ECU Citroen CX 1983 1.G User Guide

Downloaded from www.Manualslib.com manuals search engine OPERATION No MA. 210-O : (.h(~~-ki/lg n~lc/ c~tlj~~s/irtg the igrlitiorl Op. MA. 210-O 3
1. Checking the condition of the contacts :
Check the voltage drop across the contacts ( contacts closed ) under a voltage of 12 volts. using a test-bench.
The voltage drop should be 0.2 volts max.
I
2. Checking the centrifugal advance curve :
a) Note the advance in stages for steadily increasing engine speeds from 0 to 3000 rpm. and for steadily
decreasing engine speeds from 3000 rpm to 0, t~/~kjj/$ SII~L’
the irirwasc, or d~,rrc~as~’ is c-o~~ti~ootl.5.
These points must fall within the shaded area of the curve.
b) To a certain extent. it is possible to correct the advance curve, by altering the tension of the springs for
the centrifugal weights To obtain this condition, slightly bend (
iv t/1(, np1)ro/)riotc, ciirectioll J the securing
brackets for the springs, or replace them.
IY NOTE : If luminous spots are produced outside the four normal positions at speeds under 3000 rpm. make
5 sure the contact points are clean and if necessary make sure the test-bench battery is fully charged. before
U replacing the contact-breaker unit. the spring of which may have weakened.
7
co
m
r 3. Checking the spark regularity :
2
Whatever the speed of rotation, the angular difference of the four opening positions of the points must n.ot
3 exceed lo I 21n.xint~lm r/In/ oj distributor : 3250 I./)NI. c,.vcc,pt I)l’(.lit,t.tt~K 525 06X A : 2750
r/m 1,
c
E
!i
a
z 4. Ch k’ ec rng and adjusting the dwell angle :
Run the distributor at a steady speed, and check that the dwell angle is equal ;o 55’ ? 2”30’. If this is not the
case, adjust the contact breaker to obtain this condition.
5. Checking the ignition condenser :
With the contact points open. measure the capacity of the condenser; This value must be 0.30 i 0.03 wF.
If this is not the case. replace the condenser.
6. Check the vacuum advance curve :
This check is carried out at a constant rpm of 200, with no centrifugal advance.
Check the points of the increasing curve. and the decreasing curve. If the vacuum capsule has n hathcr.
it will be necessary to blank it off during this check.

Downloaded from www.Manualslib.com manuals search engine OPERATION No MA. 210.0 : c l~vritis,e nvrl <u/;,,c/;,,~ ,,I$’ ii’,,i,io,n Op. MA. 210.0 5
Provisionally position support plate (2 1 and
gently tighten nut ( 1 )
c) Switch on ignition
Connect a test lamp to earth and to the G RUP B)
terminal of the ignition coil.
Turn the distributor until the exact moment
when the indicator lamp liqhts up.
At this point the distributor is al the static
advance point.
Switch off the ignition.
Tighten nut ( 1 ) from 19 to 21 mN ( 1.9 to
2.1 m kq 1 ( 13 l/2 to 15 ft.lb 1.
Fit distributor cap and secure it
Fit sparking plug in cylinder No 1 2. Checking the ignition timing using a stroboscopic
Imp or (I test-bench
( See chapter I,, page 1 i.

Downloaded from www.Manualslib.com manuals search engine OPERATION No MA. 210-O Q : C.‘/)c,r&iug nnrt nrljtlsliug I110 c~t~~clro~~ic igrliliorl sj’slvnv. Op. MA. 210-O a 3
1. Adiust star-point gop : 0.3 to 0.5
mm
2. Check the centrifugal advance curve :
a) Note the advance in stages for steadily increasing engine speeds from 0 to 3000 rpm and for steadily decreasing
engine speeds from 3000 rpm to 0. making sure the increase or decrease is continuous. These points must fall
within the shaded area of the curve.
b ) To a certain extent. it is possible to correct the advance curve. by altering the tension of the springs for the
z centrifugal weights To obtain this condition slightly bend (
irr I~V nppropriate clirvcliou ) the securing brackets
6 for the springs. or replace them.
ot,
43
a
3
E
E 3. Checking the symmetry of the star-points :
-z
0
IFi
The angular positioning of the 4- star-points must be the same to within 1”. whatever the speed of the engine.
4. Checking the vacuum advance curve :
This check is carried out at a constant 200 rpm. with no centrifugal advance.
Check the points for the increasing curve, then the decreasing curve.
If the vacuum capsule has a breather, it will be necessary to blank it off during the’test.

