Get Hydraulics Guide for Citroen C6 4 Door First Generation (2005-2012)

SAFETY REQUIREMENTS: ACTIVE SUSPENSION WITH VARIABLE DAMPING

All operations on the hydraulic suspension circuit must be performed in conformity with the following requirements and regulations:

Authorities competent in matters of health:

- Accident prevention.

- Environmental protection.

WARNING: Operations should be carried out by specialised personnel who have had training in the safety requirements and precautions to

be taken.

Safety requirements.

ESSENTIAL: In view of the special features of the hydraulic suspension system, observe the requirements below, before undertaking any

repair.

IMPERATIVE: Depending on the operation to be carried out, respect the requirements for supporting and securing the vehicle.

Wheels hanging

Wheels not hanging

Vehicle on 4-column lift

Vehicle on the ground

2-column lift or secure the

vehicle on 4 axle stands

Depressurisation of the circuit

(see corresponding operation)

Checking and adjusting of

heights (switch on ignition)

Other operations

(depressurisation of the

hydraulic circuit)

195

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 LDS fluid with the eyes, rinse them with copious amounts of water and seek specialist advice.

NOTE: In the event of lengthy contact of LDS fluid with the skin, wash it with soap and water.

WARNING: After the engine has stopped, wait 30 seconds before commencing any operation.

196

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.

197

SUSPENSION SPHERES: GENERAL SPECIFICATION

Each suspension sphere is identified at "a", by one number and two letters, marked in bold characters:

- The number consists of 2 digits, corresponding to the nitrogen pressure inside the suspension sphere.

- The two letters identify the location of the suspension sphere.

Other information marked on the suspension sphere:

- Day of the year of manufacture.

- Year of manufacture.

- Time of manufacture.

- Factory no. of the suspension sphere.

B3BP1BJD

198

SUSPENSION SPHERES: SPECIFICATION - IDENTIFICATION

Specifications.

The «slimline» accumulators are grey in colour.

NOTE: Recharging the «slimline» accumulators with nitrogen is impossible.

Volume of nitrogen

: 385 15 cc.

Suspension cylinder accumulators (front).

Engine version

ES9A

Suspension sphere marking

GO

Pressure rating (bars)

50

DT17BTED4

Suspension cylinder accumulators (rear).

Engine version

ES9A

Suspension sphere marking

KS

Pressure rating (bars)

40

DT17BTED4

NOTE: The dampers are integral to the suspension cylinders (AMVAR cartridge). (*)

(*) AMVAR = Amortissement Variable (variable damping).

199

SUSPENSION SPHERES: SPECIFICATION - IDENTIFICATION

Stiffness regulator accumulators (front).

NOTE: The dampers are integral to the hydractive regulator.

Engine version

ES9A

Suspension sphere marking

KR

Pressure rating (bars)

70

DT17BTED4

Stiffness regulator accumulators (rear).

NOTE: The dampers are integral to the hydractive regulator.

Engine version

ES9A

Suspension sphere marking

KS

Pressure rating (bars)

40

DT17BTED4

The suspension cylinders on the same axle have to be equipped with the same type of suspension accumulators.

IMPORTANT: Tightening torque for the suspension accumulators : 2,7 0,5 m.daN.

200

DE-PRESSURISING THE HYDRAULIC SUSPENSION CIRCUIT

Tools.

Go into the menu:

- Suspension.

- De-pressurisation.

[1] PROXIA station

[2] LEXIA station

: 4165-T

: 4171-T

Follow the instructions displayed on the screen.

Wait for the vehicle's suspension to sink completely.

NOTE: This operation takes around 3 minutes.

Switch off the ignition.

De-pressurisation.

NOTE: It is possible to de-pressurise the suspension by individual axle.

Disconnect the battery.

Using a diagnostic tool.

Without a diagnostic tool.

Start the engine.

Place the height control in the «LOW» position.

Wait for the vehicle height to reach the position required.

Stop the engine.

Connect the diagnostic tool [1] or [2] to the vehicle's diagnostic socket.

Switch on the ignition.

IMPERATIVE: Any LDS fluid that is collected must not be re-used.

NOTE: Collect the LDS fluid in order to keep the work area clean.

Respect the environment.

Start the engine.

Place the height control in the «LOW» position.

Stop the engine.

Carry out a global test.

201

DE-PRESSURISING THE HYDRAULIC SUSPENSION CIRCUIT

Front suspension: Undo the pressure release screw (1) by one turn.

Wait for the pressure in the hydraulic circuit to drop fully.

Rear suspension: Undo the pressure release screw (2) by one turn.

Wait for the pressure in the hydraulic circuit to drop fully.

B3BP1BED

B3FP7HDD

202

Hydraulics for Your Citroen C6 4 Door First Generation (2005-2012)

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