1988 CITROEN CX Service Manual

“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

n 30
llt
--+
n
42
5 --+9: 2OOC --+ # 3OOOQ
302
9 --+ 8 : 20°C #: 200 fl
7 L
1000 Q 8
--+ 7 : 20°C 100 fl 5 --+12:4+5fl
+
576 1 -+ 2#16Q

q 5r!
9 --+3
0
c+
0 0
q IO
If
nr
q
20
0 x2
q 3:
0 192
II 40
3 192
‘c g--+2
= on
II 59
3 4 x2

u IO
--+ 11
nr
0 2: o”c : 5000 n
5 -+I0 t 20°C : 2500 Cl
80°C: 300Q
8531

0
80°C
0
750+50 min
150
cl
1000 min
,3% co 5-+1