Downloaded from www.Manualslib.com manuals search engine 4 OPERATION No MA. 210-O o : (./wrkh,i: rind nrlj,,s/inp /hc rlvr/,riai< igvi,io,, ~YS/C,,,,.
II;. FITTING THE DISTRIBUTOR ONTO THE VEHICLE
_ water pump
LONGITUDI 1 AL AXlS OF ENGINE
.-.-.-
distributor arm
Position of dist:ibutor arm befol
fitting distributor in its mountin 1. Set the distributor to the static advance curve :
a) Bring piston in N’ 1 cylinder to the static
advance point LTS follows
Lift the L H. front wheel of the vehicle
i ,..I,. .\;,I<~ o, / vhirl<~ in< kvd ,,/I, and engage
4th or 5th qeor.
Remove the spark plug from N’ 1 cylinder
Blank off the plug-hole (use a plug ).
Rotate the L H. front wheel and stop when the
plug is forced out by the compression.
Rotate wheel slowly to bring the 10, markiicai
on the flywheel ( 1 ) opposite fixed mark cs b >)
visible throuqh opening S< a ))
b 1 Fit the distributor
Remove the distributor cop: insert the distri-
butor into its housing ( see position in dioqrom
and photograph on this page ).
Provisionally position fixing clamp and
moderately tighten nut.
Position distributor cap and secure it.
Fit spark plug to N’ 1 cylinder. 2. Adiust distributor timing using either strobe
lamp or test-bench :
25” .a+ 2500 rpm I 7 “c,,,m nrli n,,ci’ rlicronsvr~d)
Tiqhten distributor clomp nut from 1.9 +o 2.1 daNm
( 13.5 to 15 ft.lb ).

Downloaded from www.Manualslib.com manuals search engine OPERATION No MA. 236.0 : C h<,rki,,p a,,d nd;r,slh,p I/w jwllr\s aurl /x,//s Op. MA. 2360 I
PULLEY ALIGN& IENT
1. Aligning the camshaft pulley :
a) Position device 3085-T on the water pump
pulley.
b) Bring its rod into contact with the groove of the
camshaft pulley.
NOTE Aligning the camshaft pulley is carried
out by’plocing shims behind the pulley.
Tightening torque for nut (2) for the comshoft
pulley : 8 daNm ( 58 h.lb ).
2. Aligning the alternator pulley :
Proceed as for camshaft pulley / ,,,;/I> s<wrinp
SC-r<,!, , j I /or I,,<, RllI~)11010F c<)L,, <,d i,, ,,
NOTE Aligning the alternator pulley is carried
out by plocinq shims behind the pulley.
Tightening torque for nut (4) for the olternatov
pulley : 4 daNm ( 29 ft.lb ).
3. Aligning the high pressure pump :
a ) Tighten pump on its support plate
b) Place device 3085-T on the camshaft pulley.
c) Brinq its rod into contact with the groove of the
pump pulley.
NOTE Aliqninq the H P pump is curried out using
adjustment shims placed between the pump housing
and the support plate.
Tightening torque for the nut securing the H.P. pump :
4 doNm ( 29 ft.lb ).
NOTE Vchirlc,s filled ,,~;//I oirrrii,rli/iriniii,~
For the alignment of the compressor pulley, SLO
Opr~mrio~, MA, ~,40.,-(,.

