1981 Citroen CX relay

Downloaded from www.Manualslib.com manuals search engine Op. MA.IE 444-O 15
3. Fuel pump feed ( with engine running ) : ( DIAGRAM 3 )
- Disconnect the E.C.U.
- Disconnect from the air-flow sensor the air hose to the butterfly housing
- Switch on the ignition:
- Actuate the air-flow sensor flap by hand’ when the petrol pump contact closes the pump should be heard
working.
If not, test the circuit using a
battery operated ohmmeter, without forgetting to test between terminal G 36 ))
on the air-flow sensor and terminal H 20 .)) on the E.C.U. for continuity ( The 2nd terminal is not connected
to the E.C.U. ).
- The resistance between terminals (( 86 b H and G 85 )) on the relay box f //j/nor thc~ I~./I. h<~ntllnr~tp ) must be
between 52 and 78 12.
P 4. Supplementary air control ( DIAGRAM 4 )
4
c
5
6
- Disconnect the E.C.U.
-E
? - Check that the supplementary air control is properly connected ( arrow on the casing )~
In
If it is fitted the wrong way round. the port may be blocked.
- The resistance between terminals (( 34 1, and (( 48 )) on the- supplementary air control must be 50 Q approx-
- Visual checking the port on the supplementary air control must be open when the engine is cold, and closed
when the engine temperature is above 60” C
- With the engine cold. if the air pipe to the supplementary air control is flattened the engine rpm must decrease.
With the engine warm, if the air pipe is disconnected, the engine must accelerate.

Downloaded from www.Manualslib.com manuals search engine TABLE OF FUSES
Current supply
findow operation
ontrol relay Fuses
Equipment protected
Capacity Colour
Right-hand switch -Right-hand window winder
16 A White
Left-hand switch - Left-hand window winder
Ieating relay 16 A Mauve Heating unit
Stoplamps
Accessory terminal
Glove box lamp
‘ositive battery
erminal (( + )). 16
A Red Direction indicators
E Instrument panel
Lighting -- Windscreen wiper
switch Horns
Heating relay ( coil )
Window winder relay ( coil )
‘ositive battery
erminal (( t 1) 16 A Green Interior lamp
Boot lamp
Cigar lighter
Clock
Hazard warning lamp
Lighting
switch
E
Voltage’ regulator
Reversing lamps
Rear window heater
Ash-tray lighting
10 A Yellow Lighting for cigar lighter
Heating control lighting
Dashboard lighting
,ighting switch Side- and tail lamp warning lamp
Left-hand sidelamps and rear lamps
10 A Blue Right-hand sidelamps and rear lamps
Number plate lamp Cl RCUI T DIAGRAM
r>

Downloaded from www.Manualslib.com manuals search engine OPERATION No MA. 510-00 : \m//l‘!yc~tl/ <‘,/I 0 t Ih<’ <‘It,< Ir.itnl iusrtlllnliritt Op. MA. 510-00 3
f 0 lO7i-l,‘1975 )
DESCRIPTION OF THE COMPONENTS
!ep. Description and Position Rep. ‘D escription and Position
1
Right hand sidelamp ...... 74 51
Flasher unit .. ....... 21
Front right hand direction indicator ..... 21 52 Lighting and starter switch .... .4 8’44- 61
2 Right-hand headlamp Main beam .. 78 5.3
76 54 Petrol gauge rheostat ........ 25
Dipped beam
Right hand window winder control switch
3 Right~hand horn ............ 42
( O/)liWlNl J ................. 51
4 Left-hand horn ...
41 55 Heating control illumination f ~///io~n/) .. 68
5 Left-hand headlamp : Main beam ....... 77 56
Left hand window winder switch ( O/JI~OII~/~~~
Dipped beam ...... 75 57
Heated rear window switch Op/io~nl j ...... 14
6 Front left-hand direction indicator ... 16 58
Lightinq switch unit ............. ........... 72
Front left hand sidelamp ................. 69
Speedometer and tachometer lighting
8 Electric fan thermal switch .................. 59
rheostat ....... ...... .................... 28 10
Electric fan .......
