1981 Citroen CX Controls

Downloaded from www.Manualslib.com manuals search engine 10 OPERATION No MA. 510-00 b : A ,tnrt g ’
( O.fjtft 91 107 5 ) TABLE OF FUSES
Supply to
I
Fuse
Circuits protected
Rating Colour
Heater unit relay 16 A Mauve Heater unit
Positive terminal of
battery (( + u 16
A Red Stoplamps
Accessory terminal
Glove-box lighting
E Direction indicators
Windscreen wipers and washers
Horns
Ignition
SW itch
Warning lamp panel ( Battery
meter ( thermal voltmeter ) -Brake pad wear warning
lamp -Fuel gauge- Oil pressure warning lamp - Hydraul.
fluid pressure warn. lamp-Water temp. warning lamp )
Tachometer, (( STOP)) warning lamp
16 A Green Interior lamp
Boot lamp
Cigar lighter
Clock
Hazard warning lamps
Voltage regulator
Reversing lamps
Ignition Heated rear window
switch
E Handbrake warning lamp
Rear screen washers and wiper
Window-winder relay
Lighting switch 16 A
10 A White
Yellow R.H. switch - R.H. window-winder
L.H. switch - R H. window-winder
Ashtray lighting
Cigar-lighter lighting
Heater controls lighting
Instrument panel lighting : Clock
Battery meter
Odometers
Sidelamp warning lamp
L.H. sidelamps, front and rear
10 A Blue R.H. sidelamps. front and rear
Number plate lamp Cl RCU IT DIAGRAM

Downloaded from www.Manualslib.com manuals search engine Op. MA. 510-00 b 11 DESCRIPTION OF COMPONENTS
lent.
lark Description and Location Ident.
mark Description and Location
1
Front R.H. sidelamp
........................ 79
54 Switch for L.H. window-winder
..... ....... 52
Front R.H. direction indicator
.............. 26 55 Flasher unit
26 ....................................
2 R.H. headlamp - main beam ............... 83 Lighting for heater controls
................... 73
L dipped beam
........... 81 “5;
Switch for interior lamp
10 ..........................
4 Horn
.... 46 58 Switch for heated rear window
................ 19 ..................................
5 L.H. headlamp main beam
82 59 Rear screen wiper switch
.................... 15
Front L.H. sideli?pped..beam ... 80 60 Contact for handbrake
..................... 21
6 ............... ..
74 61 R.H. control unit ( lighting )
............... 77
Front L.H. direction indicator
............ 21 Lighting rheostat for tacho and speed0
.... ..3 3
8 H.T. Sensor .................................
69 62 Lighting for instrument panel
........ 73-74
9 Ignition coil
........................... 66
Tachometer .............................
69 10
Blower motor ...............
.................
63 Battery meter (thermal voltmeter )
........ 31 11 starter
...............................................
3 Fuel gauge unit ................ ..... ...... 30
12 Alternator ............................................
5 Lighting for odometers
...................... 32-33 13 Distributor
.... ......... .......... ..........................................
66 Clock and lighting
29-72 14
Electric fan thermal switch 64 Warning lamp for heated rear window ......
................. 20
15
Compressor for horns ........................... 48 Warning lamp for dipped beam
................. 80 16
Compressor relay .............................. 47 Warning lamp for brake pads
................... 32 1’;
Battery ...........................................
1 Warning lamp for oil temp. ...................... 40
Voltage regulator .............................. 6 Warning lamp for water temp. ............. 34
19
Sensor for No. 4 cylinder ....................
69 Red (( STOP )) warning lamp ..... ..... 36-38
:: Windscreen washer pump ....... ................. 45
Warning lamp for hydraulic fluid pressure 36
Socket for fault-finding (diagnostic )
.... 70 Warning lamp for hazard warning
....... 22 23
Oil pressure switch ..........................
39 Warning lamp for sidelamps .......
.......... 75 :“5
Idle cut-off ....................................... 65 Warning lamp for direction indicators ...... 28
Oil temperature switch ..................... ... .. 40 Warning lamp for main beam
........... 82
:; Coolant temperature switch
.....................
35 ,Warning lamp for handbrake
............... 21
T.D.C. sensor .......................................... 68 63
L.H. control unit
28 Switch for reversing lamps ....................... 8
Direction indicators and hazard warning
24
29 Relay for window-winder ........................
54 1
Horns 46 .............. ............... ..........
30 Relay for heater unit
........................
50 Windscreen wiper motor
.. .............. 43
31
Relay for electric fan ................
63 Windscreen washer pump .................... 45
32
Front R.H. brake unit
.................... 34 64 Fuel gauge rheostat ..............................
30
33 Windscreen wiper motor ........................... 12
................ 43 65 Rear interior iamp
34 Blower motor 50 66
Rear screen washer pump ...................
17
................... ................. 35
Stoplamp switch
58 67 Rear screen wiper motor
.......................... 13
..........................
36 Hydraulic fluid pressure switch
37 68 Heated rear window ...............................
19
..............
;‘8 Fuse box 8-49-50-54-74-77 ;; Rear screen wiper timer ....................
15
............. .........
Front L.H. brake unit
............................... 31 Rear R.H. lamp cluster
39 Front R.H. door lighting switch’
............ 10 Sidelamp
.......................................... 78
10 R.H. window-winder motor
................... 56 Stoplamp ..............................................
53 11
Glove-box lighting 59 Direction indicator ..................................
24 ...... ...........................
42
Lighting for ashtray 72 Reversing lamp ... ........... ............ .......
9 .....................
43 Accessory terminal (radio ) .................. 56 71
R.H. number plate lamp .......................... 75
44
Lighting for oil gauge ........................ 38 72 L.H. number plate lamp ............... ... ....... 77
45
L.H. front door lighting switch
...........
9 73 Rear L.H. lamp cluster
46 L.H. window-winder motor
76 ..................... 52 Sidelamp
.............................................
47 Central interior lamp 57
..........................
10 Stoplamp
..........................................
48
Cigar-lighter and lighting ...............
9-71 Direction indicator 23 .........................
49 Handbrake warning lamp flasher unit ....... 20 Reversing lamp
8 ................................
50 Anti-theft switch
.......................... 4-8-4966
53 Switch for R.H, window-winder
............ 56 IDENTlFlCATlON OF WIRING HARNESSES
No mark
RD
LMG TB
co UF
Front wiring harness RG Rear L.H. harness
Rear R.H. harness H Rear door harness
Engine harness D
Diagnostic harness ( fault-finding )
Window-winder MC1
Centre console earth lead
Instrument panel MC2 Centre console earth lead
Compressor FV
Flying lead
Front brake pad wear CFR Reversing iamp switch harness