Downloaded from www.Manualslib.com manuals search engine OPERATION No MA. 390-O : Checkin
P the hydraulic componm~s on the ucbicle Op. MA. 390-O 3
f Mama sleeting wbi&s I
6. Checking the safety valve :
=I
bl
Cl
dl
Remove safety v&e fixing screw ( 1 ).
Remove from safety valve :
supply pipe for front suspension (2 ),
- supply pipe for rem suspension (3):
Plug openings of safety valve ( pIugs E J.
Tighten pressure regulator bleed screw
and
start engine.
Disconnect rubher overflow return pipe and
watch aperture ~a>> of safety valve.
- I/ Iherr is a slight c7moa,,t 0, sHymge thr
sa/cty ~dve is s in good ordrv n.
el
-If thrr~ is a discharge of fluid the sniw
dw must be rqlacrd..
f ) Slacken pressure regulator bleed screw-
Conned overflow return pipe to safety valve.
Secure safety valve ( screw (( 1 a) 1.
7. Checking the safety valve slidevolve :
a) Remove plug from rem suspension outlet on
safety v&e at G b >a.
b ) Disconnect contact breaker lead on coil and
turn engine using stmter : fluid should start
to run through the opening a d N when pressure
reaches
1lLl +o 130 bars ( 1585 to 1885 psi )
c) Slacken pressure regulator bleed screw.
Connect contact breaker lead.
d ) Plug safety valve opening u b )) (plug E ).
8. Checking the hydraulic brake contml :
m ) Tighten pressure regulator bleed screw.
b) Start up engine.
When cut-out takes place wait a fen: seconds
for the pressure to stobilize.
Stop engine%
Watch pressure gauge and note the pressure
drop in the next 3
minutes. If pressure drop
exceeds 10 bors*( 145 psi ) repeat the test.
If the re&lt is the same. the broke control
valve is defective : change it.

Downloaded from www.Manualslib.com manuals search engine a OPERATION N’ MA. 410-O : (./~rrkiq N,,I/ </r/jes/irq /hc /mvI n.v/<. /(vi/.
VI. CHECKING AND ADJUSTING THE STEERING GEOMETRY
The crossmember supporting the steering has slots at its fixing point on the front subframe.
Any vertical movement of this crossmember alters the steering geometry.
WARNING
This operation is only to
be carried out in certain ccxses such as
-accidental impact, with repercussions on the steering system.
-work on the vehicle entoiling removal of steering crossmember.
- vehicle with poor
road stability ( p oar stright-line stability) 01 with excessive tyre weor.
CHECKING
1, Prepare the vehicle. as for checking front wheel
alignment ( Srr ~ho/,lvr
V I.
NOTE
A ) \In,,unl ~fi~<,r;,,~ I chiclvs :
With the steering in the /< straightahead 1)
position. lock the steering using CI commercially
available tool ( FACOM _ MULLER -WILMONDA)
B) PO,, P)’ \,r,rr;ng r’cliirl<,.s :
Do not actuate steering wheel during check
( hydraulic locking of rock 1.
As a precaution. a steering wheel iocking
tool may also be
used. 2. Mark position of vehicle in relation to
ground :
Secure a weighted length of string to the front
bumper. and
mark the position of the weiqht on
the ground ( The
object of this is to always bring
the vehicle
bock to the some position in order to
carry out correct measurements 1.
NOTE Other procedure
This check having to be carried out wheel hy wheel.
it is possible to use the free projector.
Secure projector to scuttle panel crossmemher, and
focus it onto a fixed object, which will indicate the
initial positioning of the vehicle.
3. Measure the variation in the wheel alignment wheel
by wheel, ds o function of the height of the vehicle.
a) From Ihc m~nwnl rlri,:ir,g posi/ior, lo /hc hi@
posilio,, f ftouad 1 :
With vehicle in mwmal rlriving position.
engine running ond position marked in relation
to groond :
Mark position of luminous spot on front graduated
rule.
Place m’anual height control lever in hi&
posilirrrl.
and wait for vehicle to stabilize.
Check and adjust if necessary position of vehicle
in relation to ground. ( II
eight 01 Inmbrous spol
ou /i wd 0 hit,< I J.
Mark position of luminous spot on front graduated
rule. and on rear one
1) Front and rear readings ore the some (no
variation in alignment in the wheel 1.
NOTE : The reading f I,i$ or lorr posilios J
on the qroduated rules differs from the initial
reading f non,,nl >r,nrlinl:
position J because
the front track has altered.
2) Front and rear readings ore different ( in this
case the alignment has oltered,.either in
toe-in or toe-out ).
0 to 1 mm toe-in is permissible on either wheel
b) ,:rr ,,I, /bv IIDIINRI hi&g ,,osi,;orr lo ,I,<, lo,,
posiliov f Hrlmuad ) :
Proceed OS for previous measurements, place
manual height control lever in low position. In
this case. the permissible difference in oliqn-
ment
is O.to 1 mm toe-out.

