Get Axles, Suspension, Steering -> Active Suspension with Variable Damping Guide for Citroen C6 4 Door First Generation (2005-2012)

ACTIVE SUSPENSION WITH VARIABLE DAMPING

Location of components

A: Front suspension

B: Rear suspension

NOTE: The rear stiffness regulator is equipped with two accumulators.

(1) Variable damping suspension actuator

(2) Front suspension accumulator

(3) LDS fluid reservoir

B3BP1ASD

(4) Front suspension cylinder

Front axle

(5) Built-in Hydro-electronic Interface (BHI)

(6) Front stiffness regulator

(7) Suspension pressure sensor

(8) Front stiffness regulator accumulator

(9) Wheel travel sensor

B3CP09AD

144

ACTIVE SUSPENSION WITH VARIABLE DAMPING

Rear axle

(10) Rear suspension cylinder

(11) Rear suspension accumulator

(12) Variable damping suspension actuator

(13) Suspension pressure sensor

(14) Rear stiffness regulator accumulator

(15) Rear stiffness regulator

(16) Wheel travel sensor

Source of pressure.

Features.

Hydraulic fluid

: LDS TOTAL H50126.

The LDS fluid orange in colour is 100% synthetic.

Capacity of the hydraulic circuit

B3DP0BSD

: 6.3 litres.

LDS fluid reservoir

NOTE: LDS: Liquide Direction Suspension (steering/suspension fluid).

«a» LDS fluid reservoir filler (cap)

«b» Suction (BHI) (power steering pump)

«c» Return (stiffness regulators)

«d» Return (power steering pump)

«e» Return (filter)

«f» Suction (filter)

The level of the LDS fluid must be checked with the vehicle in the low position (refer to the

procedure «Depressurisation: suspension circuit»).

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ACTIVE SUSPENSION WITH VARIABLE DAMPING

Built-in Hydro-electronic Interface (BHI)

Composition of the Built-in Hydro-electronic Interface:

- An electric motor.

- A pump with 5 pistons.

- 4 electrovalves.

- 2 non-return valves.

- A pressure limiter.

- An anti-pulse accumulator.

- A filter.

- The suspension ECU.

Features of variable damping suspension.

Variable damping suspension ECU (CSS).

The ECU (CSS) is located in the engine compartment, in the ECU tray.

The ECU (CSS) manages the different damping laws, as a function of the information delivered

by the following components:

- The 4 wheel travel sensors.

- The 2 suspension pressure sensors.

- The speed of the vehicle.

- The speed of rotation of the steering wheel.

The suspension ECU (CSS) pilots the following components:

- The 4 variable damping suspension actuators.

- The Built-in Hydro-electronic Interface (BHI).

B3BP1A1C

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ACTIVE SUSPENSION WITH VARIABLE DAMPING

Wheel travel sensor

(9) Front RH wheel travel sensor

The wheel travel sensor defines the angular position of the suspension lower arm.

Identification of the sensors:

- Front RH wheel travel sensor

- Front LH wheel travel sensor

- Rear RH wheel travel sensor

- Rear LH wheel travel sensor

: Yellow.

: Red.

: Green.

: Blue.

B3BP19ZC

Suspension pressure sensor

IMPERATIVE: Before operating on a wheel travel sensor, uncouple its rod so as not to

go past the maximum angular travel (see corresponding operation).

The suspension pressure sensors (7) informs the suspension ECU (CSS) of the pressure in

the hydraulic high pressure pipes of the front suspension.

The sensor (13) informs the suspension ECU (CSS) of the pressure in the hydraulic high

pressure pipes of the rear suspension.

B3BP19YC

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ACTIVE SUSPENSION WITH VARIABLE DAMPING

Variable damping suspension actuator

Each suspension cylinder has a variable damping suspension actuator.

(1) Variable damping suspension actuators (front)

(12) Variable damping suspension actuators (rear)

Anti-roll bars:

Front anti-roll bar.

ES9A

: Diameter 23.5 mm Yellow.

DT17BTED4

: Diameter 24 mm Pink.

Rear anti-roll bar.

ES9A and DT17BTED4

: Diameter 20.6 mm Orange.

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ACTIVE SUSPENSION WITH VARIABLE DAMPING

One-touch control for body height

«g» One-touch control to raise body height

«h» Sport mode activation/deactivation switch

«j» One-touch control to lower body height

C5FP0R8C

149

Axles, Suspension, Steering -> Active Suspension with Variable Damping for Your Citroen C6 4 Door First Generation (2005-2012)

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