58 59 Instrument panel : 11
Starter ...... ... .............. .......... 3
Thermal voltmeter and illumination .. 26-28 12
Alternator ............................ ........ 5 13 Petrol gauge and illumination ............ 25-69
Ignition coil ... ......... .............. 61 14
Speedometer and tachometer lighting 28
High tension sensor ....................... 64
Clock and clock illumination ....... 1667 15
Compressor for horn ............ ..... ...... 43
Heated rear window warning lamp ....... 15 16
Compressor relay ................... ..... 43
Headlamp dipped beam warning lamp ... 75 17
Battery ............. .... .. 1
Brake pad wear warning lamp .......... 27 18
Voltage regulator ......................... 6
Oil temperature warning lamp ............ 35
19
HT sensor for No. 1 cylinder ........... 64
Coolant temperature warning lamp ....... 29 20
Distributor ..................... ...........
61 Emergency stop warning lamps 32” 34
21
Windscreen washer pump ............. 36
Hydraulic pressure warning lamp ...... 31 22
Plug for diagnostic operations ............. .65
Warning lamp for hazard warning.. ...... 17 23
Engine oil pressure switch .............. .. 34
Sidelamp warning lamp ................... 70 24
Idle cut-off ....................... .60
Direction indicators warning lamp ........... 23 25
Engine oil temperature switch ........... 35
Headlamp main beam warning lamp ... 77 26
Enqine coolant temp. switch ... 30 60 Left-hand control panel : 27
Top dead centre sensor ........................ 64 Direction indicator and hazard warning 19 28
Reversing lamp switch ........................ 8
- Horns .................................... 41 30
Window winder control relay( Optior~nl ) .. ..4 9
Windscreen wiper motor ............... 38-39 31
Heating relay ............ ..................... 45
- Windscreen washer pump .......... . .......... 37 32
Electric fan relay ................................ 58 61
Rear right-hand lamp cluster 33
Front right-hand brake unit ................. 28
- Rear lamp ............................................... 73 34
Windscre,en wiper motor ........................ 38
- Stoplamp ............. .....
............ 53
35
Blower motor ............ .............................. 45
Direction indicator ................................... 19 36
Hydraulic pressure switch ...................... . 32
- Reversing lamp ..................................... 9 37
Stoplamp switch.. ......................................... 53 62
Boot lamp ................................................. 12 38
Fuse boxes ..... 8-44-45-49-69-72 63 Rear window heating element ................... 14 39
Front left-hand brake unit .......................... 26 64
Right-hand number plate lamp ................. 72 41
Front right-hand door switch ................... 11 65
Left-hand number plate lamp ................... 70 42
Right-hand window winder motor f Optiollal) 51 66
Boot lamp switch ........................................ 12 43 Glove box
lamp ...................................... 51 67 Rear left-hand .lamp cluster 44
Front left-hand door switch ........ .......... 10 - Rear lamp ................................................ 71 45
Left-hand window winder motor (Oplio~fll) 47 s Stoplamp ........................................... 52 46
Interior lamp ................................................. 10
- Direction indicator lamp ..................... 18 47
Cigar lighter and illumination ............... .13-67
- Reversing lamp .................................... 8 48
Accessory plug ..... ... .......................... .... 50
49
Ashtray illumination ,., ... ................ 66 DESCRIPTION OF THE WIRING HARNESS
lot marked :
Front harness co Compressor harness AR
Rear harness C Boot harness
M Engine harness PC
Boot lid harness LG
Window operation D Fault finding harness ( Diagnostic) TB
Instrument panel harness FV Flying lead

Downloaded from www.Manualslib.com manuals search engine TABLE OF FUSES
Supply to
eater unit relay Fuse
Circuits protected
Rating Colour
16 Amps Mauve Heater unit
S toplamps
Accessory terminal
Glove box lightinq
Positive terminal
of battery u + )) 16 Amps Red
E Direction indicators
Ignition Windscreen wipers and washers
switch Horns
Heater relay windinq
Window-winder relay winding
Rheostat -speedometer lighting
Warning lamp panel ( Battery
meter ( Thermal voltmeter-- Brake pad wear warning
lamp - Fuel gauge - Oil pressure warning lamp -
Hydraulic fluid pressure warning lamp-Water temp.
