Do not operate on the hydraulic circuit without making the pressure drop (see corresponding operation).
Engine running.
Do not operate on the hydraulic suspension circuit.
Always remain out of range of any possible projections of fluid, as these could cause serious injuries.
NOTE:In the event of contact of LDSfluid with the eyes, rinse them with copious amounts of water and seek specialist advice.
NOTE:In the event of lengthy contact of LDSfluid with the skin, wash it with soap and water.
WARNING: After the engine has stopped, wait 30 seconds before commencing any operation.
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197
SAFETY REQUIREMENTS: ACTIVE SUSPENSION WITH VARIABLE DAMPING
IMPERATIVE: Do not remain underneath the vehicle during an operation to adjust vehicle heights or during actuator (electrovalve) tests.
IMPERATIVE: Any deforming of the wheel travel sensor supports is forbidden. If there is any deformation found, replace the component.
Cleanliness requirements.
WARNING: Non-respect of the cleanliness requirements may cause a contamination of the circuit and a malfunctioning of the suspension.
Preliminary operations.
The work area must be kept clean and uncluttered.
The technician must wear clean overalls.
Components being stored during the repair must be protected from dust.
The tooling required for an operation on the suspension system should always be cleaned prior to the operation.
During the operation:
- Before operating on the suspension circuit, proceed to clean the hydraulic components and unions.
IMPERATIVE: Approved cleaner: SODIMAC degreaser.
IMPERATIVE: After a dismantling, immediately blank the hydraulic components and unions with plugs. The plugs should be used for one
operation only.
Any component that has been removed must be plugged and placed in a clean plastic bag.
IMPERATIVE: After a dismantling, any cleaning using compressed air or products is strictly prohibited
. Any LDS fluid that is collected must
not be re-used. Any topping-up must be done with new fluid.
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AIR
CONDITIONING
CHECKING THE EFFICIENCY OF THE AIR CONDITIONING SYSTEM
Aircon circuit diagnosis table (for information)
Principal problem Symptom Possible causes
Aircon compressor clutch
Lack of aircon fluid in the aircon circuit
The clutch of the aircon compressor does not Aircon pressostat
engage, or disengages suddenly
Aircon evaporator sensor
The aircon compressor does not turn Electrical circuit (wiring, fuses, etc.)
or stops suddenly
Auxiliaries drive belt
Aircon compressor
The clutch of the aircon compressor remains Filtering and drying cartridge
engaged and stops suddenly
Aircon pressure reducer
Leak of aircon fluid
Aircon compressor clutch
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AIR
CONDITIONING
CHECKING THE EFFICIENCY OF THE AIR CONDITIONING SYSTEM
Aircon circuit diagnosis table (for information)
Principal problem Symptom Possible causes
Low pressure and high pressure too highAircon pressure reducer defective
Duct clogged
Low pressure too high and high pressure too low Aircon compressor seal defective
Aircon evaporator sensor defective
Low pressure too low and high pressure too high Aircon pressure reducer jammed
Abnormal levels of pressuretoo high
Filtering and drying cartridge obstructed
Duct clogged
Duct clogged
Aircon pressure reducer jammed
Low pressure and high pressure too low
Lack of aircon fluid in the aircon circuit
Aircon compressor defective
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AIR
CONDITIONING
CHECKING THE EFFICIENCY OF THE AIR CONDITIONING SYSTEM
Aircon circuit diagnosis table (for information)
Principal problem Symptom Possible causes
Low pressure normal and high pressure too high Presence of air in the aircon circuit
Low pressure normal and high pressure too lowAircon pressostat defective
Evaporator sensor defective
Abnormal levels of pressure Low pressure too high and high pressure normal Aircon pressure reducer jammed open
Filtering and drying cartridge saturated or
Low pressure too low and high pressure normal clogged
Aircon pressure reducer iced up
Under cooling too weak Lack of aircon fluid
Air conditioning operating inExcess aircon fluid
back-up mode
Under cooling excessive Presence of air in the aircon circuit
Filtering and drying cartridge clogged
NOTE: In all cases, measure the excessive heating (SC)and the blow air temperature.
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