Downloaded from www.Manualslib.com manuals search engine OPERATION No MA. 4104 : (./ , k’ 1<c a,,g I,< n / nd;i,,s/i,,g I/><, jr.or,/ ovl<, ,,i,it Op. MA’. 410-O 9
ADJUSTMENT
NOTE The steering crossmember will have to be
moved (IS a function of the readings obtained during
checkinq
01) Towards the top to
obtain
_ toe-out ir, Ihe hish positim
- toe-in irr the 10~ psitios
b) Towards the bottom
to obtain
.
toe-in in Ihr hi& posilins
- toe-out iu fhc IOU posilios
4. Remove the rubber shields ( 1 ) from the wheel-
arches.
5. On each ,upper wheelorm spindle (2 ). position
tools 6451-T, screw (3) resting on steering
crossmember ( 4 1.
NOTE.
6. Slacken nut ( 5) and screw (6 1 securing the wind-
screen crossmember. on the side to be moved.
Slacken the upper fixing nut on the opposite
side as well li,r order 10 nrmoid rlistorfina II><,
crr~.ss,nP”,b<~r ,,
7. Move the crossmember in the direct& decided,
by using (1s a mark extremity (( a u of screw ( 3).
8. Tighten ‘the fixing nuts and the screw for the
crossmember. Tightening torque : 2.5 ta 2.8 doNm ( 18 ta
20 l/2 ft.lb ).
9. Check once mew the variations in wheel aliqn-
merit. and alter the position of steering cross-
member. if necessary. 10.
Remove tools 6451-T and fit the rubber shields
to the wheelarches.
Adjust if necessary. 11.
Check the toe-in of the front wheels 1 to 4 mm.