Downloaded from www.Manualslib.com manuals search engine Op. MA. 510-00 b 19 ELECTRONIC FUEL INJECTION ( i/ 1077 -)
TABLE OF FUSES ( LHD )
SUPPlY Fuses
Circuits protected
Ratinq Colour
Lightinq for qlove-box, bonnet and boot
Centre and rear interior lamps
Accessory terminal
Front L.H. mirror
16 Amps Green (F-2)
Flasher unit. and handbrake warninq lam1
Anti-theft
E Water temperature gauge
switch Cigar lighter
Reversinq lamps
Heated rear window, and warning lamp
+ )) Battery terminal
Instrument panel fuel gauge and low fuel
warninq lamp
Anti-theft
switch Liqhtinq for speed0 and tacho ( Rheostat )
16 Amps
(RFe3d)
_ Battery meter (thermal voltmeter ).
tachometer, warning lamp for brake pad
wear, coolant and engine oil temp. 1
enqine oil and hydr. fluid pressure.
direction indicators ( flashing )
Direction indicators
Voltage requlator
Windscreen wiper and washers
Horn
Windinq for relays for heater unit front
window-winders and horn compressor
Hazard warning lamps
Stoplamps
Clock
Winding for r-elays, for front and rear foglamps
Front and rear, L.H. and R.H. sidelamps, + warninq lamp
Number plate lamps
Lighting switch 10 Amps Yellow Liqhtinq for instrument panel (battery meter. clock. odo-
meters )
(Fl) Lighting for iqnition switch, cigar-lighter, ashtray, water
temp. gauge and heater controls.
Map-reading lamp and fuse ( 5 Amps )
10 A.mps Blue
(F4) Rear foglamps and warninq lamp
Relay for window-
winder 16 Amps White
Front L.H. and R.H. window-winder motors (FE)
Relay for air-
conditioning 16 Amps Mauve
(F5) Air blower
Air-conditioning, compressor clutch, windinq for L.H.
electric fan relay, idlinq speed control electro-valve
( according to model )
Alternator 81) Amps
Incorporated fuse ( on printed circuit ) Components not protected
: Starter, and horn compressor
- OII anti-theit .switrh : ignition circuit, E.C.U. and injector relay, petrol pump, electric fan relays and electric
fans
- cm lighting switch : main and dipped beam headlamps and warning lamps, front foglamps, winding for rear foglamp
cut-out relay.

Downloaded from www.Manualslib.com manuals search engine IV. DISTRIBUTION FLAP ( Vl) CONTROL
Flap V 1 is controlled by C 1. It is controlled pneumatically by vacuurr
The vacuum intake is at the carburettor
The flap is controlled by a pneumatic piston subjected to vacrrum via a switch When control C 1 is positioned
between the small blue square and the red square the piston,in the switch is lifted ( fiq ( A ) ) vacuum intake
is cut off’ the supply pipe to the pneumatic piston is at atmospheric pressure flap V 1 blanks off intake E 2, and
air drawn into the intake on the bonnet comes from outside With the engine runninc and control C 1 positioned
between both blue squares ( fiq. ( B ) ) the piston in the switch comes down under the action of its spring.
supply
pipe to the pneumatic piston is no lonqer under atmospheric pressure but under the action of the vacuum, and
flap V 1 via the pneumatic piston blanks off intake E 1’ the air drawn in comes from the passenqer compartment,
( recycling position ).
NOTE Identification mark for fittinq the one way valve the outer diameter is reduced on the side of the 3-way union V. FAST IDLING SPEED CONTROL
This control allows for a faster idling speed when the compressor is operatinq
A vacuum capsule incorporated in the carburettor slightly opens the first choke butterfly by means of a small rod.
The amount of opening is adjustable by means of a screw on top of the vacuum capsule.
An electromvalve fitted to the R.H side of the front subframe and supplied at the same time as the electro-maqnetic
clutch for the compressor controls the supply of vacuum to the capsule. t FRONT
Vacuum intake
Carburettor /
Vacuum capsule
Pneumatic p Towards flap V 1
Action of vacuum
I (Cl in recyclinq
position 1
vale
Vacuum switch
7 1
- Vacuum
-- - - Atmospheric pressure