warning lamp )
16 Amps Green Interior lamp
Boot lamp
Cigar-lighter
Clock
Hazard warning lamps
E Voltage regulator
Iqnition Reversing lamps
switch
Rear window heating element
Handbrake warning lamp
Window winder relay 16 Amps White R.H. Switch 0 R.H. window winder
L.H. Switch- L.H. window winder
Lighting
Switch 10 Amps Yellow Ashtray lighting
Cigar lighting
Heater controls lighting
Instrument panel lighting Clock
E Battery meter
Odometers
Sidelamp warning
L.H. sidelamps, front and rear 1 amp
Lighting
Switch 10 Amps Blue R.H. sidelamps, front and rear
Number-plate lamp CIRCUIT DIAGRAM
>
P.T.O.

Downloaded from www.Manualslib.com manuals search engine OPERATION N” MA. 510-00 a : Arrnr~g(,v~ ('I, I 0 / Ih CJ c~lvclric-cil irtslnllc7liori Op. MA. 510-00 a 3
(I.‘1975 -7 1975 J
-
den{
lark
i
6
8
9
0
1
2
3
4
5
6
7
8
9
!l
!2
!3
!4
!5
!6
!7
!8
$0
)l
12
33
34
35
36
37
38
39
41
42
43
44
45
46
47
- DESCRIPTION OF COMPONENTS
Description and Location
‘ront R.H. sidelamp ................................... 74
‘rant R.H. direction indicator .................. 21
1.H. headlamp main beam ................. ..... 78
dipped beam ... .................. 76
3.H. horn 42 .............................................
,.H. horn ....................... ............. ............. 41
,.H. headlamp main beam .......................
77
dipped beam .................... 75
‘rant L.H. sidelamp .........
........................
69
:ront L.H. direction indicator .................. 16
I.T. sensor ............................................ 64
qnition coil ..............................................
61
3lower
motor .........................................
58
;tarter ...................................................... 3
Alternator ..................................................... 5
Xstributor 61 ...................................................
7lectric fan thermal switch .........................
59
Zompressor for horns ................................. 43
Compressor relay ..... .................
.............. 42
3attery ........... ...............................................
1
Joltaqe regulator ....................... ............. 6
Nindscreen washer pump ............. ............... 40
jacket for fault-finding ( diagnosfic) ....... 65
3il pressure switch .... ....................... ... 34
:dle cut-off ........................................... 60
3il temperature switch
35 .............................
Coolant temperature switch ....................... 30
T.D.C. sensor ......................................... 63
Switch for reversing lamps .......................... 8
Relay for window winder ............................. 49
Relay for heater unit 45
................... ..............
Relay for electric fan 58 ..................................
Front R.H. brake unit 28 ...............................
Windscreen wiper motor .............................. 38
Blower motor ................................................ 45
Hydraulic fluid pressure switch ................... 32
Stoplamp switch ........................................... 53
Fuse box ..... .................... 8-44-45-49-69-72
Front L.H. brake unit ........................... ... 26
Front R.H. door lighting switch ... ............
11
R.H. window-winder motor .......................... 51
Glove-box lighting ....................................... 51
Accessory terminal ......................................
5c
Lighting for pneumatic oil gauge .............. 3:
Front L.H. door lighting switch
.................. I[ L.H .
window-winder motor ........................... .47 DESCRIPTION C
No identification
AR
M
LG
TB
co
Front harness
Rear harness
Ynqine harness
dindow-winder harness
Instrument panel harness
Compressor harness jent.
