1988 CITROEN CX relay

“LE JETRONIC” ELECTRONIC FUEL
INJECTION SYSTEM
“LE Jetronic” system
The “LE Jetronic” IS a fuel injectiorl system which injects Intermittently petrol, at low pressure, into the inlet rnanifold
The main characteristic of the device IS to rneter drrectly the air drawn in by the engine, which is the only reference
for the fuel quantity to be injected. The fuel metering IS carried out by electro-magnetically triggered injectors. These
are under a constant fuel pressure.
The quantrty of fuel injected depends on how long the Injectors remain open. The duration of opening is optimally
determined for each engine operating phase by an electronic control unit, from data supplied by various electric
sensors.
The “LE Jetronic” device is composed of:
No.
COMPONENTS MADE BY REFERENCE
142 Electronic Control Unit (E.C. U.) BOSCH 0280 000 300
192 Throttle spindle switch cc 0280 120 301
280 Supplementary air control (C 0280 140 172
302 Flow meter ,, 0280 202 021
345 Electrovalve ,) 0280 141 011
576 Injector n 0280 150 254
683 Electrical fuel pump
)> 0580 464 008
731 Relay D 0280 230 009
841 Water temperature sensor D 0280 130 026
F Fuel filter N 0450 905 002
R Fuel regulator pressure ,) 0280 160 216

“LE Jetronic” system
The “LE Jetronic” is a fuel injection system whrch injects intermittently petrol, at low pressure, into the Inlet manrfold
The main characteristic of the device is to meter directly the air drawn In by the engine, which is the only reference
for the fuel quantity to be injected. The fuel metering is carried out by electro-magnetically triggered injectors. These
are under a constant fuel pressure.
The quantity of fuel injected depends on how long the injectors remain open. The duration of opening IS optimally
determined for each engine operating phase by an electronic control unit, from data supplied by various electric
sensors.
The “LE Jetronic” device is composed of:
No. COMPONENTS MADE BY REFERENCE
142 Electronic Control Unit (E.C.U.) BOSCH 0280 000 224
192 Throttle spindle switch 0
0280 120 313
280 Supplementary air control u
0280 140 178
302 Flow meter ,)
0280 202 061
345 Electrovalve ,,
0280 141 011
575 Cold start injector n
0280 170 409
576 Injector >,
0280 150 200
683 Electrical fuel
pump 1,
0580 464 008
731 Relay >,
0280 230 009
841 Coolant temperature sensor 1)
0280 130 026
870 Slow thermal switch ,>
0280 130 214
F Fuel filter ),
0450 905 002
R Pressure regulator ,)
0280 160 216

ELECTRICITY
MA 510.00011 1
ELECTRICAL INSTALLATION GENERAL OUTLINES
PRESENTATION:
The electrical system operations are composed of:
- A main wiring diagram.
- A circuit diagram.
- Lists of parts,
harnesses,
earth connections,
connectors between harnesses.
- A fuse table.
A lamp chart.
- Various circuit and wiring diagrams for special functions or optional equipment.
I_
UTILISATION:
The wiring diagram indicates the location of the components, harnesses, earth connections and connectors
on the vehicle.
The circuit diagram presents the electrical circuits in a functional way.
- The components symbols in the circuit diagra*m are those shown on the symbol key (see pages 2 and 31.
- Several symbols can be used for a component and the item can be shownC.exploded on different lines
according to the functions.
- Switches are shown at rest, with vehicle stationary, and the doors closed.
- The switches must be moved from right to left.
- The position of a relay coil, generally to the left of the contact switch, is not compulsorily so.
- In cases where the selector switch is complex, the contact movements are shown in the manner to be
considered the most comprehensible.
- The electronic control units are not shown in detail.
Parts list: the parts are in the alphabetical order, and numbered.
The number of the item remains the same on all the diagrams provided the functron has not changed. The
parts list enables any item to be located on the wiring diagram (by means of letters and figures), and on the
circuit diagram (with a vertical line No). The identification of the connector and the ref. letter of the harness
attached to the part are also included in the parts list.
List of harnesses: it gives the position of electrical harnesses on the wiring diagram and the location of each
lead of this harness on the circuit diagram (capital letter in the middle of the wire).
List of earth connections: it indicates the location of the earth connections and the wires or connectors and
the connecting harnesses (letter CC m )), followed by a number).
List of harness inter connections : it indicates,
- the reference of the harness concerned,
- the type of end fittings: I, metal contact or connecting pin,
U, clip or socket,
- the colour of the wire insulator and the marking or sleeve colour code,
- the junction connector: number of channels, colour and channel involved,
- the location of this connector on the wiring diagram,
- the location of each channel of the connector on the circuit diagram.
The harnesses are described in alphabetic order.
8531 8532