Downloaded from www.Manualslib.com manuals search engine Operating principle :
Both electric fans ( 12) and ( 14) cool the engine coolant in the radiator. Electric fan ( 14) cools the condenser
when the compressor expels the air-conditioning cooling fluid under pressure.
Simultaneous supply to fans (12) and (14) :
This is carried out by means of contacts in relays ( 1 ) and ( 9). The fl ow of current in the energizinq winding of
relays ( 1 ) and ( 9) therefore operates both electric fans simultaneously.
The relay windings are supplied when
- ignition is switched on
*
thermal switch ( 13) controlled by the coolant temperature in the radiator is off. _-
Supply to supplementary electric fan ( 14) alone :
This is carried out by contacts in relay ( 8) when its energizing winding is supplied
The relay winding is supplied when
- ignition is on
- air-conditioning switch ( 4) is off
a
contact on the ambient temperature thermostat ( 3) is closed.
Supply to the electro-magnetic clutch for the compressor :
The clutch supply is a function of the following
- Air-conditioning switch (4)
- Ambient temperature thermostat ( 3 )
-
High pressure switch ( 5).
Supply to the blower ( 15) :
This is carried out by resistors ( 16) of the rheostat. This rheostat controls the speed of the blower ( 3-speed )
and consequently, the volume of displaced air.

Downloaded from www.Manualslib.com manuals search engine OPERATION No MA. 640-00 : (hnrnct~~tis~ics md special jenttrrvs of the nir-
coi~ditiouing systcw. 1 Op. MA. 640-00
7
VII. WIRING DIAGRAMS FOR COOLING FAN AND AIR-CONDITIONING SYSTEM CONTROLS
7.; 1976 - Special features :
From 1977 models, the fast-idle electro-valve ( 9) is manufactured by (( PIERBLJRG )).
When it is not energized. the electro-valve lets low pressure through to.wards the carburettor capsule (fast-
idle ) I contrary to the (( WEBER )) electro-valve fitted previously.
Fitting the (( PIERBURG )) electro-valve necessitates fitting a relay (8) which is energized when the air-
conditioning system is operating. This relay with its N open )) contact cuts off supply to electro-valve ( 9)
which therefore produces fast-idle.
The rest of the operation is identical to the preceding diagram. DESCRIPTION OF COMPONENTS :
1
- Heater relay ( standard )
2 - Air blower ( Stmdnrd )
3 - Speed control for blower f Stnudnrd )
4 - Regulating thermostat
5 - Air-conditioning switch
6 - Pressure switch ( on dc-wnkrivg t~rrk ,)
7 - Compressor cl.utch
8 - Control relay for fast-idle electro-valve
9 - Fast-idle electro-valve
10 - Relay f0r’L.H. supplementary electric fan ( air-rorzditio)litlg J 11
i Supplementary L.H. electric fan ( cooliug )
12 - Relay for L.H. supplementary electric fan ( cooling ) 13
- Control thermostat ( on radiator ) for electric fans ( Standard ) 14
- Relay for R.H. electric fan ( Stmzdurd 1
15 - Electric cooling fan ( Stnrrdurd )
e
P.T.O.

Downloaded from www.Manualslib.com manuals search engine OPERATION No MA. 642-W : ~Thnracteristics o/ thy, e I:Ko/I) - -70 3 hc,nriug s, stew Op. MA. 642-00 3
When starting : capsule is subjected to vacuum
Vacuum capsule
Westaflex tube
c J
J
COLD AIR
Closing plate for
SUPPLY SHUT OFF warm air supply
,
Flap B
I
to air filter
DIAGRAM.No. 1
‘acuum capsule not under vacuum
Flap
DIAGRAM No. 2
to air filter
Situated at the air-filter inlet. the vacuum capsule controls a flap and a closing plate allowing simultaneously supply
or no supply of warm air and no supply or supply of cold air. When starting ( Diagram 1 ) the capsule is subjected to
vacuum, the flap stops the supply of cold air, and the closing plate allows the supply of warm air to the air filter.
When the effect of the vacuum ceases, the capsule returns to length Ll ( Diagram 2 ) : the flap.opens, allowing supply
of cold air and the closing plate stops the supp[y of warm air.
The vacuum capsule operates via a thermal sensor.