/ark
4”9 50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
iz
67
68
69
70 Description and Location Central interior lamp ............ 10
Cigar-liqhter and lighting
.............. 13-66
Ashtray liqhtinq ...................................
67
Handbrake warning lamp flasher unit
........ 15
Switch for R.H. window-winder
.............. 51
Switch for L.H. window-winder ................ 47
Flasher unit .............................................. 21
Anti-theft switch ......................... 4-8-44-61
Rheostat for fuel qauqe ............................ 25
Switch for interior lamp ... ....................
9
Switch for heated rear window ...................
14
Liqhting for heater controls ..................... 68
Contact for handbrake
............................... 115
R.H. control unit ( liqhtinq )
................... 72
Lighting rheostat for tacho. and speedo.
28
Lighting for intrument panel ................ 68-69
Tachometer
............................................ 64
Battery meter (thermal voltmeter )
.......... 26
Fuel gauge unit
..... ....... ....... ................ 25
Lighting for odometers
....... ......... .......... 28
Clock and lighting ................................ 24-67
Warning lamp for heated rear window
15 .......
Warning lamp for dipped beam 75
_, .................
Warninq lamp for brake pads ................... 27
Warninq lamp for oil temperature
............ 35
Warning lamp for water temperature
.......... 29
Red u STOP 1) warninq lamp
............... 31-33
Warninq lamp for hydraulic fluid presssure 31
Warninq lamp for hazard warning
17
...............
Warninq lamp for sidelamps .................... 70
Warning lamp for direction indicators ...... 23
Warninq lamp for main beam ................. 77
Warning lamp for handbrake
..................... 16
L.H. control unit
Direction indicators and hazard warning lamps .........................................................
19
Horns .......................................................... 41
Windscreen wiper motor ....... .................. 38
Windscreen washer pump .......................... 40
Rear R.H. lamp cluster
Sidelamp ...................................................
73
Stoplamp ....................... .............................. 53
Direction indicator ......................................
19
Reversing lamp ....................... .............
9
Boot lamp ................................................... I2
Heated rear window 14 .....................................
R.H. numberplate lamp ...............................
70
L.H. numberplate lamp ...........
.................... 72
Contact for boot lamp .............................
12
Rear L.H. lamp cluster - Sidelamp
........ 71
,- Stoplamp
.......... 52
- Dir. indicator .. 18
- Rev. lamp ......... 8
IG HARNESSES
Boot harness
Boot-lid harness
Diagnostic harness
Handbrake harness
Flying lead

Downloaded from www.Manualslib.com manuals search engine 2 OPERATION No MA. 510-00 b : Arratzgement of the electrical installation
( jhrl 9/1975 ) TABLE OF FUSES
Supply to
lelay for heater unit
‘ositive battery
erminal (( + 1) Fuse
Circuit protected
Rating Colour
16 Amps Mauve Heater unit
Stoplamps
Accessory terminal
Glove-box lighting
E Direction indicators
Windscreen washers and wipers
Ignition Horns
switch Winding for heater unit relay
Winding for window-winder relay
16 Amps Red Rheostat
- speed0 lighting
Instrument panel : ( Battery meter
( thermal voltmeter ) - Brake pad
wear warning lamp.-Fuel gauge- Oil pressure and temp.
warning lamps - Hydraulic fluid pressure warning lamp-
Coolant temp. warning lamp )
Interior lamp
Boot lamp
Cigar lighter
Clock
16 Amps Green Hazard warning
E Voltage regulator
Ignition Reversing lamps
switch Heated rear window element
Handbrake warning lamp
Relay for window
winder 16 Amps White R.H. switch u,R.H. window-winder
L.H. switch - L.H. window-winder
Lighting switch Ashtray lighting
Lighting for cigar-lighter
Lighting for heat’er control
Clock
10 Amps Yellow
Lighting for Battery meter and
instrument panel
E. Odometers
Sidelamp warning lamp
L.H. sidelamps front and rear
10 Amps Blue R,H. sidelamps front and rear
Number plate lamp Cl RCU I T DI AG RAM

Downloaded from www.Manualslib.com manuals search engine DESCRIPTION OF COMPONENTS
dent.