JUNCTION BOX MA 510.00/1 1
The junction box is to be found under the dashboard, to the left (right on RHD) of the steering wheel. It combi-
nes most of the electrical functions.
It is presented on page 3, as seen from above, the front of the vehicle being directed to the left.
COMPONENTS:
- 14 fuses (refer to the table)
- A relay for the electric cooling fan
: RI
- A relay for the rear window winder motor
: R2
- A relay for the front window winder motor : R3
- A relay for the heated rear screen
: R4
- A direction indicator unit : c
- A delay/timer unit for the windscreen wiper : I
- Connectors
Connectors:
- 26, all different, can be connected.
’
- They are different by the number of channels and their colour, each colour being attributed a specific casing slot
- They are grouped by columns I to V (from left to right) and stages 1 to 6 max. (from top to bottom).
All these figures are to be found either side of the conductor on the circuit diagram.
How to read the table (page 2):
Example II 1 0 M 9
B
Connector situated in the 2nd column (II), 1st stage (I).
It is a brown (MI 10 channel (0) connector
The lead (conductor) is located in the channel 9 of the connector concerned on the circuit diagram.
Function : lead supplying the clock electrically: + permanent after fuse F7.
Wires and stripes (V H) Green wire with a black stripe.
Position (66): number of the vertical line on the circuit diagram where the channel and the connector in
question are to be found.
The letter positioned below indicates the harness which connects at that place: B (box)
Special features:
The two black 2 channel connectors used, cannot be mistaken: they differ by a 9 mm clip on the one hand
and a 5 mm flat pin on the other hand.
The yellow 2 channel connector and fuse F14 are used in cold countries only.
8531-8532

2 MA
510.00/1 ELECTRICAL JUNCTION BOX
Colour Colour
CJ)
”
2
a,
E --Pi- Function ”
i
-1
5 z 2 iz az?i”; cg Function
,%“~o” -0
2% z 2:
om 02’ 2%
Es p 2 f
“v)Z”” i53 s 22
S2r”~S 0% zi ‘i’ F
G,c
125M 1JM Earth 106-201 211
III 5 3 Bl 1 J Mv + lgnttron 40
On Harness 3 J 2 v L/H Front Srde Lamp 201
2 V Mv
G + lgnrtion Swatch 38
Main Beam 212 3V B Tachometer 66
4G V Dipped Beam
G 213
5 V BI L/H Drrectron lndrcator 107
III 6 6 B 1 J Mv + lgnrtron Swatch - Heater 20
l35B 1G 2J G + lgnrtron Switch - Heater 27
Drpped Beam 214
3
2J G Marn Beam 215
H 4
D 3 v R/H Side Lamp 202
4 J M 5J R
Earth Heater Eart; 24
11 I-203 216
5 V BI 6 J BI Heater Earth 31
R/H Direction lndrcator 112
I408 1 Heated Rear Screen IV 1 0 J 1 BI
162 Main Beam 215
2 2 Heated Rear Screen 2 J V
163 Dipped Beam 213
3 s Boot Lighting 3 G
188 Rear Fog Lamp Swatch
208
4 Side Lamps 4G N
217 + Directron Indicator Swatch 108
5 5
Rear No Plate Lamps 219
B 5 G BI L/H Drrection lndrcator I 109
R 6 2
Stop Lamps 6 G M Earth
147 I105
E 7G R Side Lamps
7 3 L/H DIrectron lndrcator 109 211
8 L? R/H Drrectron Indicator 8G B
110 R/H Directron lndrcator 110
9 t” Reversing Lamps 33 9 J N + Direct Lrghtrng 201
0 Rear Fog Lamps 208 0 BI N + Drrect Lrghting 201
IllOM 1 IV24M 1 + Battery lgnttron Switch 138
2J G Marn Beam 216 2 + Battery lgnrtron Swatch 27
3 3 + Battery lgnttion Switch 5
4 * 4 + Battery - lgnitron Swatch 38
56 R Side Lamps 211 .
B 6 IV31N 1 Heated Rear Screen
7M V Hand Brake 90 I.
8 N + Ignition Switch 79 IV46J 1 J R Windscreen Wiper Fast Speed 133
9V N + Direct 68 2 J Mv Wrndsc Wtper t lgnrt Swatch 138
0 V BI Tachometer 65 3 G Mv Windscreen Washer Pump
B 138
4 J BI Wrndscreen Wiper Slow Speed 134
II288 1 Side Lamp 204 5G v Windscreen Wiper Parkrng 136
2 B G Hazard Warning Switch 111 .6 G J Windscreen Wiper Timer 135
3B N + Drrect 110 .
B 4 B BI L/H Direction Indicator 111
IV 5 7 B 1 G Mv Windscreen Washer Pump 138
5 6 Mv + lgnitron Switch 111
2 G M Earth 6-80 138
6B J + Drrection Indicator Unit 107
3J G Earth
7 0 160
R/H Direction Indicator 112
G 4 M Cooling Fan Relay 6 a M Earth 113
5G B Horn 159
6 BI Cooling Fan 7
ll32B 1 V Cigar Lrghter Lighting 203 7V J
H 2 + lgnitron Cooling Fan Relay 6
II43M 1 J V13J 1
Earth 94
2 J 2 B V Horn
Earth 93
B 159
MB 3 B M
3 J Earth + Horn
92 159
II538 1 V J Rear View Mtrror De-lcrng V 2 4 BI 1 BI
158 Rear Window Motor
116
2v B Heated Rear Screen Switch 2J V
162 Height Corrector Earth 141
H H 3 V Mv + Ignition Switch 3J N + Drrect height Corrector 144
4J B + lgnrtron herght Corrector 139
(Heated Rear Screen) 162
lll12M 1 J Earth 204 189 V32N IN + Battery Junction Box 2
H J N + Crgar Lighter 90 G N + Battery Junctron Box 2
Ill 2 6 M 1 G N + Stop Lamp Switch 147 V45J 1 J R Wrndscreen Wrper Fast Speed 133
2 G M Earth 90 2 J BI Windscreen Wiper Slow Speed 134
3
D 3 G B Windscreen Wrper Parking 136
H 4V R + Glove Box Lrghting 187 4J N + lgnitron Windscreen Wiper 137
5 G Stop Lamp Switch 147 5 J Earth Windscreen Wiper 134
6 V Hand Brake Swatch 90
V54J IJ R Starter Solenord 5
III 3 2 N 1 V R + Direct Radro 191 2 G Bi Reversrng Lamps 33
H 2 ( + lgnrtion Swrtchl G 3 G + lgnrtron Swatch After Fl 34
4G R + lgnrtron Swatch Rev Switch 33
lll44B 1 lgnttron Swatch + C iF3) 138 -
2 lgnrtron Switch + C tF2) 27 V 6 3 R 1 BI N Rear Wrndow Motor 128
3 Starter Swatch 5
H 2G R t Direct After F7 179
4 lgnrtion Switch -t C lgnrtron 38 3J M + Dtrect Rear Crgar Lrgther 139

