check engine Citroen C5 2000 (DC/DE) / 1.G Workshop Manual

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AXLES
SUSPENSION
STEERING
L1
The dimension«L1» for checking front height is between the level of
the front subframe «b» and the wheel axis «a».
This method eliminates all the variations in measurement due to :
Different wheel fiittings.
Vehicle loading.
Wear or incorrect inflation of tyres.
(Measuring from the wheel axis : tool 8006-T)
AXLE GEOMETRY
General adjustment conditions
Rear height Front height
NOTE : After each movement of the vehicle body, and before each mea-
surement :
- Move the vehicle slightly forwards and backwards, by turning the road
wheel by hand.- Check the tyre pressures.
- Release the handbrake.
- Place the manual height control in the «NORMAL» position.
- Engine running.
L2
The dimension«L2»for checking rear height is between the measuring
zone «b» and the wheel axis «a».
H1 = R1 - L1
H1 = Front height(± 6 mm).
R1 =Wheel radius(mm).
L1 = Theoretical dimension between the level of the front subframe and
the wheel axis.H2 = R2 + L2
H2 = Rear height (± 6 mm).
R2 = Wheel radius(mm).
L2 = Theoretical dimension between the measuring zone on the cross-
member support and the wheel axis.

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HANDBRAKE (Adjustment)
Adjustment
- Remove the rear ashtray from the handbrake console.
- (1) Nut for adjusting the tension of the handbrake
cables.
- Raise and support the vehicle with the front wheels
hanging free.
- Check the correct routing of the brake cables under the
vehicle.
- Apply and release the handbrake 10 times.
- Set the handbrake to the 5th notch.
- Tighten the nut (1) until the front brakes are applied.
- Pull the handbrake lever vigorously4 to 5 times.
- Set the handbrake to the 5th notch.
- Check that the front brakes are applied.
- With the handbrake released, check that the wheels
can be turned freely by hand.
- Lower the vehicle.
- Refit the rear ashtray to the handbrake console.
229BRAKES

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BRAKES
232
BLEEDING AND FILLING THE BRAKING SYSTEM
Bleeding, filling (continued).
With the bleeding apparatus
- Connect the bleeding apparatus [1] on the brake fluid reservoir (1).
- Adjust the apparatus pressure to 2 Bars.
For each circuit :
- Connect a transparent tube onto the bleed screw, submerge the other end of the tube in a clean container.
- Open the bleed screw, wait until the fluid is flowing out without air bubbles.
- Close the bleed screw.
- Remove the bleeding apparatus [1].
- Check the brake fluid level(Should be between «DANGER» level and«MAXI» level).
- Fill if necessary with the approved and recommended synthetic brake fluid.
Without the bleeding apparatus.
NOTE : Two operators are necessary.
For each circuit :
- Apply the brake pedal to place the circuit under pressure.
- Connect a transparent tube onto the bleed screw, submerge the other end of the tube in a clean container.
- Open the bleed screw, wait until the fluid is flowing out without air bubbles.
- Close the bleed screw.
- Remove the tool [1].
NOTE : Recommence the process a second time if that is necessary.
- Check the brake fluid level, (Should be between «DANGER»level and «MAXI»level).
- Fill if necessary with the approved and recommended synthetic brake fluid.

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BRAKES
BLEEDING AND FILLING THE BRAKING SYSTEM
Bleeding, filling (continued).
Bleeding the secondary circuit.
NOTE : The bleeding apparatus is connected on the brake reservoir.
- Use LEXIAorPROXIAdiagnostic tools.
Select the menu corresponding to the vehicle :
- ABS menu.
- ESP menu.
- Follow the instructions on the diagnostic tool.
- At the end of the bleeding process, check and top up, if necessary, the brake fluid level.
- Check that the brake pedal travel has not been lengthened, otherwise repeat the bleeding procedure.
- Remove the tools.

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SYSTEM
SPECIFICATION - IDENTIFICATION : SUSPENSION SPHERES
Special features
Identification.
- Fitting of new slimline spheres with multilayer membranes, stone grey in colour.
- It is forbidden to recharge or overhaul this type of sphere.
- The number marked on the suspension sphere is the reference no. of the component and not the Part No.
- The two-figure number marked on the suspension sphere indicates the initial inflation pressure value.
Example :
- The pressure value of this type of suspension sphere is given merely as a guide.
- When checking, the value read could be higher than the nominal value.
NOTE : Suspension cylinders on the same axle should be equipped with the same type of membranes.
Tightening torques for these spheres : 2,7 ± 0,5 m.daN.
238
Suspension
sphere marking
96 420 906 80 AG2 066 0 13h59 57Batch of steel Day
of manufactureYea r
of manufactureTime
of manufacturePressure rating
(Bars)