Ident.
Description ond Location
n ark Description and Location
mark
1
Front R.H sidelamp
74 53
Switch for L.H. window-winder .,, 47
Front R H direction indicator
21 54 Flasher unit
.... 21
2 R.H. headlamp
main beam
78 55 Anti-theft switch
4-a-44-61
dipped beam
76 56 Rheostat for fuel gauqe
,.. 25
4 Horn
41 57
. Switch for interior lamp .,. 10
5 L.H headlamp main beam
.., .., ,.. 77 58
Switch for heated rear window
14
dipped beam”: 75 59 Lighting for heater controls _.. 68
6 Front L H sidelamp
.,. 69 60
Contact for handbrake .._....
16
Front L.H. direction indicator ,.... ._. _._.. 16 61
8 R.H control unit (lighting )
72
H T
sensor connector ,. 64
Lighting rheostat for tacho and speed0
28
9
Ignition coil ,.,
61 62 Lighting for instrument panel 68-69
10
Blower motor 58
Tachometer
.,.
64 11
Starter 3 Battery meter ( thermal voltmeter ) 26 12 Alternator ..I
5
Fuel gauqe unit 25 13
Distributor
61 14 Lighting for odometers _. 28 Electric fan thermal switch 59
Clock and lighting .._.. .,. 24-67
15
Compressor for horns 43 Warning lamp for heated rear window
15 16 Compressor relay 42 Warning lamp for dipped beam
_.. 75 17
Battery 1 Warninq lamp for brake pads 27 18 Voltage regulator . . . . . . . . . . 6 Warning lamp for oil temp. ,,_.. 35
19
Sensor for No 4 cylinder
64 Warning lamp for water temp. ..._.,,, ,,,,. 29 21
Windscreen washer pump ... .. ......
40 Red (( STOP )) warning lamps
31-33 22
Socket for fault-finding (diagnostic) .‘.‘.... 65 Warninq lamp for hydraulic fluid pressure
31 23
Oil pressure switch 34 Warning lamp for hazard warning
17 24 Idle cut-off .._........ 60
Warning lamp for sidelamps
70 25
Oil temperature switch 35 Warning lamp for direction indicators 23 26
Coolant temperature switch 30 Warninq lamp for main beam .‘..... 77 27 ‘I’D f-, SenSOr 63
Warning lamp for handbrake ... .‘........-.. 16 28
Switch for reversinq lamps ... ... ....... 8 63 L H control unit 30
Relay for window -winder ... ... .‘........ 49 Direction indicators and hazard warning 31
Relay for heater unit 45 lamps .,. .,...._ .,. .._ 19
.,. .._.......... 32
Relay for electric fan 58 Horns 41 33
Front R H. brake unit
.._.. 28 Windscreen wiper motor
..,.... 38 34
Windscreen wiper motor
_.............. 38 Windscreen washer pump
.._...... 40 35
Blower motor, ,._..._._....._._..._........ 45 64 Rear R.H. lamp cluster 36
Hydraulic fluid pressure switch _..._......... 32 Sidelamp .._...... 73
37
Stoplamp switch 53 S toplamp
_. _. _. _. _. _. _. 53
.._..............