LOCATION OF THE ELECTRONIC CONTROL MA
UNITS AND RELAYS (All Models) 510.00/3 1
.
t 8531-8532

2 MA LOCATION OF THE ELECTRONIC CONTROL
510.00/3
UNITS AND RELAYS (All Models)
POSITIONING OF THE ELECTRONIC CONTROL UNITS AND RELAYS
No. Description Location
54 ABS Control Unit G
57 Fuel Calculator Unit A
60 Air Conditioning Control Unit A
76 Window Winder Unit F
80 Speed Regulating Unit E 81
Heater Control Unit A
84 Water Level Unit L
87 Water Temperature Unit B
89 Door Locking Warning Unit A
90 Door Lock Control Unit A 91
Remote Control door Lock Unit C
92 Interior Lighting Timer A
93 Bulb Failure Indicator Unit (Salopn) H
93 Bulb Failure Indicator Unit (Safari) J 110
Heater Plug Control Unit
,. K 127
Side lamp Audible Warning D 141
Ignition ECU K 142
Injection ECU E 151
Water temperature Flasher unit B 658
Blower Speed Control Unit E 731
Fuel Injection electronic Relay M 733
Air Cond. Engine Fan Relay K 734
Injector relay M 735
Main Beam Relay D
739 Height Control relay B 743
Air Horn Compressor Relay K 745
Blower Motor Fast Speed Relay A 750
Fog Lamp Relay
6 756
ABS Electra-Valve Relay L 757
ABS Protection Relay L 772
Blower Fan Motor 2nd Speed Relay K 773
Engine Cooling Fan lnverter Relay K 775
Starter Motor Safety Relay (Auto G/Box) B 778
Fuel Heater/Starter Motor Relay (with diode) K
779 Fuel Heater Oil pressure Relay (with diode) K 781
Main fuel Heater Relay K RI
Engine Cooling Fan Relay B R2
Front Window Winder Relay 6 R3
Rear Window Winder Relay B R4
Heated Rear Screen Relay 6 I
Windscreen Wiper Timer Relay
B
C Direction Indicator Unit B

