circuit Citroen C4 2005 2.G Repair Manual

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BRAKES
BLEEDING AND FILLING THE BRAKING SYSTEM
Bleeding the braking circuit with the bleed apparatus.
Connect the bleed apparatus [1]on the brake fluid reservoir (4).
Adjust the apparatus pressure to 2 bars.
For each brake circuit:
- Couple a transparent tube on the bleed screw.
- Submerge the other end of the tube in a clean container.
- Open the bleed screw.
- Wait until the brake fluid flows out without air bubbles.
- Close the bleed screw.
- Remove the bleed apparatus [1].
Check the level of the brake fluid
(between the «DANGER»level and the «MAXI»level).
Fill if necessary with the the approved and recommended synthetic brake fluid.
C4
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BRAKESBLEEDING AND FILLING THE BRAKING SYSTEM
Bleeding the braking circuit without the bleed apparatus.
NOTE:Two operators are necessary.
For each brake circuit:
- Apply the brake pedal to place the circuit under pressure.
- Couple a transparent tube on the bleed screw.
- Submerge the other end of the tube in a clean container.
- Open the bleed screw.
- Wait until the fluid flows out without air bubbles.
- Close the bleed screw.
NOTE:Recommence the process a second timeif that is necessary.
Check the level of the brake fluid
(between the «DANGER»level and
the «MAXI»level).
Fill if necessary with the the approved and recommended synthetic
brake fluid.Bleeding the secondary braking circuit.
WARNING: During the bleed operations: take care to maintain the
level of the brake fluid in the reservoir, keep it topped up.
NOTE:The bleed apparatus [1]is still connected on the brake fluid
reservoir (4).
Use the diagnostic tools [2]or [3].
Select the menu corresponding to the vehicle:
- ABSmenu
(according to equipment).- ESPmenu (according to equipment).
Follow the instructions of the diagnostic tool.
At the end of the bleed programme, check the level of the brake fluid,
top up if necessary.
Check the travel of the brake pedal: it must not be excessive. If it is,
restart the bleed procedure.
C4
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BRAKES
ABS/ESP HYDRAULIC BLOCK XSARA
Braking system specifications
- 'X'braking circuit.
- Front: disc brakes, ventilated
(according to model).
- Rear: drum brakes with automatic adjustment.
- Cable operated handbrake acting on the rear wheels.
(1)Hydraulic valve block «ABS Bosch 5.3»or
(1)Hydraulic valve block «ABS Bosch 5.3 REF»or
(1)Hydraulic valve block «ABS with ESP Bosch 5.7».
(2)Load sensitive braking compensator
(according to model).
B3FP09HC
B3FP09JC
2
1
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BRAKES
BRAKE SPECIFICATIONSXSARA PICASSO
Braking system specifications
- 'X'braking circuit.
- Front: disc brakes, ventilated.
- Rear: drum brakes with automatic adjustment.
- Cable operated handbrake acting on the rear wheels.
- Load sensitive braking compensator
(non ABS versions).
(1)Hydraulic valve block «ABS Bosch 5.3» or
(1)Hydraulic valve block + ECU.
(2)Load sensitive braking compensator
(according to version).
B3FP09HC
B3FP08ND
2
1
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BRAKES
BLEEDING THE BRAKING SYSTEMXSARA PICASSO
Tools Bleeding equipment of type «LURO» or similar.
IMPERATIVE: For bleeding the secondary circuit, use ELIT, LEXIA or PROXIA diagnostic tools.
Draining.
Drain the brake fluid reservoir as empty as possible using a syringe.
Disconnect the brake fluid warning lamp connector.
Retrieve the brake fluid reservoir from its supply pipes by pulling upwards.
Finish emptying the reservoir of brake fluid.
Clean the brake fluid reservoir.
Refit the brake fluid reservoir.
Reconnect the brake fluid warning lamp connector.
Filling.
Refill the reservoir with brake fluid.
WARNING: Use only the recommended hydraulic fluids.
Bleeding.
NOTE:Two technicians are required.
IMPERATIVE: During bleed operations, ensure that the level of brake fluid is maintained
in the reservoir and top it up, use only new brake fluid.
Bleed each wheel cylinder, proceeding in the following order:
- Rear right hand wheel.
- Front left hand wheel.
- Rear left hand wheel.
- Front right hand wheel.
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AIR
CONDITIONING
Checking the compressor oil level (continued)
2/ Slow leak.
Slow leaks do not lead to oil loss, therefore the same procedure should be followed as if there was no leak at all.
3/ Fast leak.
This type of leak causes both oil loss as well as allowing air to enter the system.