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AIR
CONDITIONING
SPECIAL FEATURES : AIR CONDITIONING SYSTEM (R 134.a)
Tightening torques (m.daN).
Unions
Steel / Steel
Aluminium / Steel Ø Pipes
1.7 ± 3
1.3 ± 3 M 06
3.8 ± 3
2 ± 2 M 08
4 ± 3
2.5 ± 3 M 10
NOTE :For operations concerning draining, drying (empty), checking and refilling of a system: refer to BRE 0290.
WARNING : For R 134.a quantities : (see table on page: 250). NOTE : : Tighten the unions to the recommended torques using a retaining spanner whenever possible

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SPECIAL FEATURES : AIR CONDITIONING SYSTEM (R 134.a)
Condenser with integral reservoir (continued)
Removing the reservoir (6) from the base (8).
WARNING :This operation requires the greatest care, the base(8)should be kept clean prior to fitting
the new reservoir.
- Remove the reservoir (6) and the protection skirt(7), avoiding WITHOUT F
AILany contact or collision
with other items under the bonnet(Risk of impurities entering the base (8)).
- Check before refitting the reservoir (6)that the base(8)is clean.
(If it is not, clean in and around the base(8)with a paper cloth.)
Preparing the new dryer reservoir
- Remove the black plastic protection cap from the reservoir neck (6), leaving in place the green protec-
tion at the other end, in order to keep the new reservoir (6) sealed when mounting it in the base(8)of
the condenser.
- Use the grease sachet in the replacement kit, to lubricate the threads of the reservoir.
- Use the oil sachet in the replacement kit, to lubricate the two O-ring seals of the reservoir (6).
- Position the reservoir(6), with its new protection skirt (7)from the replacement kit, and engage the
threads of the reservoir (6) in the base (8).
- Check that the downward edge of the skirt (7), covers the base(8) all around it.
AIR
CONDITIONING
248

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CONDITIONING
250
ESSENTIAL: The compressor lubricant is extremely hygroscopic; always use FRESH oil.
SPECIAL FEATURES : AIR CONDITIONING SYSTEM (R 134.a)
Compressor lubricant.
Checking the compressor oil level.
There are three specific cases :
- 1/Repairs to a system without leaks.
- 2/Slow leak.
- 3/Fast leak.
1/ Repairing a system without leaks..
a) - Using draining/recovery equipment not fitted with an oil decanter.
- Drain the system as slowly as possible via the LOW PRESSURE valve, so as not to lose any oil.
- No more oil should be added when filling the system with R 134.a fluid.
b) - Using draining/filling equipment fitted with an oil decanter.
- Drain the R 134.a fluid from the system in accordance with the instructions in the equipment handbook.
- Measure the amount of oil recovered.
- Add the same amount of NEW oil when filling the system with R 134.a fluid.
c) - Replacing a compressor.
- Remove the old compressor, drain it and measure the oil quantity.
- Drain the new compressor (supplied full), so that the same amount of NEW oil is left in the compressor as was in the old compressor.
- No more oil should be added when filling the system with R 134.a fluid.

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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 dryer.
- Drain as much oil as possible (when replacing the faulty component).
Either before or during filling of the system with R 134.a fluid, introduce 80 ccof NEW oil into the system.
AIR
CONDITIONING
251

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CONDITIONING
252
CHECKING PRESSURES (continued)
Low pressure
too low
- Insufficient fluid charge.
- Constriction of the HP system.
- Dirty pressure control valve.- Cooling fan speed unsuitable.
- Faulty compressor.- Faulty pressure control valve.
- Faulty compressor.
- Faulty compressor.
- Dirty evaporator.- Circuit normal. - Cooling fan speed unsuitable.
- Faulty pressure control valve.
- System blocked.
- Water in the system.- Presence of solid matter in the
system.
- Dirty condenser.- Excessive fluid charge.
- Dirty condenser.
- Faulty pressure control valve.
- Cooling fan speed unsuitable. High pressure
too low
High pressure
normal
High pressure
too highLow pressure
normalLow pressure
too high
Checking the pressure at temperatures between 15°C and 35°C for information only.
In general, the pressure should be approximately :
- forR134.afluid, less than 2 Bars(Low pressure), and between 13and 24 Bars(High pressure).
CHECKING THE EFFICIENCY OF THE AIR CONDITIONING SYSTEM