check engine Citroen C3 2004 1.G Workshop Manual

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ELECTRICAL
SYSTEM
CHARGING CIRCUIT ALTERNATOR WITH MONOFUNCTION REGULATOR
Checking the alternator output.
Connect as shown in the diagram opposite, using an ammeter (A), a voltmeter (V),
and a rheostat
(R)or a Volt/Ammeter/Rheostat combination.
Referring to the vehicle’s equipment specification
(see table opposite), adjust the
engine speed and rheostat charge to obtain
U = 13.5 V.
Reminder:The excitation energising current will flow through the warning lamp;
check that the warning lamp comes on when the ignition is switched on. It shouldgo out when the engine has started
(accelerate slightly).
Checking the voltage regulator.
Set the rheostat to zero and disconnect all the electrical consumers.
Display
3000alternator rpm. If U alternator is > 14.7 V, the regulator is faulty.
Note:These tests should be performed with the engine hot and the battery fully
charged.
Method of reading the alternator speed.
Fit a reflecting shim on the pulley of the alternator.
Adjust a stroboscope to the frequency equivalent to the control speed.
(e.g. 2000 rpm = 2000/60 = 83 Hz).
Adjust the engine speed so that the shim appears fixed.
D1AP025C
A: Ammeter.B:Battery.G: Generator.L: Warning lamp.K1and K2:Switch.R: Electric charge.S:Shunt 200mV/200A.V:Voltmeter.1 : Alternator.

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ELECTRICAL
SYSTEM
C5HP073C
SPECIAL FEATURES: AIR CONDITIONING SYSTEM (R 134.a)
Clickfit connector removing/fitting tool
Ø Inch
V ehicle
XSARA
XSARA
PICASSOTT
BP
HP5/8Black
8005T.A
3/8Red
8005T.C Ring colour Tool kit 4164T
Tightening torques (m.daN).
Unions
Steel/Steel
Aluminium/Steel Ø Pipes
1,7 ±0,3
1,3 ± 0,3 M 06
3,8 ± 0,3
2 ± 0,2
M 08
4 ± 0,3
2,5 ± 0,3 M 10
NOTE:Tighten the union to the recommended torque using a retaining spanner whenever possible.
NOTE:For operations concerning draining, drying (empty), checking and recharging of a system:refer to BRE 0290.
WARNING: For R 134.a quantities (see table on preceding page:483).
Aircon compressor fixings.
ESSENTIAL: Tighten the front part of the compressor(timing belt end), before the rear part of the compressor.

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AIRCON
SPECIAL FEATURES: AIR CONDITIONING SYSTEM (R 134.a)
Changing the filtering/drying cartridge
Refitting.
Remove the new cartridge from its packaging.
Do not expose the cartridge, the filter and seals to pollutants.
Lightly oil the seals
(compressor oil).
Remove tool [5] from the reservoir (6).
Insert the new cartridge (5)into the reservoir (6).
Refit the safety circlip (4), using tool [6].
Make sure that the circlip (4)is correctly positioned in its location.
WARNING: Not more than 5 minutes should elapse between the removal of
the cartridge (6) from its packaging and its being fitted.
Refit:
The plastic cap (3), using tool [5] Tighten to 1,2 ±0,1 m.daN.
The condenser (reclip, pushing at «b»and «c»).
The plastic cover and the pins at «a».
The grille (2).
The screws (1).
Proceed to:
Recharge the circuit
(see corresponding operation).
Check the operation of the air conditioning (see corresponding operation).
C4AP167CC4AP165CC4AP164CC4AP163C
C2 C3 C3 PLURIEL

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AIRCON
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 Oring seals (8).
Lubricate the Oring 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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SPECIAL FEATURES: AIR CONDITIONING SYSTEM (R 134.a)
Compressor lubricant
ESSENTIAL: The compressor lubricant is extremely hygroscopic; always use FRESH oil.
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 PRESSUREvalve, 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.afluid from the system in accordance with the instructions in the equipment handbook.
Measure the amount of oil recovered.
Add the same amount of
NEWoil when filling the system with R 134.afluid.
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 NEWoil is left in the compressor as was in the old compressor.
No more oil should be added when filling the system with R 134.afluid.
AIRCONAIRCON

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AIRCON
SPECIAL FEATURES: AIR CONDITIONING SYSTEM (R 134.a)
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 system.