6 ARRANGEMENT OF THE ELECTRICAL INSTALLATION
CX
22 TRS 7185 --)
REF DESCRIPTION LOCATION
“;;;;;roR HARNES:
Circuit Wiring Channel-colour (or unit)
458 R/H stop lamp 105 460 L/H rear fog lamp 156 461 R/H rear fog lamp 157
462 L/H reversing lamp 27
463 R/H reversing lamp 28
470 Fuse l 480 g8 L/H front direction indicator 73 a7 30r G 481 R/H front direction indicator 76 a3 30r D 482 L/H rear direction indicator 74
483 R/H rear direction indicator 75
486 L/H long range lamp connector 159 a7 28 G 487 R/H long range lamp connector 164 a3 2B D 488 L/H headlamp 160-161 a8 3lc G
489 R/H headlamp
162-l 63 a2 3lc D 500 L/H front loudspeaker connections 139
gg IB + IR H 501 R/H front loudspeaker connections 141
gg IB + IR H 502 L/H rear loudspeaker connections 142 k9 28 PG 503 R/H rear loudspeaker connections 147 kl 28 ‘,PD 506 L/H front tweeter connections 140 h9 2B H 507 R/H front tweeter connections 140 hl 28 H
511 Rear fog lamp switch 156 to 158 g5 881 B 519 L/H window motor switch on driver’s door 85 to 87 h9 5B PC ‘520 R/H window motor switch on driver’s door 80 to 82 h9 5M PC 521 L/H window motor switch on passenger’s door 85 to 87 hl 58 PP 532 Heated rear screen switch 110 to 112 j5 5M P 545 Interior lighting switch
114 to 116 j5 58 P 570 Hazard warning switch 75 to 78
g5 8N B 580 Fuel gauge transmitter 59 to 61
96 IM 1N IJ J 600 Windscreen wiper motor 90 to 94 e4 58 D 608 Height control motor 97 to 103 j4 ‘. 38 H 615 R/H front window motor 80-81
gg 30r LV 616 L/H front window motor 85-86
gl 30R PP 621 Air intake motor 15-16 e3 2B Q 622 Air distribution motor 13-14
94 28 0 625 R/H front door lock motor 125-127
0 ZM-3B H 626 L/H front door lock motor 128 to 131 jl ZM-3B H 627 R/H rear door lock motor 125 to 127 p9 2M-3B PG 628 L/H rear door lock motor 128 to 131 pl 2M-3B PD 629 Boot door lock motor 131
t5 2B C 630 Fuel flap lock motor 127 s2 28 X 635 Engine cooling fan motor 11 a6 IM-IR V 640 Clock 32 to 34 f5 4M BA 650 Engine oil pressure switch 44 d3 IM RC 658 Blower fan speed control module 20 f3 1 V-l BI Q 680 Windscreen washer pump 95 el 2N D 690 Central interior lighting 113 to 115 n5 1N+2xllc+lM P 695 Front interior spot lamp 113 n5 lN-1M P 698 Headphone socket 143 to 146 k5 58 H 710 12 V supply soket 89 k5 IN + IM H 721 Radio connections t 12V and loudspeakers) I” + ” - &, LS) 139 to 147 k5 lR+4x2B H 727 Carburettor mixture heating element 7 IIC RM 735 Main beam relay 163-164 q7 5N T 739 Height control relay 98 to 102 f7 5N H 745 Blower motor fast speed relay 18 to 20
94 5N Q 778 Mixture element temperature relay 5 to 7 5lc RC 779 Mixture element engine running relay 8-9 5lc RC 781 Mixture element engine starting relay 6-7 5N RC 788 Engine cooling fan resistance 11 38 V 795 Lighting rheostat 62 g6 4B B 810 L/H direction indicator repeater connectrons 72 e9 II&l + IICT G 811 R/H direction indicator repeater connections 77 el II&l + IICV D 831 Interior temperature selection motor 21 to 25
cl5 5B K 836 Oil level sensor 57-58 c4 28 M 839 Interior air temperature sensor 24
j5 28 P 850
2 stage engine cooling fan thermal switch 11-12
b6 3lc V 853 Mixture element temperature thermal switch 5 IJS + IJti RM 855 Max. coolant temperature thermal switch 39 c4 IB M 935 Blower motor 19 d5 IN + li;j Q 945 Heated rear screen 111 r3 to 7 IN + IN F + ML 980 Door locked warning lamp 132
99 Ilc + Ilc H