2005 CITROEN C6 heating

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ENGINE
COOLING SYSTEM SPECIFICATIONS
Engine: DT17BTED4
(1)Header tank
(2)Coolant outlet housing
(3)Coolant/oil heat exchanger
(4)Coolant/EGR heat exchanger (rear cylinder bank)
(5)Bleed screw
(6)Heater matrix
(7)Additional heating unit
(8)Engine cooling radiator
(9)Engine cooling radiator drain tap
(10)Coolant/EGR heat exchanger (front cylinder bank)
B1GP0D4P
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CLUTCH
GEARBOX
TRANSMISSION
PROCEDURE PRIOR TO OPERATIONS: AM6 AUTOMATIC GEARBOX
If a gearbox malfunction occurs, there are two possible configurations
depending on the seriousness of the fault:
- Gearbox in back-up mode with a replacement programme of (the fault
values are taken in substitution).
- Gearbox in back-up mode with an emergency programme (3rd hydraulic).
WARNING: In the emergency programme, an impact is felt when
changing P/R or N/R.
Reception of the customer.
Discuss with the customer, to find out all the malfunction symptoms.
Oil quality.
If the gearbox has suffered a serious fault resulting in a malfunction or
the destruction of a clutch, the oil will overheat and become
contaminated with impurities: the oil is said to be «burnt».
This is characterised by a black colour and the presence of an
unpleasant smell.
ESSENTIAL: The gearbox must be replaced.Oil level.
Preliminary conditions:
- Vehicle horizontal, parking brake off.
- Check that the gearbox is not in back-up mode (using a diagnostic tool).
- The oil temperature should be 60°C (+8, -2)(using a diagnostic tool).
- Press on the brake pedal, change through all the gears.
- Place the gear lever in position P.
With the engine running at idle, without power consumers (aircon,
heating, etc.):
- Remove the oil level plug.
The oil should flow out, then drip-drip.
Refit the oil level plug (the oil level is correct).
The oil does not flow out through the oil level plug (see operation: drain
fill - bleed the gearbox).
Engines: ES9A - DT17BTED4
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CLUTCH
GEARBOX
TRANSMISSION
DRAINING, FILLING AND TOPPING UP THE AM6 AUTOMATIC GEARBOX
Thread of oil, then "drip-drip".
Refit the level plug (2).
Tighten the plug (2)to: 0.8 ± 0,1 mdaN.
"drip-drip" or nothing.
Refit the level plug (2).
Stop the engine.
Add 0.5 litreof extra oil into the gearbox.
Repeat the topping-up procedure.
NOTE:The level is correct when the thread of oil becomes "drip-drip".
Refit the level plug (2)(with a new seal).
Tighten the plug (2)to: 0.8 ± 0,1 mdaN.
Refit the filler plug (3)(with a new seal).
Tighten the plug (3)to: 4 ± 1 mdaN.
A level of oil that is too high can have the following consequences: Abnormal overheating of the oil, leaks of oil
causing a level which is too low resulting in destruction of the gearbox.
B2CP3WZCB1BP317C
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AIR
CONDITIONING
CHECKING THE EFFICIENCY OF THE AIR CONDITIONING SYSTEM
Reminder (for information)
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 Origins Solutions
SR < 2°C Lack of aircon fluid in the aircon condenser
Add some aircon fluid
2°C < SR <4°CLack of aircon fluid in the aircon condenser
4°C < SR < 10°C/12°CCorrect quantity
SR > 10°C/12°C
Excess aircon fluid in the aircon condenser Remove some aircon fluid
SR > 15°C
Over-heating.
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 Origins Solutions
2° < SC < 15°CCorrect quantity
SC > 15°CLack of aircon fluid in the cooling circuit Add some aircon fluid
SC < 2°CExcess aircon fluid in the cooling circuit Remove some aircon fluid
Blown air temperature.
The blown air temperature should be between 2°Cand 10°C.
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AIR
CONDITIONING
CHECKING THE EFFICIENCY OF THE AIR CONDITIONING SYSTEM
Aircon circuit diagnosis table (for information)
Principal problem Symptom Possible causes
Low pressure normal and high pressure too high Presence of air in the aircon circuit
Low pressure normal and high pressure too lowAircon pressostat defective
Evaporator sensor defective
Abnormal levels of pressure Low pressure too high and high pressure normal Aircon pressure reducer jammed open
Filtering and drying cartridge saturated or
Low pressure too low and high pressure normal clogged
Aircon pressure reducer iced up
Under cooling too weak Lack of aircon fluid
Air conditioning operating inExcess aircon fluid
back-up mode
Under cooling excessive Presence of air in the aircon circuit
Filtering and drying cartridge clogged
NOTE: In all cases, measure the excessive heating (SC)and the blow air temperature.
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