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AIRCON
CHECKING THE EFFICIENCY OF THE AIR CONDITIONING SYSTEM C3 C3 PLURIEL KFV
CHECKING TEMPERATURES (Continued)
Vehicle using R134.a fluid
(Compressor with variable capacity)
Ambient temperature in °C
Temperature
at the central
air vents
in °CEngines
V ehicle
C3
C3 PlurielKFV
22 ± 2 17,6 ± 2 14,4 ± 2 11,5 ± 2 7,6 ± 2 7,2 ± 2
NFU18,5 ± 2 15 ± 2 12,5 ± 2 10 ± 2 8,5 ± 2 6,5 ± 2
8HX 8HW22 ± 2 17,6 ± 2 14,4 ± 2 11,5 ± 2 7,6 ± 2 7,2 ± 2
TU18 ±217 ±214,5 ±211 ± 2 8,5 ± 2
8 ±2
EW19 ± 2 18 ± 2 15 ± 2 12 ± 2 10 ± 2
DW15 ±215,5 ±211 ± 2 9 ± 2 7 ± 2 5 ± 2
All types22 ±3 16 ± 3 12,5 ± 3 10 ± 3 8 ± 3 6,5 ± 3
XSARA
XSARA
PICASSO40 35 30 25 20 15

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26 ± 2 23,2 ± 2 21 ± 2 19,2 ± 2 15,3 ± 2 15 ± 2
4,3 ±2 3,4 ± 2 3,1 ± 2 2,8 ± 2 2,7 ± 2
25,2 ±223,6 ± 2 21,4 ± 2 20 ± 2 17,6 ± 2 14,5 ± 2
3,5 ± 2 3 ± 2 2,8 ± 2 2,5 ± 2 2,4 ± 2
26,2 ± 2 23,2 ± 2 21 ± 2 19,2 ± 2 15,3 ± 2 15 ± 2
4,3 ± 2 3,4 ± 2 3,1 ± 2 2,8 ± 2 2,7 ± 2
CHECKING THE EFFICIENCY OF THE AIR CONDITIONING SYSTEM
Checking pressures
Tools. 1
charging station. 2thermometers.
Once the preliminary conditions, vehicle equipment and checks havebeen fulfilled
(see table). After the air conditioning has been on for
three minutes, record the following parameters: The temperature of the air coming from the central vents
(see table).
The High Pressure. The Low Pressure.
Compare the values recorded with the table below, or the graphs.
Ambient temperature in °C40 35 30 25 20 15
VehiclesEngines
C3
C3
C3 PlurielKFV
NFUHigh pressure (Bars)
Low pressure (Bars)
Low pressure (Bars)
High pressure (Bars)
Low pressure (Bars)8HX 8HWVehicle using R134.a fluid
(Compressor with variable capacity)
High pressure (Bars)
AIRCONAIRCON
C3 C3 PLURIEL XSARA XSARA PICASSO KFV

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AIRCON
23 ± 2 22,5 ± 2 20 ± 2 17 ± 2 15,5 ± 2 14,5 ± 2
3,8 ± 0,2 3,6 ± 0,2 3,5 ± 0,2 3,1 ± 0,2 3 ± 0,2 2,9 ± 0,2
24,5 ±221,5 ±2 18,5 ± 2 17 ± 2 15,5 ± 2
4 ±0,2 3,8 ± 0,2 3,5 ± 0,2 3,2 ± 0,2 3 ± 0,2
21,5 ± 2 22,5 ± 2 20 ± 2 18 ± 2 16,5 ± 2 15,6 ± 2
3,2 ±0,23,3 ±0,23 ±0,22,8 ± 0,2 2,6 ± 0,2
25,5 ±320,5 ±318 ± 3 20 ± 3 13,5 ± 3 11 ± 3
4 ±0,33,5 ± 0,3 3 ± 0,3
25 ± 3 22,5 ± 3 20 ± 3 17 ± 3 15 ± 3
4 ±0,33,5 ± 0,3 3 ± 0,3
CHECKING THE EFFICIENCY OF THE AIR CONDITIONING SYSTEM
Checking pressures
Tools. 1
charging station. 2thermometers.
Once the preliminary conditions, vehicle equipment and checks havebeen fulfilled
(see table). After the air conditioning has been on for
three minutes, record the following parameters: The temperature of the air coming from the central vents
(see table).
The High Pressure. The Low Pressure.
Compare the values recorded with the table below, or the graphs.
Ambient temperature in °C40 35 30 25 20 15
VehiclesEngines
XSARA
XSARA
PICASSOTU
EW
High pressure (Bars)
Low pressure (Bars)
Low pressure (Bars)
High pressure (Bars)
Low pressure (Bars)DWVehicle using R134.a fluid
(Compressor with variable capacity)
High pressure (Bars)
XSARA XSARA PICASSO
High pressure (Bars)
Low pressure (Bars)
High pressure (Bars)
Low pressure (Bars)
TU
EW
DW

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AIRCONAIRCON
AIR CONDITIONING SYSTEM R 134.a
Checks on the air conditioning circuit
C5HP1A5D
Key.
T/P
= Average temperature (°C)at the air vents/
high pressure (Bars).
P= Low pressure (Bars).
Te= Exterior temperature (C°).
HP= Pressure at compressor outlet (Bars).
BP= Pressure at compressor inlet (Bars).
TA = Average temperature (°C)of air blown from the
central vents.
C3 C3 PLURIEL BVA KFV