38
Fuse box 8-44-45-49-69-72 Direction indicator
19
_.. _._.. 39
Front L.H. brake unit
. .._.._............... 26 Reversing lamp 9 41
Front R.H. door interior lamp switch 10
6665 Boot lamp .._. ._. 13
42
R.H. window-winder motor ..- 51 Heated rear window
14 43
Glove&or lightinq .._............ 51 67 R.H. number plate lamp 70
44
Accessory terminal 50 68 _..,......... L.H. number plate lamp
72 45
Lighting for pneumatic oil qauge 33 h9 Contact for boot lamp .._.. .._. .._........ 12 46
Front L.H. door interior lamp switch 9 70 Rear L.H. lamp cluster
- Sidelamp
71 47
L.H. window-winder motor ..: 47 - Stoplamp .._._... 52
48
Central interior lamp
10 - Direct. indic. 18 49
Cigar-lighter and lighting 9-66 - Reversing lamp 8
.._....
50 Ashtray lighting 67 71 Map-reading lamp f Pnl/ns ) .._..._....._.
66
_._......._...................... 51
Handbrake warning lamp flasher unit .._._.._ 15 72-73 Rear R.H. and L.H. door int. lamp switches 52
Switch for R.H. window-winder _..._.. 51 (P(/llgs ) 1 l-12 74-75 Rear R.H. and L.H. int. lamps ( f’nlins ) 1 l-12 DESCRIPTION OF WIRING HARNESSES
No identification PC
Boot lid harness mark
Front harness D <( Diagnostic )) harness AR
Rear harness P.AR Rear interior lamps.harness f I’n//nc )
M Engine harness F
Rear door interior lamp switch harness (Pflj/~.s LG
Window-winder harness MC1 Centre console earth lead( Pall~.~,’ S~/jczr ) TB
Instrument panel harness MC2 Centre console earth lead
co Compressor harness Flying lead UF
Front brake pad wear harness C: Contact harness for reversing lamps
C Boot harness

Downloaded from www.Manualslib.com manuals search engine TABLE OF FUSES
Supply to Fuse
Colour Rating Circuit protected
‘Air blower
Fast idle electro-magnet
Air-conditioning relay Mauve 16 Amps Fast idle relay
Compressor clutch
Relay for L.H. air-conditioning blower
Positive terminal of
battery (( t )) Red
Green Clock
Hazard warning
Stoplamps
Idling speed cut-off
Voltage regulator
16 Amps
I’ Horn
Anti-
Relay for compressor horn
theft Windscreen wiper and washers
device Instrument panel (lighting rheostat
battery meter. warning lamps for oil
pressure and temp., brake pad wear,
coolant, oil gauge lighting)
Direction indicators
Relay for front window-winder
Heater unit relay
E Relay for rear window-winder
Cigar-lighter on centre console
Exterior mirror
Anti- Water temperature gauge
theft Reversing lamps
16 Amps device Heated rear window
Handbrake warning lamp on instru-
ment panel
Glove-box lighting
Centre and rear interior lamps
Bonnet lighting
Boot lamp
Accessory terminal (radio 1
Front window-winder relay
Lighting switch White
Yellow 16 Amps L.H. & R.H. switches L.H. 6 RH. window-winder
Map-reading lamp ( + 5Amp. in-line fuse )
Lighting for heater controls
10 Amps Lighting for ashtray and cigar lighter
Lighting for water temp. gauge and intrument panel
Sidelamp warning lamp
L.H. and R.H. sidelamps. front and rear
Number plate lamp
Fog-lamp switch White 10 Amps Fog-lamp warning lamp
L.H. and R.H. fog-lamps
(( + 1) Battery terminal
Relay for rear window-
winder Yellow
White 16 Amps L.H. and R.H. rear cigar-lighters
16 Amps Switches -L.H. and R.H. window-winders, rear
-.. -- . ..-...- . . . -..---m-
IDENTIFICATION
OF WIRING HARNt33t3
AV Front ( no identification of circuit diagram) PD Rear R.H. door
C Boot PG
Rear L.H. door
co Compressor PR
Rear doors
M Engine Rear PC
Boot lid TRS Instrument panel Cl RCUI T DIAGRAM
L3
P.T.O.