It is therefore necessary to:
- Replace the dehydrator.
- Drain as much oil as possible
(when replacing the faulty component).
Either before or during filling of the system with R 134.afluid, introduce 80 ccof NEWoil into the circuit.
When changing one of the following components, add the quantity stated:
- A drying bottle : 15 ccof compressor oil.
- A condenser or an evaporator : 20 ccof compressor oil.
- High pressure or low pressure pipework : 5 ccof compressor oil.
- A drying cartridge : 15 ccof compressor oil.
SPECIAL FEATURES: AIR CONDITIONING SYSTEM (R 134.a)
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AIR
CONDITIONING
SPECIAL FEATURES: AIR CONDITIONING SYSTEM (R 134.a)
Changing the filtering/drying cartridge
Tools.
[1]Charge station:
(according to workshop equipment)[2]TORX adaptor: TORX 70 FACOM
Removing.
Depressurise the aircon circuit, using tool [1].
Uncouple the hose (2).
Remove:
- The air filter assembly (3).
- The nuts (1).
Protect the radiator harness with strong cardboard cut to the dimensions of the radiator.
Move aside the cooling fan.
Remove:
- The screws (4).
- The brackets (5).
B1BP23FCB1BP23GC
XSARA PICASSO
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AIR
CONDITIONING
SPECIAL FEATURES: AIR CONDITIONING SYSTEM (R 134.a)
Changing the filtering/drying cartridge
Move aside the radiator/condenser assembly.
Remove the plug (6), using tool [2].
Support the radiator/condenser assembly thus moved aside.
Remove the filtering/drying cartridge (7), using pliers.
Refitting.
Refit the filtering/drying cartridge (7).
Clean the threads of the plug (6).
It is essntial to change the O-ring seals (8).
Lubricate the O-ring seals (8)with aircon compressor oil.
Refit:
- The plug (6), using tool [2], tighten to 1,4 ± 0,2 m.daN.
- The brackets (5).
- The screws (4).
- The cardboard from the radiator harness.
- The nuts (1).
- The air filter assembly (3).
Couple the hose (2).
Recharge the circuit (R134.a)
(according to equipment) (see corresponding
operation).
Check the operation of the air conditioning.
C5HP14NCC5HP14PCC5HP14QC
XSARA PICASSO
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AIR
CONDITIONING
CHECKING THE EFFICIENCY OF THE AIR CONDITIONING SYSTEM
Interpretation of the measurements.
«m»:High pressure.«s»:Over-heating (SC).
«n»:High temperature.«t»:Ambient air temperature.
«p»:Under-cooling (SR).«u»:Blown air temperature.
«q»:Low pressure.«v»: Humidity.
«r»:Low temperature.«w»: Temperature T3.
Under-cooling.
The under-cooling represents the difference between the condensation temperature and the aircon
fluid temperature at the aircon condenser outlet.
The under-cooling gives the quantity of aircon fluid
(in the liquid state)in the air conditioning circuit.
Values for under-cooling (SR).
Values «p» Origins Solutions
SR < 2°CLack of aircon fluid in the aircon condenser
(should be more than 150grammes)
Add some
2°C < SR <4°CLack of aircon fluid in the aircon condenser aircon fluid
(should be around 100to 150grammes)
4°C < SR < 10°C/12°CCorrect quantity
SR > 10°C/12°CRemove some
Excess aircon fluid in the aircon condenser aircon fluid
SR > 15°C
Blown air temperature «u».
The blown air temperature should be between 2°Cand 10°C.
E5AP2FBC
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AIR
CONDITIONING
CHECKING THE EFFICIENCY OF THE AIR CONDITIONING SYSTEM
Interpretation of the measurements.
«m»:High pressure.«s»: Over-heating (SC).
«n»:High temperature.«t»:Ambient air temperature.
«p»:Under-cooling (SR).«u»:Blown air temperature.
«q»:Low pressure.«v»:Humidity.
«r»: Low temperature.«w»: Temperature T3.
Over-heating (SC).
The over-heating represents the difference between the aircon fluid temperature at the evaporator outlet
and the evaporation temperature.
The over-heating gives the quantity of aircon fluid (in the liquid state) in the air conditioning circuit
Values for over-heating (SC).
Values «s» Origins Solutions
2° < SC < 15°CCorrect quantity
SC > 15°CLack of aircon fluid in the cooling circuitAdd some
aircon fluid
SC < 2°CExcess aircon fluid in the cooling circuitRemove some
aircon fluid
Blown air temperature «u».
The blown air temperature should be between 2°Cand 10°C.
E5AP2FBC
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