Downloaded from www.Manualslib.com manuals search engine OPERATION No MA. 430.00 : c ,,<,,a< ,<,r;s,;rs mi/ .s/wrin/ ,vn/srrs oi /he srmf~rw.~ion Op. MA. 430-00 5
II. SPECIAL FEATURES
Adjusting the anti-roll bars :
A, t/xv ,ms,
- Lateral positioning equal protrusion on either side to within 2 mm
- Anti-roll bar bearing preload 300 N ( 30kg) ( 66 lb )
- Lateral clearance of anti-roll bar. under pressure of 500 N i 50kq I( 110 fb i 0.2 to 1 mm
,I, l/X“ rcnr :
- Lateral positioning same thickness of shim on both sides. within 1 mm
- Shimming, if necessary. level with the split collars to within 0.6 mm
Greasing of the suspension piston con-rod ioint :
( Carried out with LHM liquid contained in the dust cover )
- Front suspension cylinder
- Rear suspension cylinder
Upper front wheelarm stops :
WARNING ‘,hc ,,,;,,,i<~, ~,op ,,,I (i, he ii,,, r/ 01 //I< ,,I?<,<‘/ wd. 7cm3
25 cm3
Tightening torques :
- Anti-roll bar link-rod on upper wheelarm. i Bush nut 3 doNm ( 21 11 2 ft.lb )
NYLSTOP nut 4.5 to 5daNd32 1/‘2to 36ft.lb)
- Link-rod on anti-roll bar 4.5 to SdaNm(32 1/2to36ft.lb)
. Screw securing front anti-roll bar bearing 2.7 daNm ( 19 l/2 ft.lb )
^ - Clamps for adjusting pie-load on front anti-roll bar 13 doNm ( 9 l/2 ft.lb)
b2 - 1.5 daNm [ 11 ft.lb i
0 Clomp for height corrector control
rod ( front and rem )
”
6 daNm ( 43 l/ 2 ft.lb ) - . An+iwroff bar 0” rear &&arm ( rear fixing
points ) I /nc<’ nvrl /hrcn,l~r<nscn’!
&
- Rear anti-roll bar split collars :
cc
-5 Tightening torque for screw ( 1 )
according to width (e) of bearing :
:
2
e = 5 mm 8 d.aNm ( 58 ft.lb ) f -I’, I’JiS,
P
e-6mm lOdoNm( lOft.lb)i 121Vi-’
Fitting of the front and rear wheelarm stops using water
Fitting of the front anti-011 bar bearing shells using ,< TOTAL MULTIS I) grease.

Downloaded from www.Manualslib.com manuals search engine ll, SPECIAL FEATURES
STEERING PINION
After adjusting wheel alignment, protrusion of track-rod thread in relation to lock-nut must be equal on either side
( .to within 2 mm )
Rack centre-point Protrusion of rack must be equal on either side of rack housing
- Clearance at rack plunger ( at minimum clearance point ) .O.l to 0.25
( at minimum clearance point ) ., .,...._...... .._._ 0 1 to 0.25 mm
- Rotational torque of pinion, after
adjustment of plunger .._..... .._.... 1.2 daNm ( 8 l/2 ft.lb)
L 44.3
Steering control :
- Clearance between universal joint, steering shaft and fixed
steering wheel tube spacer 0.25 to 1 mm
.._....__._..._.... ._..__..
- Position of steering wheel spoke in (( straight-ahead ))
position. single spoke pointing vertically downwards
- Angle of universal joint : 17” to the left approx. (with steering
wheel in (( straight-ahead )) position.
- Coupling for steering pinion flange ( steering shaft ) ....................................
- Flange on steering pinion ................................................................................
- Steering pinion securing flange ........................................................................
- Steering rack ball joint f rack Jacked )’ .............................................................
- Track-rod lock-nut ..............................................................................................
- Rack housing on steering crossmember ..........................................................
-. Steering crossmember on front subframe ..........................................................
- Nut for track-rod ball-joint ................. ................................... ..... ...................... Tightening torques :
- Flange for universal joint on steering shaft __..._.__.._._.........,.........................,. 1.3 to 1.4 daNm ( 9 11 2 to
lOft.lb)
- Fixed steering wheel tube attachments
. . . . . . . . . . . . . . . . . . . . . 1 9 to 2.1 daNm (13 l/2 to15ft.lb)
3.1 to 3.4 daNm (22 l/2 to 241/2ft,lb)
1.3 to 1.4 daNm ( 9 l/ 2 to 10 ft.lb)
1.3 to 1.4 daNm (9 l/2 to 10 ft.lb)
.5 to’5.5 daNm (36 to 40 ft.lb)
3.6 to 4 daNm ( 26 to 29 ft.lb)
2.5 to 2.8 daNm ( 18 to 20 l/2 ft.lb)
2.5 to 2.8 daNm (18 to 20 1/2ft.lb)
9 to 10 daNm ( 65 to 72 l/2 ft.lb)
- Greasing of steering rack TOTAL MULTIS MS